UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-Q

(Mark One)

ý		QUARTERLY REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the quarterly period ended April 2, 2005

or

o		TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from to

Commission file number: 000-29823

SILICON LABORATORIES INC.
(Exact name of registrant as specified in its charter)

Delaware		74-2793174
(State or other jurisdiction of incorporation or organization)		(I.R.S. Employer Identification No.)

4635 Boston Lane, Austin, Texas		78735
(Address of principal executive offices)		(Zip Code)

(512) 416-8500
(Registrant’s telephone number, including area code)


(Former name, former address and former fiscal year, if changed since last report)

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Sections 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days. ý Yes o No

Indicate by check mark whether the registrant is an accelerated filer (as defined in Exchange Act Rule 12b-2). ý Yes o No

APPLICABLE ONLY TO ISSUERS INVOLVED IN BANKRUPTCY
PROCEEDINGS DURING THE PRECEDING FIVE YEARS:

Indicate by check mark whether the registrant has filed all documents and reports required to be filed by Sections 12, 13 or 15(d) of the Securities Exchange Act of 1934 subsequent to the distribution of securities under a plan confirmed by a court.

o Yes o No

APPLICABLE ONLY TO CORPORATE ISSUERS:

Indicate the number of shares outstanding of each of the issuer’s classes of common stock, as of the latest practicable date.As of April 19, 2005, 52,825,307 shares of common stock of Silicon Laboratories Inc. were outstanding.

				PAGE NUMBER

PART I.			FINANCIAL INFORMATION

	ITEM 1		Financial Statements:

			Condensed Consolidated Balance Sheets at April 2, 2005 and January 1, 2005	3

			Condensed Consolidated Statements of Income for the three months ended April 2, 2005 and April 3, 2004	4

			Condensed Consolidated Statements of Cash Flows for the three months ended April 2, 2005 and April 3, 2004	5

			Notes to Condensed Consolidated Financial Statements	6

	ITEM 2		Management’s Discussion and Analysis of Financial Condition and Results of Operations, and Factors Affecting our Future Operating Results	13

	ITEM 3		Quantitative and Qualitative Disclosures About Market Risk	37

	ITEM 4		Controls and Procedures	37

PART II.			OTHER INFORMATION

		ITEM 1	Legal Proceedings	38

		ITEM 2	Unregistered Sales of Equity Securities and Use of Proceeds	39

		ITEM 3	Defaults Upon Senior Securities	40

		ITEM 4	Submission of Matters to a Vote of Securities Holders	40

		ITEM 5	Other Information	40

		ITEM 6	Exhibits	40

CAUTIONARY STATEMENT

EXCEPT FOR THE HISTORICAL FINANCIAL INFORMATION CONTAINED HEREIN, THE MATTERS DISCUSSED IN THIS REPORT ON FORM 10-Q (AS WELL AS DOCUMENTS INCORPORATED HEREIN BY REFERENCE) MAY BE CONSIDERED “FORWARD-LOOKING” STATEMENTS WITHIN THE MEANING OF SECTION 27A OF THE SECURITIES ACT OF 1933, AS AMENDED, AND SECTION 21E OF THE SECURITIES EXCHANGE ACT OF 1934, AS AMENDED. SUCH FORWARD-LOOKING STATEMENTS INCLUDE DECLARATIONS REGARDING THE INTENT, BELIEF OR CURRENT EXPECTATIONS OF SILICON LABORATORIES INC. AND ITS MANAGEMENT AND MAY BE SIGNIFIED BY THE WORDS “EXPECTS,” “ANTICIPATES,” “INTENDS,” “BELIEVES” OR SIMILAR LANGUAGE. YOU ARE CAUTIONED THAT ANY SUCH FORWARD-LOOKING STATEMENTS ARE NOT GUARANTEES OF FUTURE PERFORMANCE AND INVOLVE A NUMBER OF RISKS AND UNCERTAINTIES. ACTUAL RESULTS COULD DIFFER MATERIALLY FROM THOSE INDICATED BY SUCH FORWARD-LOOKING STATEMENTS. FACTORS THAT COULD CAUSE OR CONTRIBUTE TO SUCH DIFFERENCES INCLUDE THOSE DISCUSSED UNDER “FACTORS AFFECTING OUR FUTURE OPERATING RESULTS” AND ELSEWHERE IN THIS REPORT. SILICON LABORATORIES DISCLAIMS ANY INTENTION OR OBLIGATION TO UPDATE OR REVISE ANY FORWARD-LOOKING STATEMENTS, WHETHER AS A RESULT OF NEW INFORMATION, FUTURE EVENTS OR OTHERWISE.

PART I. FINANCIAL INFORMATION

ITEM 1. FINANCIAL STATEMENTS

SILICON LABORATORIES INC.

CONDENSED CONSOLIDATED BALANCE SHEETS

(IN THOUSANDS, EXCEPT PER SHARE DATA)

	April 2, 2005			January 1, 2005
	(Unaudited)
ASSETS
Current assets:
Cash and cash equivalents	$	242,107		$	48,636
Short-term investments	61,566			228,470
Accounts receivable, net of allowance for doubtful accounts of $1,464 at April 2, 2005 and $1,088 at January 1, 2005	52,267			46,272
Inventories	29,986			38,405
Deferred income taxes	10,132			9,878
Prepaid expenses and other	6,072			5,244
Total current assets	402,130			376,905
Property, equipment and software, net	31,781			34,559
Goodwill	47,002			46,766
Other intangible assets, net	14,767			15,384
Other assets, net	12,477			10,788
Total assets	$	508,157		$	484,402

LIABILITIES AND STOCKHOLDERS’ EQUITY
Current liabilities:
Accounts payable	$	33,589		$	37,001
Accrued expenses	11,674			11,913
Deferred income on shipments to distributors	28,459			25,227
Income taxes payable	11,101			8,207
Total current liabilities	84,823			82,348
Long-term obligations and other liabilities	2,200			2,570
Total liabilities	87,023			84,918
Commitments and contingencies

Stockholders’ equity:
Preferred stock—$.0001 par value; 10,000 shares authorized; no shares issued and outstanding	—			—
Common stock—$.0001 par value; 250,000 shares authorized; 52,805 and 52,508 shares issued and outstanding at April 2, 2005 and January 1, 2005, respectively	5			5
Additional paid-in capital	291,301			287,908
Deferred stock compensation	(3,904		)	(4,787		)
Retained earnings	133,732			116,358
Total stockholders’ equity	421,134			399,484
Total liabilities and stockholders’ equity	$	508,157		$	484,402

THE ACCOMPANYING NOTES ARE AN INTEGRAL PART OF THESE CONDENSED CONSOLIDATED
FINANCIAL STATEMENTS.

SILICON LABORATORIES INC.

CONDENSED CONSOLIDATED STATEMENTS OF INCOME

(UNAUDITED)

(IN THOUSANDS, EXCEPT PER SHARE DATA)

	Three Months Ended
	April 2, 2005			April 3, 2004
Revenues	$	104,764		$	113,623
Cost of revenues	48,550			51,866
Gross profit	56,214			61,757
Operating expenses:
Research and development	18,967			18,142
Selling, general and administrative	16,721			15,204
Amortization of deferred stock compensation	753			1,237
Operating expenses	36,441			34,583
Operating income	19,773			27,174
Other income (expense):
Interest income	1,412			479
Interest expense	(56		)	(50		)
Other income (expense), net	(15		)	1,815
Income before income taxes	21,114			29,418
Provision for income taxes	3,741			9,503
Net income	$	17,373		$	19,915
Net income per share:
Basic	$	0.33		$	0.39
Diluted	$	0.31		$	0.36
Weighted-average common shares outstanding:
Basic	52,468			50,992
Diluted	55,365			55,290

THE ACCOMPANYING NOTES ARE AN INTEGRAL PART OF THESE CONDENSED CONSOLIDATED
FINANCIAL STATEMENTS.

SILICON LABORATORIES INC.

CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS

(UNAUDITED)

(IN THOUSANDS)

	Three Months Ended
	April 2, 2005			April 3, 2004
OPERATING ACTIVITIES
Net income	$	17,373		$	19,915
Adjustments to reconcile net income to cash provided by operating activities:
Depreciation and amortization of property, equipment and software	4,237			4,021
Gain on disposal of property, equipment and software	—			(1,824		)
Amortization of other intangible assets and other assets	625			860
Amortization of deferred stock compensation	753			1,237
Income tax benefit from employee stock-based awards	907			3,230
Changes in operating assets and liabilities:
Accounts receivable	(5,995		)	(7,956		)
Inventories	8,419			5,459
Prepaid expenses and other	(2,679		)	(113		)
Accounts payable	(3,536		)	(10,448		)
Accrued expenses	(238		)	(111		)
Deferred income on shipments to distributors	3,232			190
Deferred income taxes	(181		)	—
Income taxes payable	2,894			1,385
Net cash provided by operating activities	25,811			15,845
INVESTING ACTIVITIES
Purchases of short-term investments	(19,269		)	(145,443		)
Maturities of short-term investments	186,173			112,220
Purchases of property, equipment and software	(2,010		)	(3,863		)
Proceeds from sale of property, equipment and software	215			—
Purchases of other assets	(65		)	(3,394		)
Acquisition of business	—			(109		)
Net cash provided by (used in) investing activities	165,044			(40,589		)
FINANCING ACTIVITIES
Net proceeds from exercises of stock options	2,616			5,232
Net cash provided by financing activities	2,616			5,232

Increase (decrease) in cash and cash equivalents	193,471			(19,512		)
Cash and cash equivalents at beginning of period	48,636			58,434
Cash and cash equivalents at end of period	$	242,107		$	38,922
SUPPLEMENTAL DISCLOSURE OF CASH FLOW INFORMATION:
Interest paid	$	42		$	50
Income taxes paid	$	188		$	4,946
SUPPLEMENTAL DISCLOSURE OF NON-CASH ACTIVITY:
Receivable for sale of property, equipment and software	$	—		$	2,120

THE ACCOMPANYING NOTES ARE AN INTEGRAL PART OF THESE CONDENSED CONSOLIDATED
FINANCIAL STATEMENTS.

SILICON LABORATORIES INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS

(UNAUDITED)

April 2, 2005

1. SIGNIFICANT ACCOUNTING POLICIES

BASIS OF PRESENTATION

The condensed consolidated financial statements, other than the condensed consolidated balance sheet as of January 1, 2005, included herein are unaudited; however, they contain all normal recurring accruals and adjustments which, in the opinion of management, are necessary to present fairly the condensed consolidated financial position of Silicon Laboratories Inc. and its subsidiaries (collectively, the “Company”) at April 2, 2005, the condensed consolidated results of its operations for the three months ended April 2, 2005 and April 3, 2004, and the condensed consolidated statements of cash flows for the three months ended April 2, 2005 and April 3, 2004. All intercompany accounts and transactions have been eliminated. The condensed consolidated results of operations for the three months ended April 2, 2005 are not necessarily indicative of the results to be expected for the full year.

The accompanying unaudited condensed consolidated financial statements do not include certain footnotes and financial presentations normally required under U.S. generally accepted accounting principles. Therefore, these condensed consolidated financial statements should be read in conjunction with the audited consolidated financial statements and notes thereto for the year ended January 1, 2005, included in the Company’s Form 10-K/A filed with the Securities and Exchange Commission (SEC) on April 25, 2005.

RECLASSIFICATIONS

The Company has reclassified investments in auction rate securities from cash and cash equivalents to short-term investments in prior periods to conform to the current year presentation. Accordingly, the Company has revised the classification to exclude $153.9 million from cash and cash equivalents at January 1, 2005 and to include such amount under short-term investments. In addition, the Company has reclassified the purchases and maturities of these investments in auction rate securities in its condensed consolidated statements of cash flows, which decreased cash flows from investing activities by $24.8 million for the three months ended April 3, 2004. The reclassifications had no impact on the Company’s results of operations or its overall financial position.

INVENTORIES

Inventories are stated at the lower of cost, determined using the first-in, first-out method, or market. Shipping and handling costs are classified as a component of cost of revenue in the condensed consolidated statements of income. Inventories consist of the following (in thousands):

	April 2, 2005			January 1, 2005
Work in progress	$		20,711	$	23,149
Finished goods	9,275			15,256
	$	29,986		$		38,405

OTHER COMPREHENSIVE INCOME

There were no significant differences between net income and comprehensive income during any of the periods presented.

INCOME TAXES

The current year effective tax rate differs from prior periods primarily due to the Company’s alignment of its financial structure with its international operational structure affecting the tax results for the first time in fiscal 2005.

SILICON LABORATORIES INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(UNAUDITED)

The U.S. Internal Revenue Service has selected the Company’s 2002 and 2003 federal income tax returns for examination. Although the outcome of tax audits is always uncertain, management believes that the results of the examination will not materially affect the financial position or results of operations of the Company.

