Exhibit 3.1

AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

INTEGRATED SILICON SOLUTION, INC.

ARTICLE 1

The name of the Corporation is Integrated Silicon Solution, Inc. (the “Corporation”).

ARTICLE 2

The address of the Corporation’s registered office in the State of Delaware is 1209 Orange Street, in the City of Wilmington, 19801, County of New Castle. The name of its registered agent at such address is The Corporation Trust Company.

ARTICLE 3

The nature of the business of the Corporation and the objects or purposes to be transacted, promoted or carried on by it are as follows: To engage in any lawful act or activity for which corporations may be organized under the General Corporation Law of the State of Delaware.

ARTICLE 4

The total number of shares of all classes of stock that the Corporation is authorized to issue is one thousand (1,000) shares of Common Stock with a par value of $0.001 per share.

ARTICLE 5

The Board of Directors is expressly authorized to adopt, amend and repeal the Bylaws of the Corporation.

ARTICLE 6

Elections of directors need not be by written ballot unless the Bylaws of the Corporation shall so provide.

ARTICLE 7

Whenever a compromise or arrangement is proposed between the Corporation and its creditors or any class of them and/or between the Corporation and its stockholders or any class of them,

any court of equitable jurisdiction within the State of Delaware may, on the application in a summary way of the Corporation or of any creditor or stockholder thereof on the application of any receiver or receivers appointed for the Corporation under the provisions of Section 291 of Delaware General Corporation Law or on the application of trustees in dissolution or of any receiver or receivers appointed for the Corporation under the provisions of Section 279 of Delaware General Corporation Law order a meeting of the creditors or class of creditors, and/or of the stockholders or class of stockholders of the Corporation, as the case may be, to be summoned in such manner as the said court directs. If a majority in number representing three-fourths in value of the creditors or class of creditors, and/or of the stockholders or class of stockholders of the Corporation, as the case may be, agree to any compromise or arrangement and to any reorganization of the Corporation as a consequence of such compromise or arrangement, the said compromise or arrangement and the said reorganization shall, if sanctioned by the court to which the said application has been made, be binding on all the creditors or class of creditors, and/or on all the stockholders or class of stockholders, of the Corporation, as the case may be, and also on the Corporation.

ARTICLE 8

To the fullest extent permitted by the Delaware General Corporation Law, as the same exists or as may hereafter be amended, a director of the Corporation shall not be personally liable to the Corporation or its stockholders for monetary damages for breach of fiduciary duty as a director. If the Delaware General Corporation Law is amended to authorize corporate action further eliminating or limiting the personal liability of directors, then the liability of the directors shall be eliminated or limited to the fullest extent permitted by the Delaware General Corporation Law, as so amended. The elimination and limitation of liability provided herein shall continue after a director has ceased to occupy such position as to acts or omissions occurring during such director’s term or terms of office.

The Corporation may indemnify to the fullest extent permitted by law any person made or threatened to be made a party to an action or proceeding, whether criminal, civil, administrative or investigative, by reason of the fact that he, his testator or intestate is or was a director, officer, or employee of the Corporation or any predecessor of the Corporation or serves or served at any other enterprise as a director, officer, or employee at the request of the Corporation or any predecessor to the Corporation.

Neither any amendment, repeal or modification of this Article 8, nor the adoption of any provision of this Corporation’s Certificate of Incorporation inconsistent with this Article 8, shall eliminate or reduce the effect of this Article 8, in respect of any matter occurring, or any action or Proceeding accruing or arising or that, but for this Article 8, would accrue or arise, prior to such amendment, repeal or adoption of an inconsistent provision.

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ARTICLE 9

The Corporation reserves the right to amend, alter, change or repeal any provision contained in this Certificate of Incorporation, in the manner now or hereafter prescribed by statute, and all rights conferred upon stockholders herein are granted subject to this reservation.

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