UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

WASHINGTON, D.C. 20549

FORM 8-K

CURRENT REPORT

Pursuant to Section 13 or 15(d) of the

Securities Exchange Act of 1934

June 4, 2012

Date of report (Date of earliest event reported)

Integrated Device Technology, Inc.

(Exact name of registrant as specified in its charter)

6024 Silver Creek Valley Road, San Jose, California 95138

(Address of principal executive offices) (Zip Code)

(408) 284-8200

(Registrant’s telephone number, including area code)

Not Applicable

(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions:

Item 8.01 Other Events.

On June 4, 2012, Integrated Device Technology, Inc. (“IDT”) announced the expiration of the “go-shop” period pursuant to the terms of the previously announced merger agreement with PLX Technology, Inc. (“PLX”), dated April 30, 2012, which contemplates the exchange offer for all outstanding shares of PLX common stock, followed by a second step merger. Pursuant to the “go-shop” provisions of the merger agreement, PLX and its representatives were permitted to actively solicit alternative acquisition proposals for a period of 30 calendar days, which expired at 11:59 p.m. California time on May 30, 2012, and to continue negotiations with certain qualifying “excluded parties” for up to an additional 15 days thereafter. On May 31, 2012, PLX confirmed that it did not receive any superior acquisition proposals during the “go shop” period and that no qualifying “excluded party” would be permitted to engage in any subsequent negotiations. The full text of the press release is attached as Exhibit 99.1 to this current report on Form 8-K.

Additional Information

These materials are for informational purposes only and shall not constitute an offer to sell or the solicitation of an offer to buy any securities, nor shall there be any sale of securities in any jurisdiction in which such offer, solicitation or sale would be unlawful prior to registration or qualification under the securities laws of any such jurisdiction. Any offer with respect to the acquisition of PLX Technology will only be made through the prospectus, which is part of the registration statement on Form S-4, which contains an offer to purchase, form of letter of transmittal and other documents relating to the exchange offer, as well as the Tender Offer Statement on Schedule TO, (collectively, and as amended and supplemented from time to time, the “Exchange Offer Materials”), each initially filed with the U.S. Securities and Exchange Commission (the “SEC”) by IDT on May 22, 2012. The registration statement has not yet become effective. In addition, PLX Technology filed with the SEC on May 22, 2012 a solicitation/recommendation statement on Schedule 14D-9 (as amended and supplemented from time to time, the “Schedule 14D-9”) with respect to the exchange offer. Investors and security holders are urged to carefully read these documents and the other documents relating to the transactions because these documents contain important information relating to the exchange offer and related transactions. Investors and security holders may obtain a free copy of these documents, as filed with the SEC, and other annual, quarterly and special reports and other information filed with the SEC by IDT or PLX Technology, at the SEC’s website at www.sec.gov. In addition, such materials will be available from IDT or PLX Technology, or by calling Innisfree M&A Incorporated, the information agent for the exchange offer, toll-free at (877) 456-3463 (banks and brokers may call collect at (212) 750-5833).

Forward-Looking Statements

Certain statements in these materials may contain forward-looking statements relating to IDT, including expectations for IDT’s proposed acquisition of PLX. All statements included in this transcript concerning activities, events or developments that IDT expects, believes or anticipates will or may occur in the future are forward-looking statements. Forward-looking statements are based on current expectations and projections about future events and involve known and unknown risks, uncertainties and other factors that may cause actual results and performance to be materially different from any future results or performance expressed or implied by forward-looking statements, including the following: uncertainties as to the timing of the exchange offer and the subsequent merger; uncertainties as to how many of PLX’s stockholders will tender their shares of common stock in the exchange offer; the risk that competing offers or acquisition proposals will be made; the risk that the exchange offer and the subsequent merger will not close because of a failure to satisfy one or more of the offer closing conditions (including regulatory approvals); the risk that the announcement and pendency of the transactions may make it more difficult to establish or maintain relationships with employees, suppliers and other business partners; the risk that stockholder litigation in connection with the exchange offer or the merger may result in significant costs of defense, indemnification and liability; the risk that IDT’s or PLX’s business will have been adversely impacted during the pendency of the exchange offer and the merger; the risk that the operations of the

companies will not be integrated successfully; the risk that the expected cost savings and other synergies from the transaction may not be fully realized, realized at all or take longer to realize than anticipated; and other economic, business and competitive factors affecting the businesses of IDT and PLX generally, including those set forth in the filings of IDT and PLX with the SEC from time to time, including their respective annual reports on Form 10-K and quarterly reports on Form 10-Q, their current reports on Form 8-K and other SEC filings. These forward-looking statements speak only as of the date of this communication and IDT does not undertake any obligation to update or revise any forward-looking statement, whether as a result of new information, future events and developments or otherwise, except as required by law.

Item 9.01 Financial Statements and Exhibits.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

Exhibit Index