RECENT ACCOUNTING PRONOUNCEMENTS

In November 2004, the Financial Accounting Standards Board (FASB) issued Statement of Financial Accounting Standards (SFAS) 151, “Inventory Costs, an Amendment of ARB No. 43, Chapter 4” (SFAS 151). SFAS 151 amends ARB 43, Chapter 4, to clarify that abnormal amounts of idle facility expense, freight, handling costs and wasted materials (spoilage) be recognized as current period charges. It also requires that allocation of fixed production overheads to the costs of conversion be based on the normal capacity of the production facilities. SFAS 151 is effective for inventory costs incurred during fiscal years beginning after June 15, 2005. The Company does not believe that the adoption of SFAS 151 will have a material impact on its results of operations or financial position.

In December 2004, the FASB issued SFAS 123 (revised 2004), “Share-Based Payment”, (SFAS 123R). SFAS 123R addresses the accounting for share-based payments to employees, including grants of employee stock options. Under the new standard, companies will no longer be able to account for share-based compensation transactions using the intrinsic method in accordance with Accounting Principles Board (APB) Opinion No. 25, “Accounting for Stock Issued to Employees”. Instead, companies will be required to account for such transactions using a fair-value method and recognize the expense in the consolidated statement of income. SFAS 123R was originally effective for reporting periods that began after June 15, 2005. In April 2005, the SEC announced the adoption of a new rule allowing companies to implement SFAS 123R at the beginning of their next fiscal year that begins after June 15, 2005. The Company has not yet determined which fair-value method and transitional provision it will follow or the date it will adopt SFAS 123R. However, the Company expects that the adoption of SFAS 123R will have a significant negative impact on its results of operations. The Company does not expect the adoption of SFAS 123R will impact its overall financial position. See STOCK-BASED COMPENSATION in Note 3 for the pro forma impact on net income and net income per share from calculating stock-based compensation costs under the fair value alternative of SFAS 123. However, the calculation of compensation cost for share-based payment transactions after the effective date of SFAS 123R may be different from the calculation of compensation cost under SFAS 123, but such differences have not yet been quantified.

In December 2004, the FASB issued SFAS 153, “Exchanges of Nonmonetary Assets, an Amendment of APB Opinion No. 29” (SFAS 153). The guidance in APB Opinion No. 29, “Accounting for Nonmonetary Transactions”, is based on the principle that exchanges of nonmonetary assets should be measured based on the fair value of the assets exchanged. The guidance in APB Opinion No. 29, however, included certain exceptions to that principle. SFAS 153 amends APB Opinion No. 29 to eliminate the exception for nonmonetary exchanges of similar productive assets and replaces it with a general exception for exchanges of nonmonetary assets that do not have commercial substance. A nonmonetary exchange has commercial substance if the future cash flows of the entity are expected to change significantly as a result of the exchange. SFAS 153 is effective for nonmonetary asset exchanges in fiscal periods beginning after June 15, 2005. The Company does not believe that the adoption of SFAS 153 will have a material impact on its results of operations or financial position.

SILICON LABORATORIES INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(UNAUDITED)

EARNINGS PER SHARE

The following table sets forth the computation of basic and diluted net income per share (in thousands, except per share data):

	Three Months Ended
	April 2, 2005			April 3, 2004
Net income	$	17,373		$	19,915
Basic:
Weighted-average shares of common stock outstanding	52,672			51,430
Weighted-average shares of common stock subject to repurchase	(204		)	(438		)
Shares used in computing basic net income per share	52,468			50,992

Effect of dilutive securities:
Weighted-average shares of common stock subject to repurchase	150			368
Contingent shares, acquisition	712			—
Stock options	2,035			3,930
Shares used in computing diluted net income per share	55,365			55,290

Basic net income per share	$	0.33		$	0.39
Diluted net income per share	$	0.31		$	0.36

Approximately 3,704,000 and 331,000 weighted-average dilutive potential shares of common stock have been excluded from the diluted net income per share calculation for the three months ended April 2, 2005 and April 3, 2004, respectively, as the exercise price of the underlying stock options exceeded the average market price of the stock during the respective periods. The Company has issued 297,000 shares of common stock during the three months ended April 2, 2005, net of repurchases.

2. SEGMENT REPORTING

The Company has one operating segment, mixed-signal analog intensive integrated circuits (ICs), consisting of numerous product areas. The Company’s chief operating decision maker is considered to be the Chief Executive Officer. The chief operating decision maker allocates resources and assesses performance of the business and other activities at the operating segment level.

SILICON LABORATORIES INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(UNAUDITED)

3. STOCK-BASED COMPENSATION

The following table illustrates the effect on net income and net income per share if the Company had applied the fair value recognition provisions of SFAS 123, “Accounting for Stock-Based Compensation” (in thousands, except per share data):

	Three Months Ended
	April 2, 2005			April 3, 2004
Net income – as reported	$	17,373		$	19,915
Total stock-based compensation cost, net of related tax effects included in the determination of net income as reported	470			854
The stock-based employee compensation cost, net of related tax effects, that would have been included in the determination of net income if the fair value based method had been applied to all awards	(6,439		)	(6,204		)
Pro forma net income	$	11,404		$	14,565

Net income per share:
Basic – as reported	$	0.33		$	0.39
Basic – pro forma	$	0.22		$	0.29

Diluted – as reported	$	0.31		$	0.36
Diluted – pro forma	$	0.21		$	0.27

In December 2004, the FASB issued SFAS 123 (revised 2004), “Share-Based Payment”, (SFAS 123R). See RECENT ACCOUNTING PRONOUNCEMENTS above for additional information.

SILICON LABORATORIES INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(UNAUDITED)

4. COMMITMENTS AND CONTINGENCIES

Securities Litigation

On December 6, 2001, a class action complaint for violations of U.S. federal securities laws was filed in the United States District Court for the Southern District of New York against the Company, four officers individually and the three investment banking firms who served as representatives of the underwriters in connection with the Company’s initial public offering of common stock. The Consolidated Amended Complaint alleges that the registration statement and prospectus for the Company’s initial public offering did not disclose that (1) the underwriters solicited and received additional, excessive and undisclosed commissions from certain investors, and (2) the underwriters had agreed to allocate shares of the offering in exchange for a commitment from the customers to purchase additional shares in the aftermarket at pre-determined higher prices. The action seeks damages in an unspecified amount and is being coordinated with approximately 300 other nearly identical actions filed against other companies. A court order dated October 9, 2002 dismissed without prejudice the four officers of the Company who had been named individually. On February 19, 2003, the Court denied the motion to dismiss the complaint against the Company. On October 13, 2004, the Court certified a class in six of the approximately 300 other nearly identical actions and noted that the decision is intended to provide strong guidance to all parties regarding class certification in the remaining cases. Plaintiffs have not yet moved to certify a class in the Silicon Laboratories case. The Company has approved a settlement agreement and related agreements which set forth the terms of a settlement between the Company, the plaintiff class and the vast majority of the other approximately 300 issuer defendants. Among other provisions, the settlement provides for a release of the Company and the individual defendants for the conduct alleged in the action to be wrongful. The Company would agree to undertake certain responsibilities, including agreeing to assign away, not assert, or release certain potential claims the Company may have against its underwriters. The settlement agreement also provides a guaranteed recovery of $1 billion to plaintiffs for the cases relating to all of the approximately 300 issuers. To the extent that the underwriter defendants settle all of the cases for at least $1 billion, no payment will be required under the issuers’ settlement agreement. To the extent that the underwriter defendants settle for less than $1 billion, the issuers are required to make up the difference. The Company anticipates that its potential financial obligation to plaintiffs pursuant to the terms of the settlement agreement and related agreements will be covered by existing insurance. The Company is not aware of any material limitations on the expected recovery of any potential financial obligation to plaintiffs from its insurance carriers. Its carriers appear to be solvent, and the Company is not aware of any uncertainties as to the legal sufficiency of an insurance claim with respect to any recovery by plaintiffs. Therefore, the Company does not expect that the settlement would involve any material payment by it. Furthermore, even if the Company’s insurance were unavailable due to insurer insolvency or otherwise, the Company expects that its maximum financial obligation to plaintiffs pursuant to the settlement agreement would be less than $3.4 million. On February 15, 2005, the Court granted preliminary approval of the settlement agreement, subject to certain modifications consistent with its opinion. The Court ruled that the issuer defendants and the plaintiffs must submit a revised settlement agreement which provides for a mutual bar of all contribution claims by the settling and non-settling parties and does not bar the parties from pursuing other claims. The issuers and plaintiffs have negotiated a revised settlement agreement consistent with the Court’s opinion and are in the process of obtaining approval from those issuer defendants that are not in bankruptcy and the individuals associated with those issuers. Based on the current Court schedule (which is subject to change), the parties must submit a revised settlement to the Court by May 2, 2005 and the underwriter defendants would have until May 16, 2005 to object to the revised settlement agreement. There is no assurance that the Court will grant final approval to the settlement. If the settlement agreement is not approved and the Company is found liable, the Company is unable to estimate or predict the potential damages that might be awarded, whether such damages would be greater than the Company’s insurance coverage, or whether the outcome would have a material impact on the Company’s results of operations or financial position.

SILICON LABORATORIES INC.

NOTES TO CONDENSED CONSOLIDATED FINANCIAL STATEMENTS (CONTINUED)

(UNAUDITED)

Trade Secret and Patent Infringement Litigation

On February 17, 2004, the Company filed a lawsuit against a former employee and Axiom Microdevices Inc., a California corporation, in the United States District Court for the Western District of Texas, Austin Division, alleging theft of trade secrets by the individual and Axiom. The lawsuit also alleges that the employee breached his ethical, contractual and fiduciary obligations to the Company by disclosing trade secrets and confidential information to Axiom and that Axiom tortiously interfered with the employee’s contractual obligations to the Company. On September 14, 2004, the Company added claims for infringement of United States Patents 6,549,071 and 6,788,141 to the pending suit. The patents relate to the Company’s proprietary technology for complementary metal oxide semiconductor (CMOS) RF power amplifiers. At this time, the Company cannot estimate the outcome of this matter or resulting financial impact to it, if any.

Other Litigation

The Company is involved in various other legal proceedings that have arisen in the normal course of business. While the ultimate results of these matters cannot be predicted with certainty, the Company does not expect them to have a material adverse effect on the consolidated financial position or results of operations.

5. ACQUISITION OF CYGNAL INTEGRATED PRODUCTS, INC.

On December 10, 2003, the Company completed its acquisition of Cygnal Integrated Products, Inc. (Cygnal), an innovator in analog-intensive, highly integrated 8-bit microcontrollers (MCUs). As a result of the acquisition, Cygnal’s portfolio of over 50 general-purpose products further diversifies the Company’s existing product line, and will allow it to address the broad-based, high margin, 8-bit MCU and high-performance analog markets. These factors contributed to a purchase price that was in excess of the fair value of the Cygnal net tangible and intangible assets acquired and, as a result, the Company recorded goodwill in connection with this transaction.

The Company is obligated to potentially issue up to a maximum of 1,290,963 additional shares of common stock to shareholders of Cygnal (of which 369,330 shares have already been issued) based on the achievement of certain revenue milestones during the twelve-month earn out period commencing on April 4, 2004 and ending on April 2, 2005. The additional shares will be earned as follows: (1) up to 297,915 shares on a pro rata basis for every dollar of Cygnal product revenues during the earn out period in excess of $10.0 million up to $15.0 million; plus (2) up to 496,524 shares on a pro rata basis for every dollar of Cygnal product revenues during the earn out period in excess of $15.0 million up to $20.0 million; plus (3) up to 496,524 shares on a pro rata basis for every dollar of Cygnal product revenues during the earn out period in excess of $20.0 million up to $24.0 million. During the twelve-month earn out period which ended on April 2, 2005, microcontroller product revenues were $22.3 million. Based upon the revenue achievement, the Company expects to issue an aggregate of approximately 1,081,000 additional shares (of which 369,330 shares have already been issued). The Company has included the remaining approximately 712,000 shares to be issued in this final distribution in its diluted weighted average shares and earnings per share calculations for the three months ended April 2, 2005. The Company expects to issue these shares during the second quarter of fiscal 2005. However, the Company has not recorded the additional purchase price associated with these approximately 712,000 shares as the contingency related to these shares has not been resolved and the shares are not issuable until agreement by both parties or until any dispute is resolved in accordance with the merger agreement. In accordance with Emerging Issues Task Force Issue No. 99-12, “Determination of the Measurement Date for the Market Price of Acquirer Securities Issued in a Purchase Business Combination”, the Company intends to use the average of the closing prices of Silicon Laboratories common stock for the three days before and after the date of the final distribution to value the earn-out shares issued to former Cygnal shareholders in this final distribution. The value of such additional consideration will be recorded as additional purchase price, which will increase the amount of the purchase price allocable to goodwill.

ITEM 2. MANAGEMENT’S DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS, AND FACTORS AFFECTING OUR FUTURE OPERATING RESULTS

THE FOLLOWING DISCUSSION AND ANALYSIS OF FINANCIAL CONDITION AND RESULTS OF OPERATIONS SHOULD BE READ IN CONJUNCTION WITH THE CONDENSED CONSOLIDATED FINANCIAL STATEMENTS AND RELATED NOTES THERETO INCLUDED ELSEWHERE IN THIS REPORT. THIS DISCUSSION CONTAINS FORWARD-LOOKING STATEMENTS. PLEASE SEE THE “CAUTIONARY STATEMENT” ABOVE AND “FACTORS AFFECTING OUR FUTURE OPERATING RESULTS” BELOW FOR A DISCUSSION OF THE UNCERTAINTIES, RISKS AND ASSUMPTIONS ASSOCIATED WITH THESE STATEMENTS. OUR FISCAL YEAR-END FINANCIAL REPORTING PERIODS ARE A 52- OR 53- WEEK YEAR ENDING ON THE SATURDAY CLOSEST TO DECEMBER 31ST. FISCAL YEAR 2005 WILL HAVE 52 WEEKS. OUR FIRST QUARTER OF FISCAL YEAR 2005 ENDED APRIL 2, 2005. OUR FIRST QUARTER OF FISCAL YEAR 2004 ENDED APRIL 3, 2004. ALL OF THE QUARTERLY PERIODS REPORTED IN THIS QUARTERLY REPORT ON FORM 10-Q HAD THIRTEEN WEEKS.

OVERVIEW

We design and develop proprietary, analog-intensive, mixed-signal integrated circuits (ICs) for a broad range of applications. Our innovative ICs can dramatically reduce the cost, size and system power requirements of the products that our customers sell to consumers. We currently offer ICs that can be incorporated into communications devices, such as wireless phones and modems, as well as cable and satellite set-top boxes, residential communication gateways for cable or digital subscriber line (DSL), satellite radios and networking equipment. We also offer a family of 8-bit microcontrollers (MCUs) for use in a broad array of applications such as industrial automation and control, automotive sensors and controls, medical instrumentation, and electronic test and measurement equipment. Our major customers include Agere Systems, Apple, Echostar, Foxconn, Intel, LG Electronics, Sagem, Samsung, Smart Link and Thomson.

Our company was founded in 1996. Our business has grown rapidly since our inception, as reflected by our employee headcount, which increased to 595 at April 2, 2005, from 486 employees at the end of fiscal 2003. As a “fabless” semiconductor company, we rely on third-party semiconductor fabricators in Asia, and to a lesser extent the United States, to manufacture the silicon wafers that reflect our IC designs. Each wafer contains numerous die, which are cut from the wafer to create a chip for an IC. We also rely on third-parties in Asia to assemble, package, and, in the substantial majority of cases, test these devices and ship these units to our customers. We have increased the amount of testing performed by such third parties, which facilitates faster delivery of products to our customers (particularly those located in Asia), shorter production cycle times, lower inventory requirements, lower costs and increased flexibility of test capacity.

Our product set has expanded to a broad portfolio targeting mobile handset and broad-based mixed-signal applications. Our expertise in analog-intensive, high-performance, mixed-signal ICs enables us to develop highly differentiated solutions that address multiple markets. For example, our silicon direct access arrangement (DAA) product family is optimized for the personal computer (PC) modem market; our ISOmodemâ family of embedded modems has been widely adopted by satellite set-top box manufacturers; and our Aeroâ Global System for Mobile Communications (GSM)/General Packet Radio Services (GPRS) transceiver family is being shipped in mobile handsets worldwide. We continue to introduce next generation ICs with added functionality and further integration. In February 2004, we introduced a power amplifier product for GSM/GPRS mobile handsets that is in the sampling stage to wireless customers. In June 2004, we introduced the Aero II transceiver that provides increased performance and integration over our prior offerings and we are now shipping in production volumes. In July 2004, we introduced and are now sampling the Aero EDGE Radio, which addresses the Enhanced Data Rates for Global Evolution (EDGE) standard for mobile handsets. In April 2005, we introduced a family of FM broadcast radio tuner products. Through our acquired MCU business and our internal development efforts, we further diversified our product portfolio. We plan to continue to diversify our product portfolio by introducing products that increase the content we provide for existing applications and by introducing ICs for markets we do not currently address, thereby expanding our total available market opportunity.

We group our products into two categories, mobile handset products and broad-based mixed-signal products. Mobile handset products include the Aero Transceivers, the Power Amplifier, and to the extent incorporated into handsets, the FM broadcast radio tuners and the RF Synthesizers. Broad-based mixed-signal products include our silicon DAA, ISOmodem, ProSLIC, satellite tuner, DSL analog front end, clock chips, optical transceivers and clock & data recovery ICs (CDRs), FM broadcast radio tuners for non-handset applications and general purpose RF Synthesizers for non-handset applications, as well as the microcontroller products.

During the three months ended April 2, 2005, one customer, Samsung, represented 18% of our revenues. No other single end customer accounted for more than 10% of our revenues during the three months ended April 2, 2005. In addition to direct sales to customers, some of our end customers purchase products indirectly from us through distributors and contract manufacturers. An end customer purchasing through a contract manufacturer typically instructs such contract manufacturer to obtain our products and incorporate such products with other components for sale by such contract manufacturer to the end customer. Although we actually sell the products to, and are paid by, the distributors and contract manufacturers, we refer to such end customer as our customer. Two of our distributors, Edom Technology and Uniquest, each selling products to customers in Asia, represented 23% and 12% of our revenues during the three months ended April 2, 2005, respectively. There were no other distributors or contract manufacturers that accounted for more than 10% of our revenues during the three months ended April 2, 2005.

The percentage of our revenues derived from customers located outside of the United States was 89% in fiscal 2004, 80% in fiscal 2003 and 79% in fiscal 2002. This percentage increase in the two most recent years reflects our product and customer diversification and increased market penetration for our products, as many of our mobile handset, and increasingly, broad-based mixed-signal customers manufacture and design their products in Asia. All of our revenues to date have been denominated in U.S. dollars. We believe that a majority of our revenues will continue to be derived from customers outside of the United States.

The sales cycle for the test and evaluation of our ICs can range from one month to 12 months or more. An additional three to six months or more are usually required before a customer ships a significant volume of devices that incorporate our ICs. Due to this lengthy sales cycle, we typically experience a significant delay between incurring expenses for research and development and selling, general and administrative efforts, and the generation of corresponding sales. Consequently, if sales in any quarter do not occur when expected, expenses and inventory levels could be disproportionately high, and our operating results for that quarter and, potentially, future quarters would be adversely affected. Moreover, the amount of time between initial research and development and commercialization of a product, if ever, can be substantially longer than the sales cycle for the product. Accordingly, if we incur substantial research and development costs without developing a commercially successful product, our operating results, as well as our growth prospects, could be adversely affected.

Because many of our ICs are designed for use in consumer products such as PCs, personal video recorders, set-top boxes and mobile handsets, we expect that the demand for our products will be typically subject to some degree of seasonal demand resulting in increased sales in the third and fourth quarters of each year when customers place orders to meet holiday demand. However, rapid changes in our markets and across our product areas make it difficult for us to accurately estimate the impact of seasonal factors on our business.

The following describes the line items set forth in our condensed consolidated statements of income:

REVENUES. Revenues are generated almost exclusively by sales of our ICs. We recognize revenue on sales when all of the following criteria are met: 1) there is persuasive evidence that an arrangement exists, 2) delivery of goods has occurred, 3) the sales price is fixed or determinable, and 4) collectibility is reasonably assured. Generally, we recognize revenue from product sales direct to customers and contract manufacturers upon shipment. Certain of our sales are made to distributors under agreements allowing certain rights of return and price protection on products unsold by distributors. Accordingly, we defer the revenue and cost of revenue on such sales until the distributors sell the product to the end customer. Our products typically carry a one-year replacement warranty. Replacements have been insignificant to date. Our revenues are subject to variation from period to period due to the volume of shipments made within a period and the prices we charge for our products. The vast majority of our revenues were negotiated at prices that reflect a discount from the list prices for our products. These discounts are made for a variety of reasons, including: 1) to establish a relationship with a new customer, 2) as an incentive for customers to purchase products in larger volumes, and 3) to provide profit margin to our distributors who resell our products or in response to competition. In addition, as a product matures, we expect that the average selling price for such product will decline due to the greater availability of competing products. Our ability to increase revenues in the future is dependent on increased demand for our established products and our ability to ship larger volumes of those products in response to such demand, as well as our ability to develop or acquire new products and subsequently achieve customer acceptance of newly introduced products.

COST OF REVENUES. Cost of revenues includes the cost of purchasing finished silicon wafers processed by independent foundries; costs associated with assembly, test and shipping of those products; costs of personnel and equipment associated with manufacturing support, logistics and quality assurance; costs of software royalties and amortization of purchased software, other intellectual property license costs, and certain acquired intangible assets; an allocated portion of our occupancy costs; allocable depreciation of testing equipment and leasehold improvements; and impairment charges related to certain manufacturing equipment held for sale or abandoned. Generally, we depreciate equipment over four years on a straight-line basis and leasehold improvements over the shorter of the estimated useful life or the applicable lease term. Recently introduced products tend to have higher cost of revenues per unit due to initially low production volumes required by our customers and higher costs associated with new package variations. Generally, as production volumes for a product increase, unit production costs tend to decrease as our yields improve and our semiconductor fabricators, assemblers and test operations achieve greater economies of scale for that product. Additionally, the cost of wafer procurement and assembly and test services, which are significant components of cost of goods sold, vary cyclically with overall demand for semiconductors and our suppliers’ available capacity of such products and services.

RESEARCH AND DEVELOPMENT. Research and development expense consists primarily of compensation and related costs of employees engaged in research and development activities, new product mask, wafer, packaging and test costs, external consulting and services costs, amortization of purchased software, equipment tooling, equipment depreciation, amortization of acquired intangible assets, as well as an allocated portion of our occupancy costs for such operations. We generally depreciate our research and development equipment over four years and amortize our purchased software from computer-aided design tool vendors over three to four years. Research and development activities include the design of new products, refinement of existing products and design of test methodologies to ensure compliance with required specifications.

SELLING, GENERAL AND ADMINISTRATIVE. Selling, general and administrative expense consists primarily of personnel-related expenses, related allocable portion of our occupancy costs, sales commissions to independent sales representatives, professional fees, directors’ and officers’ liability insurance, patent litigation legal fees, other promotional and marketing expenses, and reserves for bad debt. Write-offs of uncollectible accounts have been insignificant to date.

AMORTIZATION OF DEFERRED STOCK COMPENSATION. In connection with the grant of stock options and direct issuances of stock to our employees, we record deferred stock compensation, representing, for accounting purposes, the difference between the exercise price of option grants, or the issuance price of direct issuances of stock, as the case may be, and the fair value of our common stock at the time of such grants or issuances. The deferred stock compensation is amortized over the vesting period of the applicable options or shares, generally five to eight years. The amortization of deferred stock compensation is recorded as an operating expense.

INTEREST INCOME. Interest income reflects interest earned on average cash, cash equivalents and investment balances. We generally invest in tax-exempt short-term investments which yield lower nominal interest proceeds.

INTEREST EXPENSE. Interest expense consists of interest on our short and long-term obligations.

OTHER INCOME (EXPENSE), NET. Other income (expense), net primarily reflects the gain on the disposal of fixed assets.

PROVISION FOR INCOME TAXES. We accrue a provision for federal, state and foreign income tax at the applicable statutory rates adjusted for non-deductible expenses, research and development tax credits and interest income from tax-exempt short-term investments.

RESULTS OF OPERATIONS

The following table sets forth our condensed consolidated statements of income data as a percentage of revenues for the periods indicated:

	Three Months Ended
	April 2, 2005		April 3, 2004

Revenues	100.0	%	100.0	%
Cost of revenues	46.3		45.6
Gross profit	53.7		54.4

Operating expenses:
Research and development	18.1		16.0
Selling, general and administrative	16.0		13.4
Amortization of deferred stock compensation	0.7		1.1
Operating expenses	34.8		30.5
Operating income	18.9		23.9

Other income (expense):
Interest income	1.4		0.4
Interest expense	(0.1	)	(0.0	)
Other income (expense), net	(0.0	)	1.6
Income before income taxes	20.2		25.9
Provision for income taxes	3.6		8.4
Net income	16.6	%	17.5	%

COMPARISON OF THE THREE MONTHS ENDED APRIL 2, 2005 TO THE THREE MONTHS ENDED APRIL 3, 2004.

REVENUES

	Three Months Ended
(in millions)	April 2, 2005		April 3, 2004		Change			% Change
Mobile Handsets	$	45.5	$	61.4	$	(15.9	)	(26.0	)%
Broad-Based Mixed-Signal	59.3		52.2		7.1			13.7
Total	$	104.8	$	113.6	$	(8.8	)	(7.8	)%

Mobile Handsets: The decline in the sales of our mobile handset products was driven by decreased demand for our Aero Transceiver family of products which was driven largely by Asian mobile handset customers. Unit sales of our mobile handset products decreased compared to the first quarter of 2004 by 18.4%. In addition, average selling prices in this area decreased compared to the first quarter of 2004 by 9.3%.

Broad-Based Mixed-Signal: Growth in the sales of our broad-based mixed-signal products was primarily driven by increased sales of our: (1) ProSLIC products reflecting growth in demand and market share gains in the voice-over-internet protocol (VoIP) market segment; and (2) microcontroller products, a business that we acquired in the fourth quarter of fiscal 2003. Such growth was offset in part by a decline in revenue from our modem products (consisting of our DAA and ISOmodem products) due to declines in average selling prices and unit sales. Unit sales of broad-based mixed-signal products increased compared to the first quarter of 2004 by 9.0%. In addition, average selling prices in this area increased compared to the first quarter of 2004 by 4.4% reflecting the change in mix in this area towards higher priced items for the most recent quarterly period.

As our products become more mature, we expect to experience decreases in average selling prices in the future. Our revenues will be dependent on our ability to increase sales volumes and introduce higher priced, next generation products and product extensions.

GROSS PROFIT

	Three Months Ended
(in millions)	April 2, 2005			April 3, 2004			Change		% Change
Gross Profit	$	56.2		$	61.8		$	(5.6)	(9.0	)%
Percent of revenue	53.7		%	54.4		%

The decrease in gross profit dollars for the most recent quarter was primarily due to the decrease in sales volumes in our mobile handset product groups offset by the increase in sales volumes of our broad-based mixed-signal product groups.

We expect to experience declines in the average selling prices of our mobile handset products and certain of our broad-based mixed-signal products. This downward pressure on gross profit as a percentage of revenues may be offset to the extent we are able to: 1) introduce higher margin new products and continue to gain market share with our broad-based mixed-signal ICs; and 2) achieve lower production costs from our wafer foundries and third-party assembly and test sub-contractors.

RESEARCH AND DEVELOPMENT

	Three Months Ended
(in millions)	April 2, 2005			April 3, 2004			Change		% Change
Research and development	$	19.0		$	18.1		$	0.9	4.5	%
Percent of revenue	18.1		%	16.0		%

The increase in research and development expense for the recent three month period was principally due to increased staffing and associated occupancy and other costs to pursue new product development opportunities, and to continue to develop new testing methodologies for newly introduced and existing products. The increase was offset in part by a $1.4 million foreign research grant that resulted from a recent study performed on our research and development expenditures during fiscal 2004. We expect future grants will be based upon our levels of research and development expenditures and will be recognized quarterly rather than annually. Some of our more significant development projects in the mobile-handset product area included FM broadcast radio tuners, a power amplifier, a single chip transceiver and an EDGE compliant radio. Significant development projects in the broad-based mixed-signal product area included the F350 and F064 microcontrollers with integrating analog-to-digital converters targeting precision measurement applications. All of these development projects have either been completed or are scheduled to be completed over the next twelve months. Additionally, many of these new products are being sampled by certain of our customers and are in the design-in phase. We don’t expect the products derived from these projects to begin to contribute to revenues in a meaningful way until later this year or fiscal 2006. Additionally, we expect that research and development expense will increase in absolute dollars in future periods as we continue to increase our staffing and associated costs to pursue additional new product development opportunities, and may fluctuate as a percentage of revenues due to changes in sales volume and the timing of certain expensive items related to new product development initiatives, such as engineering mask and wafer costs.

SELLING, GENERAL AND ADMINISTRATIVE

	Three Months Ended
(in millions)	April 2, 2005			April 3, 2004			Change		% Change
Selling, general and administrative	$	16.7		$	15.2		$	1.5	10.0	%
Percent of revenue	16.0		%	13.4		%

The increase in the dollar amount of selling, general and administrative expense for the recent three month period was principally attributable to: (1) an increase of approximately $0.8 million for increased staffing and associated costs related to the expansion of our internal information technology and services support organization; and (2) an increase of approximately $0.9 million for increased staffing and associated costs associated with the geographical expansion of our sales support organization in Asia and Europe. We expect that selling, general and administrative expense will increase in absolute dollars in future periods as we continue to expand our sales channels, marketing efforts and administrative infrastructure. In addition, we expect selling, general and administrative expense to fluctuate as a percentage of revenues because of (1) potential significant variability in our future revenues; (2) fluctuating usage of advertising to promote our products and, in particular, our newly introduced products; and (3) fluctuating legal costs related to litigation and intellectual property matters.

AMORTIZATION OF DEFERRED STOCK COMPENSATION

	Three Months Ended
(in millions)	April 2, 2005		April 3, 2004		Change
Amortization of deferred stock compensation	$	0.8	$	1.2	$	(0.4	)

The decrease in the dollar amounts of amortization of deferred stock compensation is primarily related to the expiration of amortization on certain grants in which the deferred stock compensation has become fully amortized because the grants have become fully vested.

INTEREST INCOME

	Three Months Ended
(in millions)	April 2, 2005		April 3, 2004		Change
Interest income	$	1.4	$	0.5	$	0.9

The increase in the dollar amount of interest income was due to a greater amount of cash and short-term investments balances during the three months ended April 2, 2005 and due to an increase in the interest rates of the underlying instruments during the three months ended April 2, 2005.

INTEREST EXPENSE

Interest expense for the three months ended April 2, 2005 was $56,000, as compared to $50,000 for the three months ended April 3, 2004.

OTHER INCOME (EXPENSE), NET

	Three Months Ended
(in millions)	April 2, 2005		April 3, 2004		Change
Other income (expense), net	$	0.0	$	1.8	$	(1.8	)

Other income (expense), net during the three months ended April 3, 2004 primarily reflected gains on the sale of test equipment. No comparable gains occurred during the three months ended April 2, 2005.

PROVISION FOR INCOME TAXES

	Three Months Ended
(in millions)	April 2, 2005			April 3, 2004			Change
Provision for income taxes	$	3.7		$	9.5		$	(5.8	)
Effective tax rate	17.7		%	32.3		%

The effective tax rate for the three months ended April 2, 2005 was lower than the three months ended April 3, 2004 primarily due to our recent completion of an alignment of our financial structure with our international operational structure. In addition, the rate for the three months ended April 2, 2005 decreased as a result of a non-taxable foreign research grant of $1.4 million that resulted from a recent study performed on our research and development expenditures during fiscal 2004. The effective tax rates for each of the periods presented differ from the federal statutory rate of 35% due to the amount of income earned in foreign jurisdictions where the tax rate may be lower than the federal statutory rate, the impact of research and development tax credits, state taxes, tax-advantaged interest income and other permanent items.

BUSINESS OUTLOOK

We expect revenues in the second quarter of fiscal 2005 to be in the range of $105 million to $108 million. Furthermore, we expect our diluted net income per share to be in the range of $0.25 to $0.27. This diluted net income per share range does not include a charge the Company will take in the second quarter of fiscal 2005 related to the separation agreement with the former Chief Executive Officer.

LIQUIDITY AND CAPITAL RESOURCES

Our principal sources of liquidity as of April 2, 2005 consisted of $303.7 million in cash, cash equivalents and short-term investments. Our short-term investments consist primarily of municipal and corporate debt securities that have initial maturities of less than one year.

Net cash provided by operating activities was $25.8 million during the three months ended April 2, 2005, compared to net cash provided of $15.8 million during the three months ended April 3, 2004. The increase was principally due to decreases in inventory and accounts payable as we align our inventory levels to demand. Operating cash flows during the three months ended April 2, 2005 reflect our net income of $17.4 million, adjustments for non-cash items (depreciation, amortization and tax benefits associated with the exercise of stock options) of $6.5 million, and a net decrease in the components of our working capital of $1.9 million.

Net cash provided by investing activities was $165.0 million during the three months ended April 2, 2005, compared to net cash used of $40.6 million during the three months ended April 3, 2004. The increase was principally due to an increase of $200.1 million in net maturities of short-term investments, including the sale of auction rate securities, and a $5.4 million decrease in net purchases of property, equipment and software and other assets. We have reclassified investments in auction rate securities from cash and cash equivalents to short-term investments in prior periods to conform to the current year presentation. See RECLASSIFICATIONS in Note 1 for additional information.

We anticipate capital expenditures of approximately $25 million for fiscal 2005. Additionally, as part of our growth strategy, we expect to evaluate opportunities to invest in or acquire other businesses, intellectual property or technologies that would complement or expand our current offerings, expand the breadth of our markets or enhance our technical capabilities.

Net cash provided by financing activities was $2.6 million during the three months ended April 2, 2005, compared to net cash provided of $5.2 million during the three months ended April 3, 2004. The decrease in cash flows from financing activities during the three months ended April 2, 2005 was principally due to lower proceeds from the exercise of employee stock options.

Our future capital requirements will depend on many factors, including the rate of sales growth, market acceptance of our products, the timing and extent of research and development projects, potential acquisitions of companies or technologies and the expansion of our sales and marketing activities. We believe our existing cash and short-term investment balances are sufficient to meet our capital requirements through at least the next 12 months, although we could be required, or could elect, to seek additional funding prior to that time. We may enter into acquisitions or strategic arrangements in the future which also could require us to seek additional equity or debt financing.

CRITICAL ACCOUNTING POLICIES AND ESTIMATES

The preparation of financial statements and accompanying notes in conformity with U.S. generally accepted accounting principles requires that we make estimates and assumptions that affect the amounts reported. Changes in facts and circumstances could have a significant impact on the resulting estimated amounts included in the financial statements. We believe the following critical accounting policies affect our more complex judgments and estimates. We also have other policies that we consider to be key accounting policies, such as our policies for revenue recognition, including the deferral of revenues and cost of revenues on sales to distributors; however, these policies do not meet the definition of critical accounting estimates because they do not generally require us to make estimates or judgments that are difficult or subjective.

Allowance for doubtful accounts – We evaluate the collectibility of our accounts receivable based on a combination of factors. In circumstances where we are aware of a specific customer’s inability to meet its financial obligations to us, we record a specific allowance to reduce the net receivable to the amount we reasonably believe will be collected. For all other customers, we recognize allowances for doubtful accounts based on a variety of factors including the length of time the receivables are past their contractual due date, the current business environment, and our historical experience. If the financial condition of our customers were to deteriorate or if economic conditions worsened, additional allowances may be required in the future. Accounts receivable write-offs to date have been minimal.

Inventory valuation – We assess the recoverability of inventories through an on-going review of inventory levels in relation to sales history, backlog and forecasts, product marketing plans and product life cycles. To address the difficult, subjective and complex area of judgment in determining appropriate inventory valuation in a consistent manner, we apply a set of methods, assumptions and estimates to arrive at the net inventory amount by completing the following: First, we identify any inventory that has been previously written down in prior periods. This inventory remains written down until sold, destroyed or otherwise disposed of. Second, we write down the inventory line items that may have some form of obsolescence due to non-conformance with electrical and mechanical standards as identified by our quality assurance personnel. Third, the remaining inventory not otherwise identified to be written down is compared to an assessment of product history and forecasted demand, typically over the last six months and next six months, or actual firm backlog on hand. However, microcontroller product history and forecasted demand is typically measured over the last twelve months and next twelve months, respectively, due to the breadth of customers and markets served and longer product life cycles. Finally, the result of this methodology is compared against the product life cycle and competitive situations in the marketplace driving the outlook for the consumption of the inventory and the appropriateness of the resulting inventory levels. Demand for our products may fluctuate significantly over time, and actual demand and market conditions may be more or less favorable than those that we project. In the event that actual demand is lower or market conditions are worse than originally projected, additional inventory write-downs may be required.

Impairment of goodwill and other long-lived assets – We review long-lived assets which are held and used, including fixed assets and purchased intangible assets, for impairment whenever changes in circumstances indicate that the carrying amount of the assets may not be recoverable. Such evaluations compare the carrying amount of an asset to future undiscounted net cash flows expected to be generated by the asset over its expected useful life and are significantly impacted by estimates of future prices and volumes for our products, capital needs, economic trends and other factors which are inherently difficult to forecast. If the asset is considered to be impaired, we record an impairment charge equal to the amount by which the carrying value of the asset exceeds its fair value determined by either a quoted market price, if any, or a value determined by utilizing a discounted cash flow technique. Occasionally, we may hold certain assets for sale. In those cases, the assets are reclassified on our balance sheet from long-term to current, and the carrying value of such assets are reviewed and adjusted each period thereafter to the fair value less expected cost to sell.

We test our goodwill for impairment annually as of the first day of our fourth fiscal quarter and in interim periods if certain events occur indicating that the carrying value of goodwill may be impaired. The goodwill impairment test is a two-step process. The first step of the impairment analysis compares our fair value to our net book value. In determining fair value, the accounting guidance allows for the use of several valuation methodologies, although it states quoted market prices are the best evidence of fair value. If the fair value is less than the net book value, the second step of the analysis compares the implied fair value of our goodwill to its carrying amount. If the carrying amount of goodwill exceeds its implied fair value, we recognize an impairment loss equal to that excess amount.

Income taxes – We are required to estimate income taxes in each of the jurisdictions in which we operate. This process involves estimating the actual current tax liability together with assessing temporary differences in recognition of income (loss) for tax and accounting purposes. These differences result in deferred tax assets and liabilities, which are included in our consolidated balance sheet. We then assess the likelihood that the deferred tax assets will be recovered from future taxable income and, to the extent we believe that recovery is not likely, we establish a valuation allowance against the deferred tax asset. Further, we operate within multiple taxing jurisdictions and are subject to audit in these jurisdictions. These audits can involve complex issues which may require an extended period of time to resolve and could result in additional assessments of income tax. We believe adequate provisions for income taxes have been made for all periods.

RECENT ACCOUNTING PRONOUNCEMENTS

In November 2004, the Financial Accounting Standards Board (FASB) issued Statement of Financial Accounting Standards (SFAS) 151, “Inventory Costs, an Amendment of ARB No. 43, Chapter 4” (SFAS 151). SFAS 151 amends ARB 43, Chapter 4, to clarify that abnormal amounts of idle facility expense, freight, handling costs and wasted materials (spoilage) be recognized as current period charges. It also requires that allocation of fixed production overheads to the costs of conversion be based on the normal capacity of the production facilities. SFAS 151 is effective for inventory costs incurred during fiscal years beginning after June 15, 2005. We do not believe that the adoption of SFAS 151 will have a material impact on our results of operations or financial position.

In December 2004, the FASB issued SFAS 123 (revised 2004), “Share-Based Payment”, (SFAS 123R). SFAS 123R addresses the accounting for share-based payments to employees, including grants of employee stock options. Under the new standard, companies will no longer be able to account for share-based compensation transactions using the intrinsic method in accordance with Accounting Principles Board (APB) Opinion No. 25, “Accounting for Stock Issued to Employees”. Instead, companies will be required to account for such transactions using a fair-value method and recognize the expense in the consolidated statement of income. SFAS 123R was originally effective for reporting periods that began after June 15, 2005. In April 2005, the SEC announced the adoption of a new rule allowing companies to implement SFAS 123R at the beginning of their next fiscal year that begins after June 15, 2005. We have not yet determined which fair-value method and transitional provision we will follow or the date we will adopt SFAS 123R. However, we expect that the adoption of SFAS 123R will have a significant negative impact on our results of operations. We do not expect the adoption of SFAS 123R will impact our overall financial position. See STOCK-BASED COMPENSATION in Note 3 for the pro forma impact on net income and net income per share from calculating stock-based compensation costs under the fair value alternative of SFAS 123. However, the calculation of compensation cost for share-based payment transactions after the effective date of SFAS 123R may be different from the calculation of compensation cost under SFAS 123, but such differences have not yet been quantified.

In December 2004, the FASB issued SFAS 153, “Exchanges of Nonmonetary Assets, an Amendment of APB Opinion No. 29” (SFAS 153). The guidance in APB Opinion No. 29, “Accounting for Nonmonetary Transactions”, is based on the principle that exchanges of nonmonetary assets should be measured based on the fair value of the assets exchanged. The guidance in APB Opinion No. 29, however, included certain exceptions to that principle. SFAS 153 amends APB Opinion No. 29 to eliminate the exception for nonmonetary exchanges of similar productive assets and replaces it with a general exception for exchanges of nonmonetary assets that do not have commercial substance. A nonmonetary exchange has commercial substance if the future cash flows of the entity are expected to change significantly as a result of the exchange. SFAS 153 is effective for nonmonetary asset exchanges in fiscal periods beginning after June 15, 2005. We do not believe that the adoption of SFAS 153 will have a material impact on our results of operations or financial position.

QUALITATIVE AND QUANTITATIVE DISCLOSURE ABOUT MARKET RISK

Our financial instruments include cash, cash equivalents and short-term investments. Our main investment objectives are the preservation of investment capital and the maximization of after-tax returns on our investment portfolio. Our interest income is sensitive to changes in the general level of U.S. interest rates. Based on our cash, cash equivalents and short-term investments holdings as of April 2, 2005, an immediate one-percentage point decline in the yield for such instruments would decrease our annual interest income by approximately $3.0 million. We believe that our investment policy is conservative, both in terms of the average maturity of our investments and the credit quality of the investments we hold.

FACTORS AFFECTING OUR FUTURE OPERATING RESULTS

RISKS RELATED TO OUR BUSINESS

WE MAY NOT BE ABLE TO MAINTAIN OUR HISTORICAL GROWTH AND MAY EXPERIENCE SIGNIFICANT PERIOD-TO-PERIOD FLUCTUATIONS IN OUR REVENUES AND OPERATING RESULTS, WHICH MAY RESULT IN VOLATILITY IN OUR STOCK PRICE

Although we have generally experienced revenue growth in our recent history, we may not be able to sustain this growth. We may also experience significant period-to-period fluctuations in our revenues and operating results in the future due to a number of factors, and any such variations may cause our stock price to fluctuate. It is likely that in some future period our revenues or operating results will be below the expectations of public market analysts or investors. If this occurs, our stock price may drop, perhaps significantly. For example, our revenues in the third and fourth quarters of fiscal 2004 fell below analyst expectations and resulted in significant declines in our stock price.

A number of factors, in addition to those cited in other risk factors applicable to our business, may contribute to fluctuations in our revenues and operating results, including:

• the timing and volume of orders received from our customers;

• the timeliness of our new product introductions;

• the rate of acceptance of our products by our customers, including the acceptance of new products we may develop for integration in the products manufactured by such customers, which we refer to as “design wins”;

• the time lag and realization rate between “design wins” and production orders;

• the demand for, and life cycles of, the products incorporating our ICs;

• the rate of adoption of mixed-signal ICs in the markets we target;

• deferrals or reductions of customer orders in anticipation of new products or product enhancements from us or our competitors or other providers of ICs;

• changes in product mix;

• the average selling prices for our products could drop suddenly due to competitive offerings or competitive predatory pricing, especially with respect to our mobile handset products;

• changes in market standards;

• impairment charges related to inventory, equipment or other long-lived assets;

• significant legal costs to defend our intellectual property rights or respond to claims against us; and

• the rate at which new markets emerge for products we are currently developing or for which our design expertise can be utilized to develop products for these new markets.

The markets for mobile handsets, personal computers, satellite television set-top boxes and VoIP applications are characterized by rapid fluctuations in demand and seasonality that result in corresponding fluctuations in the demand for our products that are incorporated in such devices. Additionally, the rate of technology acceptance by our customers results in fluctuating demand for our products as customers are reluctant to incorporate a new IC into their products until the new IC has achieved market acceptance. Once a new IC achieves market acceptance, demand for the new IC can quickly accelerate to a point and then level off such that rapid historical growth in sales of a product should not be viewed as indicative of continued future growth. In addition, demand can quickly decline for a product when a new IC product is introduced and receives market acceptance. For example, mobile handset transceivers that provide some of the functionality provided by our RF Synthesizers have been introduced to market by us and our competitors. The introduction of these competing transceivers, including our Aero Transceiver, has resulted in a rapid decline in our sales of RF Synthesizers. Due to the various factors mentioned above, the results of any prior quarterly or annual periods should not be relied upon as an indication of our future operating performance.

WE DEPEND ON A LIMITED NUMBER OF CUSTOMERS FOR A SUBSTANTIAL PORTION OF OUR REVENUES, AND THE LOSS OF, OR A SIGNIFICANT REDUCTION IN ORDERS FROM, ANY KEY CUSTOMER COULD SIGNIFICANTLY REDUCE OUR REVENUES

The loss of any of our key customers, or a significant reduction in sales to any one of them, would significantly reduce our revenues and adversely affect our business. During the first three months of fiscal 2005, our ten largest customers accounted for 56% of our revenues. We had one customer, Samsung, which represented 18% of our revenues. No other single customer accounted for more than 10% of our revenues during the first three months of fiscal 2005. Most of the markets for our products are dominated by a small number of potential customers. Therefore, our operating results in the foreseeable future will continue to depend on our ability to sell to these dominant customers, as well as the ability of these customers to sell products that incorporate our IC products. In the future, these customers may decide not to purchase our ICs at all, purchase fewer ICs than they did in the past or alter their purchasing patterns, particularly because:

• we do not have material long-term purchase contracts with our customers;

• substantially all of our sales to date have been made on a purchase order basis, which permits our customers to cancel, change or delay product purchase commitments with little or no notice to us and without penalty;

• some of our customers may have efforts underway to actively diversify their vendor base which could reduce purchases of our ICs; and

• some of our customers have developed or acquired products that compete directly with products these customers purchase from us, which could affect our customers’ purchasing decisions in the future.

While we have been a significant supplier of the direct access arrangement, or DAA, ICs used in many of our customers’ soft modem DAA products and have also been a substantial supplier of transceivers to Samsung and other major GSM handset manufacturers, our customers regularly evaluate alternative sources of supply in order to diversify their supplier base, which would increase their negotiating leverage with us and protect their ability to secure these components. We believe that any expansion of our customers’ supplier bases could have an adverse effect on the prices we are able to charge and volume of product that we are able to sell to our customers, which would negatively affect our revenues and operating results.

WE ARE SUBJECT TO RISKS RELATING TO PRODUCT CONCENTRATION AND LACK OF REVENUE DIVERSIFICATION

We derive a substantial portion of our revenues from a limited number of products, and we expect these products to continue to account for a large percentage of our revenues in the near term. Continued market acceptance of these products, is therefore, critical to our future success. In addition, substantially all of our products that we have sold include technology related to one or more of our issued U.S. patents. If these patents are found to be invalid or unenforceable, our competitors could introduce competitive products that could reduce both the volume and price per unit of our products. Our business, operating results, financial condition and cash flows could therefore be adversely affected by:

• a decline in demand for any of our more significant products, including our Aero Transceiver, DAA, ISOmodem or ProSLIC;

• failure of our products to achieve continued market acceptance;

• an improved version of our products being offered by a competitor;

• technological change that we are unable to address with our products; and

• a failure to release new products or enhanced versions of our existing products on a timely basis and/or the failure of these products to achieve market acceptance.

We are particularly dependent on sales of our mobile handset products, which constituted 43% of our total revenues during the first three months of fiscal 2005 and 50% of our total revenues in fiscal 2004. In particular, our Aero Transceiver mobile handset product and its subsequent derivatives represented 43% of our total revenues during the first three months of fiscal 2005 and approximately 50% of our total revenues in fiscal 2004. If the market for the Aero Transceiver or the market for GSM/GPRS mobile handsets in which these products are incorporated deteriorates, our operating results would be materially and adversely affected.

IF WE ARE UNABLE TO DEVELOP NEW AND ENHANCED PRODUCTS THAT ACHIEVE MARKET ACCEPTANCE IN A TIMELY MANNER, OUR OPERATING RESULTS AND COMPETITIVE POSITION COULD BE HARMED

Our future success will depend on our ability to reduce our dependence on a few products by developing new ICs and product enhancements that achieve market acceptance in a timely and cost-effective manner. The development of mixed-signal ICs is highly complex, and we have experienced delays in completing the development and introduction of new products and product enhancements. Successful product development and market acceptance of our products depend on a number of factors, including:

• changing requirements of customers;

• accurate prediction of market and technical requirements, such as any shift of GSM/GPRS to EDGE and Wideband Code Division Multiple Access (WCDMA);

• timely completion and introduction of new designs;

• timely qualification and certification of our ICs for use in our customers’ products;

• commercial acceptance and volume production of the products into which our ICs will be incorporated;

• availability of foundry, assembly and test capacity;

• achievement of high manufacturing yields;

• quality, price, performance, power use and size of our products;

• availability, quality, price and performance of competing products and technologies;

• our customer service and support capabilities and responsiveness;

• successful development of our relationships with existing and potential customers;

• changes in technology, industry standards or end-user preferences; and

• cooperation of software partners and semiconductor partners to support our chips within a system.

We cannot provide any assurance that products which we recently have developed or may develop in the future will achieve market acceptance. We have introduced to market or are in development of many ICs. If our ICs fail to achieve market acceptance, or if we fail to develop new products on a timely basis that achieve market acceptance, our growth prospects, operating results and competitive position could be adversely affected.

OUR RESEARCH AND DEVELOPMENT EFFORTS ARE FOCUSED ON A LIMITED NUMBER OF NEW TECHNOLOGIES AND PRODUCTS, AND ANY DELAY IN THE DEVELOPMENT, OR ABANDONMENT, OF THESE TECHNOLOGIES OR PRODUCTS BY INDUSTRY PARTICIPANTS, OR THEIR FAILURE TO ACHIEVE MARKET ACCEPTANCE, COULD COMPROMISE OUR COMPETITIVE POSITION

Our ICs are used as components in electronic devices in various markets. As a result, we have devoted and expect to continue to devote a large amount of resources to develop products based on new and emerging technologies and standards that will be commercially introduced in the future. Research and development expense for the three months ended April 2, 2005 was $19.0 million, or 18.1% of revenues. A number of large companies are actively involved in the development of these new technologies and standards. Should any of these companies delay or abandon their efforts to develop commercially available products based on new technologies and standards, our research and development efforts with respect to these technologies and standards likely would have no appreciable value. In addition, if we do not correctly anticipate new technologies and standards, or if the products that we develop based on these new technologies and standards fail to achieve market acceptance, our competitors may be better able to address market demand than we would. Furthermore, if markets for these new technologies and standards develop later than we anticipate, or do not develop at all, demand for our products that are currently in development would suffer, resulting in lower sales of these products than we currently anticipate. For example, we have introduced to market the Aero Transceiver product for use in wireless phones operating on the GSM/GPRS standard. We believe this market is now in the early stages of adopting the EDGE and WCDMA standards, which allow for enhanced data generation and transmission using mobile handsets. Forecasters expect the EDGE and WCDMA markets to develop and expand in 2005 and 2006. In July 2004, we extended our Aero family to meet the EDGE standard with the Aero EDGE Radio. However, we cannot be certain that the use of this technology will not change in the future and thereby make our products unsuitable. Furthermore, we cannot be certain that any product we develop for these standards will achieve market acceptance.

• protectionist laws and business practices that favor local competition in some countries;

• multiple, conflicting and changing laws, regulations and tax schemes;

• longer sales cycles;

• greater difficulty in accounts receivable collection and longer collection periods;

• high levels of distributor inventory subject to price protection and rights of return to us;

• political and economic instability;

• greater difficulty in hiring qualified technical sales and applications engineers and administrative personnel; and

• the need to have business and operations systems that can meet the need of our international business and structure.

To date, all of our sales to international customers and purchases of components from international suppliers have been denominated in U.S. dollars. As a result, an increase in the value of the U.S. dollar relative to foreign currencies could make our products more expensive for our international customers to purchase, thus rendering our products less competitive.

FAILURE TO MANAGE OUR DISTRIBUTION CHANNEL RELATIONSHIPS COULD IMPEDE OUR FUTURE GROWTH

The future growth of our business will depend in large part on our ability to manage our relationships with current and future distributors and sales representatives, develop additional channels for the distribution and sale of our products and manage these relationships. As we execute our indirect sales strategy, we must manage the potential conflicts that may arise with our direct sales efforts. For example, conflicts with a distributor may arise when a customer begins purchasing directly from us rather than through the distributor. The inability to successfully execute or manage a multi-channel sales strategy could impede our future growth. In addition, relationships with our distributors often involve the use of price protection and inventory return rights. This often requires a significant amount of sales management’s time and system resources to manage properly.

WE ARE SUBJECT TO INCREASED INVENTORY RISKS AND COSTS BECAUSE WE BUILD OUR PRODUCTS BASED ON FORECASTS PROVIDED BY CUSTOMERS BEFORE RECEIVING PURCHASE ORDERS FOR THE PRODUCTS

In order to ensure availability of our products for some of our largest customers, we start the manufacturing of our products in advance of receiving purchase orders based on forecasts provided by these customers. However, these forecasts do not represent binding purchase commitments and we do not recognize sales for these products until they are shipped to the customer. As a result, we incur inventory and manufacturing costs in advance of anticipated sales. Because demand for our products may not materialize, manufacturing based on forecasts subjects us to increased risks of high inventory carrying costs, increased obsolescence and increased operating costs. These inventory risks are exacerbated when our customers purchase indirectly through contract manufacturers or hold component inventory levels greater than their consumption rate because this causes us to have less visibility regarding the accumulated levels of inventory for such customers. A resulting write-off of unusable or excess inventories would adversely affect our operating results.

OUR PRODUCTS ARE COMPLEX AND MAY CONTAIN ERRORS WHICH COULD LEAD TO PRODUCT LIABILITY, AN INCREASE IN OUR COSTS AND/OR A REDUCTION IN OUR REVENUES

Our products are complex and may contain errors, particularly when first introduced or as new versions are released. We rely primarily on our in-house testing personnel to design test operations and procedures to detect any errors prior to delivery of our products to our customers. Because our products are manufactured by third parties, should problems occur in the operation or performance of our ICs, we may experience delays in meeting key introduction dates or scheduled delivery dates to our customers. These errors also could cause us to incur significant re-engineering costs, divert the attention of our engineering personnel from our product development efforts and cause significant customer relations and business reputation problems. Any defects could require product replacement or recall or we could be obligated to accept product returns. Any of the foregoing could impose substantial costs and harm our business.

Product liability claims may be asserted with respect to our products. Our products are typically sold at prices that are significantly lower than the cost of the end-products into which they are incorporated. A defect or failure in our product could cause failure in our customer’s end-product, so we could face claims for damages that are disproportionately higher than the revenues and profits we receive from the products involved. Furthermore, product liability risks are particularly significant with respect to medical and automotive applications because of the risk of serious harm to users of these products. There can be no assurance that any insurance we maintain will sufficiently protect us from any such claims.

An increasing number of our new product developments are being designed in even more complex processes. For example, our Aero II was designed in a ..13 micron complementary metal oxide semiconductor (CMOS) process, which adds cost, complexity and elements of experimentation and development, particularly in the area of advanced mixed-signal design.

OUR CUSTOMERS REQUIRE OUR PRODUCTS TO UNDERGO A LENGTHY AND EXPENSIVE QUALIFICATION PROCESS WITHOUT ANY ASSURANCE OF PRODUCT SALES

Prior to purchasing our products, our customers require that our products undergo an extensive qualification process, which involves testing of the products in the customer’s system as well as rigorous reliability testing. This qualification process may continue for six months or longer. However, qualification of a product by a customer does not ensure any sales of the product to that customer. Even after successful qualification and sales of a product to a customer, a subsequent revision to the IC, changes in its manufacturing process or the selection of a new supplier by us may require a new qualification process, which may result in delays and in us holding excess or obsolete inventory. After our products are qualified, it can take an additional six months or more before the customer commences volume production of components or devices that incorporate our products. We are experiencing this lengthy introduction to volume production cycle time with our CMOS Power Amplifier, which was introduced in the early part of fiscal 2004 and is not expected to contribute to our revenues prior to the second half of fiscal 2005. Despite these uncertainties, we devote substantial resources, including design, engineering, sales, marketing and management efforts, toward qualifying our products with customers in anticipation of sales. If we are unsuccessful or delayed in qualifying any of our products with a customer, such failure or delay would preclude or delay sales of such product to the customer, which may impede our growth and cause our business to suffer.

WE RELY ON THIRD PARTIES TO MANUFACTURE, ASSEMBLE AND TEST OUR PRODUCTS AND THE FAILURE TO SUCCESSFULLY MANAGE OUR RELATIONSHIPS WITH OUR MANUFACTURERS AND SUBCONTRACTORS WOULD NEGATIVELY IMPACT OUR ABILITY TO SELL OUR PRODUCTS

We do not have our own wafer fab manufacturing facilities. Therefore, we rely principally on one third-party vendor, Taiwan Semiconductor Manufacturing Co. (TSMC), to manufacture the ICs we design. We also currently rely principally on two offshore third-party assembly subcontractors, Advanced Semiconductor Engineering (ASE) and Amkor Technology, to assemble and package the silicon chips provided by the wafers for use in final products. Additionally, we rely on these offshore subcontractors for a substantial portion of the testing requirements of our products prior to shipping. Although we also maintain testing facilities in Austin, Texas, we have increasingly utilized offshore third-party test subcontractors, typically in Asia, where the parts are assembled and where the products are frequently delivered to our customers. We expect utilization of offshore third-party test subcontractors to continue in the future.

The cyclical nature of the semiconductor industry drives wide fluctuations in available capacity at third-party vendors. On occasion, we have been unable to adequately respond to unexpected increases in customer demand due to capacity constraints and, therefore, were unable to benefit from this incremental demand. We may be unable to obtain adequate foundry, assembly or test capacity from our third-party subcontractors to meet our customers’ delivery requirements even if we adequately forecast customer demand.

There are significant risks associated with relying on these third-party foundries and subcontractors, including:

• failure by us, our customers or their end customers to qualify a selected supplier;

• potential insolvency of the third-party subcontractors;

• reduced control over delivery schedules and quality;

• limited warranties on wafers or products supplied to us;

• potential increases in prices;

• increased need for international-based supply, logistics and financial management;

• their inability to supply or support new or changing packaging technologies; and

• low test yields.

We typically do not have long-term supply contracts with our third-party vendors which obligate the vendor to perform services and supply products to us for a specific period, in specific quantities, and at specific prices. Our third-party foundry, assembly and test subcontractors typically do not guarantee that adequate capacity will be available to us within the time required to meet demand for our products. In the event that these vendors fail to meet our demand for whatever reason, we expect that it would take up to twelve months to transition performance of these services to new providers. Such a transition may also require qualification of the new providers by our customers or their end customers.

Since our inception, substantially all of the silicon wafers for the products that we have shipped were manufactured either by TSMC or its affiliates. Our customers typically complete their own qualification process. If we fail to properly balance customer demand across the existing semiconductor fabrication facilities that we utilize or are required by our foundry partners to increase, or otherwise change the number of fab lines that we utilize for our production, we might not be able to fulfill demand for our products and may need to divert our engineering resources away from new product development initiatives to support the fab line transition, which would adversely affect our operating results.

OUR INABILITY TO MANAGE GROWTH COULD MATERIALLY AND ADVERSELY AFFECT OUR BUSINESS

In recent periods, we have significantly increased the scope of our operations and expanded our workforce from 486 employees at the end of fiscal 2003 to 595 employees at April 2, 2005. This growth has placed, and any future growth of our operations will continue to place, a significant strain on our management personnel, systems and resources. We anticipate that we will need to implement a variety of new and upgraded sales, operational and financial enterprise-wide systems, information technology infrastructure, procedures and controls, including the improvement of our accounting and other internal management systems to manage this growth and maintain compliance with regulatory guidelines, including Sarbanes-Oxley Act requirements. While we believe that we are in compliance with all Sarbanes-Oxley Act requirements today, as our business grows our internal management systems and processes will need to improve to ensure that we remain in compliance. We also expect that we will need to continue to expand, train, manage and motivate our workforce. All of these endeavors will require substantial management effort, and we anticipate that we will require additional management personnel and internal processes to manage these efforts and to plan for the succession from time to time of certain persons who have been key management and technical personnel. If we are unable to effectively manage our expanding global operations, our business could be materially and adversely affected.

WE DEPEND ON OUR KEY PERSONNEL TO MANAGE OUR BUSINESS EFFECTIVELY IN A RAPIDLY CHANGING MARKET, AND IF WE ARE UNABLE TO RETAIN OUR CURRENT PERSONNEL AND HIRE ADDITIONAL PERSONNEL, OUR ABILITY TO DEVELOP AND SUCCESSFULLY MARKET OUR PRODUCTS COULD BE HARMED

We believe our future success will depend in large part upon our ability to attract and retain highly skilled managerial, engineering, sales and marketing personnel. We believe that our future success will be dependent on retaining the services of our key personnel, developing their successors and certain internal processes to reduce our reliance on specific individuals, and on properly managing the transition of key roles when they occur. There is currently a shortage of qualified personnel with significant experience in the design, development, manufacturing, marketing and sales of analog and mixed-signal ICs. In particular, there is a shortage of engineers who are familiar with the intricacies of the design and manufacturability of analog elements, and competition for such personnel is intense. Our key technical personnel represent a significant asset and serve as the primary source for our technological and product innovations. We may not be successful in attracting and retaining sufficient numbers of technical personnel to support our anticipated growth. The loss of any of our key employees or the inability to attract or retain qualified personnel both in the United States and internationally, including engineers and sales and marketing personnel, could delay the development and introduction of, and negatively impact our ability to sell, our products.

ANY ACQUISITIONS WE MAKE COULD DISRUPT OUR BUSINESS AND HARM OUR FINANCIAL CONDITION

As part of our growth and product diversification strategy, we continue to evaluate opportunities to acquire other businesses, intellectual property or technologies that would complement our current offerings, expand the breadth of our markets or enhance our technical capabilities. The Cygnal acquisition and other acquisitions that we may potentially make in the future entail a number of risks that could materially and adversely affect our business and operating results, including:

• problems integrating the acquired operations, technologies or products with our existing business and products;

• diversion of management’s time and attention from our core business;

• need for financial resources above our planned investment levels;

• difficulties in retaining business relationships with suppliers and customers of the acquired company;

• risks associated with entering markets in which we lack prior experience;

• risks associated with the transfer of licenses of intellectual property;

• potential loss of key employees of the acquired company; and

• potential impairment of related goodwill and intangible assets.

In connection with the Cygnal acquisition, we are obligated to potentially issue up to a maximum of 1,290,963 additional shares of our common stock based upon the achievement of product revenue milestones (of which approximately 369,000 shares have been issued thus far), which could distract our management and employees and lead to disputes with former Cygnal stockholders. Future acquisitions also could cause us to incur debt or contingent liabilities or cause us to issue equity securities that could negatively impact the ownership percentages of existing shareholders.

OUR STOCK PRICE MAY BE VOLATILE

The market price of our common stock has been volatile in the past and may be volatile in the future. The market price of our common stock may be significantly affected by the following factors:

• actual or anticipated fluctuations in our operating results;

• changes in financial estimates by securities analysts or our failure to perform in line with such estimates;

• changes in market valuations of other technology companies, particularly semiconductor companies;

• announcements by us or our competitors of significant technical innovations, acquisitions, strategic partnerships, joint ventures or capital commitments;

• introduction of technologies or product enhancements that reduce the need for our products;

• the loss of, or decrease in sales to, one or more key customers;

• a large sale of stock by a significant shareholder;

• dilution from the issuance of our stock in connection with acquisitions;

• departures of key personnel; and

• the required expensing of stock options under FASB SFAS 123 (revised 2004), “Share-Based Payment”.

The stock market has experienced extreme volatility that often has been unrelated to the performance of particular companies. These market fluctuations may cause our stock price to fall regardless of our performance.

MOST OF OUR CURRENT MANUFACTURERS, ASSEMBLERS, TEST SERVICE PROVIDERS, AND CUSTOMERS ARE CONCENTRATED IN THE SAME GEOGRAPHIC REGION, WHICH INCREASES THE RISK THAT A NATURAL DISASTER, EPIDEMIC, LABOR STRIKE, WAR OR POLITICAL UNREST COULD DISRUPT OUR OPERATIONS OR SALES

Most of our current semiconductor wafer manufacturer’s foundries and one of our assembly and test subcontractor’s sites are primarily located in the same region within Taiwan and our other assembly and test subcontractors are located in the Pacific Rim region. In addition, many of our customers, particularly mobile handset manufacturers, are located in the Pacific Rim region. The risk of earthquakes in Taiwan and the Pacific Rim region is significant due to the proximity of major earthquake fault lines in the area. We are not currently covered by insurance against business disruption caused by earthquakes as such insurance is not currently available on terms that we believe are commercially reasonable. Earthquakes, fire, flooding, lack of water or other natural disasters in Taiwan or the Pacific Rim region, or an epidemic, political unrest, war, labor strikes or work stoppages in countries where our semiconductor manufacturer, assemblers and test subcontractors are located, likely would result in the disruption of our foundry, assembly or test capacity. There can be no assurance that such alternate capacity could be obtained on favorable terms, if at all.

A natural disaster, epidemic, labor strike, war or political unrest where our customers’ facilities are located would likely reduce our sales to such customers. For example, Samsung, our largest customer, is based in South Korea and represented 18% of our revenues during the first three months of fiscal 2005. North Korea’s decision to withdraw from the nuclear Non-Proliferation Treaty and related geopolitical maneuverings have created unrest. Such unrest could create economic uncertainty or instability, could escalate to war or otherwise adversely affect South Korea and our South Korean customers and reduce our sales to such customers, which would materially and adversely affect our operating results. In addition, a significant portion of the assembly and testing of our mobile handset products occurs in South Korea. Any disruption resulting from these events could also cause significant delays in shipments of our products until we are able to shift our manufacturing, assembling or testing from the affected subcontractor to another third-party vendor.

WE MAY BE UNABLE TO PROTECT OUR INTELLECTUAL PROPERTY, WHICH WOULD NEGATIVELY AFFECT OUR ABILITY TO COMPETE

Our products rely on our proprietary technology, and we expect that future technological advances made by us will be critical to sustain market acceptance of our products. Therefore, we believe that the protection of our intellectual property rights is and will continue to be important to the success of our business. We rely on a combination of patent, copyright, trademark and trade secret laws and restrictions on disclosure to protect our intellectual property rights. We also enter into confidentiality or license agreements with our employees, consultants, intellectual property providers and business partners, and control access to and distribution of our documentation and other proprietary information. Despite these efforts, unauthorized parties may attempt to copy or otherwise obtain and use our proprietary technology. Monitoring unauthorized use of our technology is difficult, and we cannot be certain that the steps we have taken will prevent unauthorized use of our technology, particularly in foreign countries where the laws may not protect our proprietary rights as fully as in the United States. We cannot be certain that patents will be issued as a result of our pending applications nor can we be certain that any issued patents would protect or benefit us or give us adequate protection from competing products. For example, issued patents may be circumvented or challenged and declared invalid or unenforceable. We also cannot be certain that others will not develop effective competing technologies on their own.

THE SEMICONDUCTOR MANUFACTURING PROCESS IS HIGHLY COMPLEX AND, FROM TIME TO TIME, MANUFACTURING YIELDS MAY FALL BELOW OUR EXPECTATIONS, WHICH COULD RESULT IN OUR INABILITY TO SATISFY DEMAND FOR OUR PRODUCTS IN A TIMELY MANNER

The manufacture of our products is a highly complex and technologically demanding process. Although we work closely with our foundries to minimize the likelihood of reduced manufacturing yields, our foundries from time to time have experienced lower than anticipated manufacturing yields. Changes in manufacturing processes or the inadvertent use of defective or contaminated materials by our foundries could result in lower than anticipated manufacturing yields or unacceptable performance deficiencies. If our foundries fail to deliver fabricated silicon wafers of satisfactory quality in a timely manner, we will be unable to meet our customers’ demand for our products in a timely manner, which would adversely affect our operating results and damage our customer relationships.

WE DEPEND ON OUR CUSTOMERS TO SUPPORT OUR PRODUCTS, AND SOME OF OUR CUSTOMERS OFFER COMPETING PRODUCTS

Our products are currently used by our customers to produce modems, telephony equipment, mobile handsets, networking equipment and a broad range of other devices. We rely on our customers to provide hardware, software, intellectual property indemnification and other technical support for the products supplied by our customers. If our customers do not provide the required functionality or if our customers do not provide satisfactory support for their products, the demand for these devices that incorporate our products may diminish or we may otherwise be materially adversely affected. Any reduction in the demand for these devices would significantly reduce our revenues.

In certain products such as the DAA, some of our customers (including Agere Systems and Conexant) offer their own competitive products. These customers may find it advantageous to support their own offerings in the marketplace in lieu of promoting our products.

SIGNIFICANT LITIGATION OVER INTELLECTUAL PROPERTY IN OUR INDUSTRY MAY CAUSE US TO BECOME INVOLVED IN COSTLY AND LENGTHY LITIGATION WHICH COULD SERIOUSLY HARM OUR BUSINESS

In recent years, there has been significant litigation in the United States involving patents and other intellectual property rights. From time to time, we receive letters from various industry participants alleging infringement of patents, trademarks or misappropriation of trade secrets or from customers requesting indemnification for claims brought against them by third parties. The exploratory nature of these inquiries has become relatively common in the semiconductor industry. We respond when appropriate and as advised by legal counsel. We have been involved in litigation to protect our intellectual property rights in the past and may become involved in such litigation again in the future. For example, in April 2003, we paid $17 million to settle patent infringement claims brought against us by TDK Semiconductor Corporation (TDK). In February 2004, we filed a lawsuit against a former employee and Axiom Microdevices alleging theft of trade secrets. In September 2004, we added claims for patent infringement to such suit. In the future, we may become involved in additional litigation to defend allegations of infringement asserted by others, both directly and indirectly as a result of certain industry-standard indemnities we may offer to our customers. Legal proceedings could subject us to significant liability for damages or invalidate our proprietary rights. Legal proceedings initiated by us to protect our intellectual property rights could also result in counterclaims or countersuits against us. Any litigation, regardless of its outcome, would likely be time-consuming and expensive to resolve and would divert our management’s time and attention. Most intellectual property litigation also could force us to take specific actions, including:

• cease selling products that use the challenged intellectual property;

• obtain from the owner of the infringed intellectual property a right to a license to sell or use the relevant technology, which license may not beavailable on reasonable terms, or at all;

• redesign those products that use infringing intellectual property; or

• pursue legal remedies with third parties to enforce our indemnification rights, which may not adequately protect our interests.

WE COULD SEEK TO RAISE ADDITIONAL CAPITAL IN THE FUTURE THROUGH THE ISSUANCE OF EQUITY OR DEBT SECURITIES, BUT ADDITIONAL CAPITAL MAY NOT BE AVAILABLE ON TERMS ACCEPTABLE TO US, OR AT ALL

We believe that our existing cash, cash equivalents and investments will be sufficient to meet our working capital needs, capital expenditures, investment requirements and commitments for at least the next 12 months. However, it is possible that we may need to raise additional funds to finance our activities or to facilitate acquisitions of other businesses, products, intellectual property or technologies. We believe we could raise these funds, if needed, by selling equity or debt securities to the public or to selected investors. In addition, even though we may not need additional funds, we may still elect to sell additional equity or debt securities or obtain credit facilities for other reasons. However, we may not be able to obtain additional funds on favorable terms, or at all. If we decide to raise additional funds by issuing equity or convertible debt securities, the ownership percentages of existing shareholders would be reduced.

WE ARE A RELATIVELY SMALL COMPANY WITH LIMITED RESOURCES COMPARED TO SOME OF OUR CURRENT AND POTENTIAL COMPETITORS AND WE MAY NOT BE ABLE TO COMPETE EFFECTIVELY AND INCREASE MARKET SHARE

Some of our current and potential competitors have longer operating histories, significantly greater resources and name recognition and a larger base of customers than we have. As a result, these competitors may have greater credibility with our existing and potential customers. They also may be able to adopt more aggressive pricing policies and devote greater resources to the development, promotion and sale of their products than we can to ours. In addition, some of our current and potential competitors have already established supplier or joint development relationships with the decision makers at our current or potential customers. These competitors may be able to leverage their existing relationships to discourage their customers from purchasing products from us or persuade them to replace our products with their products. Our competitors may also offer bundled chipset kit arrangements offering a more complete product despite the technical merits or advantages of our products. These competitors may elect not to support our products which could complicate our sales efforts. These and other competitive pressures may prevent us from competing successfully against current or future competitors, and may materially harm our business. Competition could decrease our prices, reduce our sales, lower our gross profits or decrease our market share.

PROVISIONS IN OUR CHARTER DOCUMENTS AND DELAWARE LAW COULD PREVENT, DELAY OR IMPEDE A CHANGE IN CONTROL OF US AND MAY REDUCE THE MARKET PRICE OF OUR COMMON STOCK

Provisions of our certificate of incorporation and bylaws could have the effect of discouraging, delaying or preventing a merger or acquisition that a stockholder may consider favorable. For example, our certificate of incorporation and bylaws provide for:

• the division of our board of directors into three classes to be elected on a staggered basis, one class each year;

• the ability of our board of directors to issue shares of our preferred stock in one or more series without further authorization of our stockholders;

• a prohibition on stockholder action by written consent;

• elimination of the right of stockholders to call a special meeting of stockholders;

• a requirement that stockholders provide advance notice of any stockholder nominations of directors or any proposal of new business to be considered at any meeting of stockholders; and

• a requirement that a supermajority vote be obtained to amend or repeal certain provisions of our certificate of incorporation.

We also are subject to the anti-takeover laws of Delaware which may discourage, delay or prevent someone from acquiring or merging with us, which may adversely affect the market price of our common stock.

WE ARE SUBJECT TO CREDIT RISKS RELATED TO OUR ACCOUNTS RECEIVABLE, ESPECIALLY WHEN OVERSEAS CUSTOMERS PURCHASE OUR PRODUCTS

We do not generally obtain letters of credit or other security for payment from customers, distributors or contract manufacturers. Accordingly, we are not protected against accounts receivable default or bankruptcy by these entities. If we are unable to collect our accounts receivable, our operating results could be materially harmed.

THE PERFORMANCE OF OUR DSL ANALOG FRONT END (AFE) AND MODEM RELATED PRODUCTS MAY BE ADVERSELY AFFECTED BY SEVERE ENVIRONMENTAL CONDITIONS THAT MAY REQUIRE MODIFICATIONS, WHICH COULD LEAD TO AN INCREASE IN OUR COSTS OR A REDUCTION IN OUR REVENUES

Although our DSL AFE and modem related products are compliant with published specifications, these established specifications might not adequately address all conditions that must be satisfied in order to operate in harsh environments. This includes environments where there are wide variations in electrical quality, telephone line quality, static electricity and operating temperatures or that may be affected by lightning or improper handling by customers and end users. These environmental factors may result in unanticipated returns of our products. Any necessary modifications could cause us to incur significant re-engineering costs, divert the attention of our engineering personnel from our product development efforts and cause significant customer relations and business reputation problems.

RISKS RELATED TO OUR INDUSTRY

WE ARE SUBJECT TO THE CYCLICAL NATURE OF THE SEMICONDUCTOR INDUSTRY, WHICH HAS BEEN SUBJECT TO SIGNIFICANT FLUCTUATIONS

The semiconductor industry is highly cyclical and is characterized by constant and rapid technological change, rapid product obsolescence and price erosion, evolving standards, short product life cycles and wide fluctuations in product supply and demand. The industry has experienced significant fluctuations, often connected with, or in anticipation of, maturing product cycles and new product introductions of both semiconductor companies’ and their customers’ products and fluctuations in general economic conditions.

Downturns have been characterized by diminished product demand, production overcapacity, high inventory levels and accelerated erosion of average selling prices. For example, in fiscal 2001, the semiconductor industry suffered a downturn due to reductions in the actual unit sales of personal computers and wireless phones as compared to previous robust forecasts. This downturn resulted in a material adverse effect on our business and operating results in fiscal 2001.

Upturns have been characterized by increased product demand and production capacity constraints created by increased competition for access to third-party foundry, assembly and test capacity. We are dependent on the availability of such capacity to manufacture, assemble and test our ICs. None of our third-party foundry, assembly or test subcontractors have provided assurances that adequate capacity will be available to us.

THE AVERAGE SELLING PRICES OF OUR PRODUCTS COULD DECREASE RAPIDLY WHICH MAY NEGATIVELY IMPACT OUR REVENUES AND GROSS PROFITS

We may experience substantial period-to-period fluctuations in future operating results due to the erosion of our average selling prices, particularly for mobile handset products. We have reduced the average unit price of our products in anticipation of or in response to competitive pricing pressures, new product introductions by us or our competitors and other factors. If we are unable to offset any such reductions in our average selling prices by increasing our sales volumes and reducing production costs, our gross profits and revenues will suffer. To maintain our gross profit percentage, we will need to develop and introduce new products and product enhancements on a timely basis and continually reduce our costs. Our failure to do so would cause our revenues and gross profit percentage to decline.

COMPETITION WITHIN THE NUMEROUS MARKETS WE TARGET MAY REDUCE SALES OF OUR PRODUCTS AND REDUCE MARKET SHARE

The markets for semiconductors in general, and for mixed-signal ICs in particular, are intensely competitive. We expect that the market for our products will continually evolve and will be subject to rapid technological change. In addition, as we target and supply products to numerous markets and applications, we face competition from a relatively large number of competitors. Across all of our product areas, we compete with Agere Systems, Atmel, AMCC, Analog Devices, Broadcom, Conexant, Cypress, ESS, Freescale, Fujitsu, Infineon Technologies, Legerity, Maxim Integrated Products, Microchip, National Semiconductor, Philips, Renesas, RF Micro Devices, Semtech, Skyworks Solutions, Texas Instruments, Vitesse Semiconductor and others. We expect to face competition in the future from our current competitors, other manufacturers and designers of semiconductors, and start-up semiconductor design companies. Some of our customers, such as Agere Systems, Broadcom, Intel, Motorola, Samsung and Texas Instruments, are also large, established semiconductor suppliers. Our sales to and support of these customers may enable them to become a source of competition to us, despite our efforts to protect our intellectual property rights. As the markets for communications products grow, we also may face competition from traditional communications device companies. These companies may enter the mixed-signal semiconductor market by introducing their own ICs or by entering into strategic relationships with or acquiring other existing providers of semiconductor products.

In addition, large companies may restructure their operations to create separate companies or may acquire new businesses that are focused on providing the types of products we produce or acquire our customers. For example, in May 2003, Conexant acquired PC-Tel’s modem business. Conexant has sought, and will likely continue to seek, to supplant our silicon DAA products that have been incorporated in PC-Tel products with Conexant’s own competing DAA product. In 2004, Motorola separated its semiconductor operations into Freescale Semiconductor, a publicly traded company focused on communications and integrated electronic systems. As an additional example, in February 2004, Conexant and GlobespanVirata merged to form a company focused on communication semiconductors. This combined entity will focus on all broadband applications and may compete with our DAA, ISOmodem and asymmetric digital subscriber line (ADSL) product lines.

OUR PRODUCTS MUST CONFORM TO INDUSTRY STANDARDS AND TECHNOLOGY IN ORDER TO BE ACCEPTED BY END USERS IN OUR MARKETS

Generally, our products comprise only a part of a device. All components of such devices must uniformly comply with industry standards in order to operate efficiently together. We depend on companies that provide other components of the devices to support prevailing industry standards. Many of these companies are significantly larger and more influential in affecting industry standards than we are. Some industry standards may not be widely adopted or implemented uniformly, and competing standards may emerge that may be preferred by our customers or end users. If larger companies do not support the same industry standards that we do, or if competing standards emerge, market acceptance of our products could be adversely affected which would harm our business.

Products for communications applications are based on industry standards that are continually evolving. For example, GSM mobile handsets now commonly use the GPRS specification for enabling data communications. Certain suppliers are now offering mobile handset devices utilizing the WCDMA protocol to support higher data communication rates on WCDMA networks. We do not currently have a WCDMA mobile handset product. Other suppliers, including us, are now offering mobile handset devices utilizing the EDGE protocol to support higher data communication rates on GSM networks. Our ability to compete in the future will depend on our ability to identify and ensure compliance with these evolving industry standards. The emergence of new industry standards could render our products incompatible with products developed by other suppliers. As a result, we could be required to invest significant time and effort and to incur significant expense to redesign our products to ensure compliance with relevant standards. If our products are not in compliance with prevailing industry standards for a significant period of time, we could miss opportunities to achieve crucial design wins.

Our pursuit of necessary technological advances may require substantial time and expense. We may not be successful in developing or using new technologies or in developing new products or product enhancements that achieve market acceptance. If our ICs fail to achieve market acceptance, our growth prospects, operating results and competitive position could be adversely affected.

PART II. OTHER INFORMATION

ITEM 1. LEGAL PROCEEDINGS

SECURITIES LITIGATION

On December 6, 2001, a class action complaint for violations of U.S. federal securities laws was filed in the United States District Court for the Southern District of New York against us, four of our officers individually and the three investment banking firms who served as representatives of the underwriters in connection with our initial public offering of common stock. The Consolidated Amended Complaint alleges that the registration statement and prospectus for our initial public offering did not disclose that (1) the underwriters solicited and received additional, excessive and undisclosed commissions from certain investors, and (2) the underwriters had agreed to allocate shares of the offering in exchange for a commitment from the customers to purchase additional shares in the aftermarket at pre-determined higher prices. The action seeks damages in an unspecified amount and is being coordinated with approximately 300 other nearly identical actions filed against other companies. A court order dated October 9, 2002 dismissed without prejudice our four officers who had been named individually. On February 19, 2003, the Court denied the motion to dismiss the complaint against us. On October 13, 2004, the Court certified a class in six of the approximately 300 other nearly identical actions and noted that the decision is intended to provide strong guidance to all parties regarding class certification in the remaining cases. Plaintiffs have not yet moved to certify a class in the Silicon Laboratories case. We have approved a settlement agreement and related agreements which set forth the terms of a settlement between us, the plaintiff class and the vast majority of the other approximately 300 issuer defendants. Among other provisions, the settlement provides for a release of us and the individual defendants for the conduct alleged in the action to be wrongful. We would agree to undertake certain responsibilities, including agreeing to assign away, not assert, or release certain potential claims we may have against our underwriters. The settlement agreement also provides a guaranteed recovery of $1 billion to plaintiffs for the cases relating to all of the approximately 300 issuers. To the extent that the underwriter defendants settle all of the cases for at least $1 billion, no payment will be required under the issuers’ settlement agreement. To the extent that the underwriter defendants settle for less than $1 billion, the issuers are required to make up the difference. We anticipate that our potential financial obligation to plaintiffs pursuant to the terms of the settlement agreement and related agreements will be covered by existing insurance. We are not aware of any material limitations on the expected recovery of any potential financial obligation to plaintiffs from our insurance carriers. Our carriers appear to be solvent, and we are not aware of any uncertainties as to the legal sufficiency of an insurance claim with respect to any recovery by plaintiffs. Therefore, we do not expect that the settlement would involve any material payment by us. Furthermore, even if our insurance were unavailable due to insurer insolvency or otherwise, we expect that our maximum financial obligation to plaintiffs pursuant to the settlement agreement would be less than $3.4 million. On February 15, 2005, the Court granted preliminary approval of the settlement agreement, subject to certain modifications consistent with its opinion. The Court ruled that the issuer defendants and the plaintiffs must submit a revised settlement agreement which provides for a mutual bar of all contribution claims by the settling and non-settling parties and does not bar the parties from pursuing other claims. The issuers and plaintiffs have negotiated a revised settlement agreement consistent with the Court’s opinion and are in the process of obtaining approval from those issuer defendants that are not in bankruptcy and the individuals associated with those issuers. Based on the current Court schedule (which is subject to change), the parties must submit a revised settlement to the Court by May 2, 2005 and the underwriter defendants would have until May 16, 2005 to object to the revised settlement agreement. There is no assurance that the Court will grant final approval to the settlement. If the settlement agreement is not approved and we are found liable, we are unable to estimate or predict the potential damages that might be awarded, whether such damages would be greater than our insurance coverage, or whether the outcome would have a material impact on our results of operations or financial position.

TRADE SECRET AND PATENT INFRINGEMENT LITIGATION

On February 17, 2004, we filed a lawsuit against a former employee and Axiom Microdevices Inc., a California corporation, in the United States District Court for the Western District of Texas, Austin Division, alleging theft of trade secrets by the individual and Axiom. The lawsuit also alleges that the employee breached his ethical, contractual and fiduciary obligations to us by disclosing trade secrets and confidential information to Axiom and that Axiom tortiously interfered with the employee’s contractual obligations to us. On September 14, 2004, we added claims for infringement of United States Patents 6,549,071 and 6,788,141 to the pending suit. The patents relate to our proprietary technology for CMOS RF power amplifiers. At this time, we cannot estimate the outcome of this matter or resulting financial impact to us, if any.

OTHER LITIGATION

We are involved in various other legal proceedings that have arisen in the normal course of business. While the ultimate results of these matters cannot be predicted with certainty, we do not expect them to have a material adverse effect on the consolidated financial position or results of operations.

ITEM 2. UNREGISTERED SALES OF EQUITY SECURITIES AND USE OF PROCEEDS

Our registration statement (Registration No. 333-94853) under the Securities Act of 1933, as amended, relating to our initial public offering of our common stock became effective on March 23, 2000. A total of 3,680,000 shares of common stock were registered. We sold a total of 3,200,000 shares of our common stock and selling stockholders sold a total of 480,000 shares to an underwriting syndicate. The managing underwriters were Morgan Stanley & Co. Incorporated, Lehman Brothers Inc., and Salomon Smith Barney Inc. The offering commenced and was completed on March 24, 2000, at a price to the public of $31.00 per share. The initial public offering resulted in net proceeds to us of $90.6 million, after deducting underwriting commissions of $6.9 million and offering expenses of $1.6 million. We used $15 million of the proceeds as part of the consideration paid in the acquisition of Krypton Isolation, Inc. on August 9, 2000. Another $4.3 million was used to pay off equipment loans provided by Imperial Bank. We used another $1.0 million of the proceeds as part of the consideration paid in the acquisition of SNR Semiconductor Incorporated (SNR) on October 2, 2000. In December 2002, we prepaid $2.4 million in satisfaction of our remaining debt and lease obligations to three equipment financing institutions. In December 2003, we paid $0.9 million in direct acquisition costs for professional and legal fees related to the acquisition of Cygnal. As of April 2, 2005, the remaining proceeds were invested in cash, cash equivalents and short-term investments.

The following table summarizes repurchases of our stock in the three months ended April 2, 2005:

Period	Total Number of Shares Purchased	Average Price Paid per Share		Number of Shares Purchased as Part of Publicly Announced Plans or Programs	Maximum Number (or Approximate Dollar Value) of Shares that May Yet Be Purchased Under the Plans or Programs
1/2/05 – 1/29/05	800	$	0.0001	N/A	N/A

1/30/05 – 2/26/05	—	N/A		N/A	N/A

2/27/05 – 4/2/05	1,600	$	0.0001	N/A	N/A

Total	2,400	$	0.0001	N/A	N/A

The 2,400 shares were purchased from employees upon termination of service pursuant to the terms of stock issuance agreements which permit us to elect to purchase such shares at the original issuance price.

ITEM 3. DEFAULTS UPON SENIOR SECURITIES

Not applicable

ITEM 4. SUBMISSION OF MATTERS TO A VOTE OF SECURITY HOLDERS

Not applicable

ITEM 5. OTHER INFORMATION

Not applicable

ITEM 6. EXHIBITS

The following exhibits are filed as part of this report:

Exhibit
Number

2.	1*	Agreement and Plan of Reorganization, dated September 25, 2003, by and among Silicon Laboratories Inc., Homestead Enterprises, Inc., and Cygnal Integrated Products, Inc. (filed as Exhibit 2.1 to the Form 8-K filed October 3, 2003).

3.	1*	Form of Fourth Amended and Restated Certificate of Incorporation of Silicon Laboratories Inc. (filed as Exhibit 3.1 to the Registrant’s Registration Statement on Form S-1 (Securities and Exchange Commission File No. 333-94853) (the “IPO Registration Statement”))

3.	2*	Second Amended and Restated Bylaws of Silicon Laboratories Inc (filed as Exhibit 3.2 to the Registrant’s Annual Report on Form 10-K for the fiscal year ended January 3, 2004).

4.	1*	Specimen certificate for shares of common stock (filed as Exhibit 4.1 to the IPO Registration Statement).

31.	1	Certification of the Principal Executive Officer, as required by Section 302 of the Sarbanes-Oxley Act of 2002.

31.	2	Certification of the Principal Accounting Officer, as required by Section 302 of the Sarbanes-Oxley Act of 2002.

32.	1	Certification as required by Section 906 of the Sarbanes-Oxley Act of 2002

* Incorporated herein by reference to the indicated filing.


		SILICON LABORATORIES INC. (Registrant)


April 25, 2005		/s/ Navdeep S. Sooch
Date		Navdeep S. Sooch
		INTERIM CHIEF EXECUTIVE OFFICER AND CHAIRMAN OF THE BOARD (PRINCIPAL EXECUTIVE OFFICER)


April 25, 2005		/s/ Russell J. Brennan
Date		Russell J. Brennan
		VICE PRESIDENT AND CHIEF FINANCIAL OFFICER (PRINCIPAL ACCOUNTING OFFICER)