Filed Pursuant to Rule 424(b)(3)

Filed Pursuant to Rule 424(b)(3)
Registration No. 333-143042

PROSPECTUS SUPPLEMENT No. 4, DATED July 30, 2007

(To Prospectus Dated May 17, 2007)

CYPRESS SEMICONDUCTOR CORPORATION

$600,000,000

(aggregate principal amount)

1.00% Convertible Senior Notes due September 15, 2009

and the Common Stock Issuable upon Conversion of the Notes

This Prospectus Supplement, together with the Prospectus listed above, is to be used by certain holders of the above-referenced securities or by their transferees, pledgees, donees or their successors in connection with the offer and sale of the above referenced securities.

The table captioned “Selling Securityholders” commencing on page 60 of the Prospectus is hereby amended to reflect the following additions and changes:

 

Name

  

Principal Amount at

Maturity of Notes

Beneficially Owned

That May Be Sold ($)

  

Percentage of

Notes Outstanding

(%)

  

Number of Shares of

Common Stock That

May Be Sold (1)

  

Percentage of

Common Stock

Outstanding (%)(2)

American Skandia Trust

   550,000    *    23,013    *

B.C. McCabe Foundation

   45,000    *    1,883    *

Commissioners of the Land Office

   475,000    *    19,874    *

Fore Convertible Master Fund Ltd.

   9,000    *    377    *

Fore Erisa Fund Ltd.

   1,000    *    42    *

Int’l Truck & Engine Corp. Non Contributory Retirement Plan Trust

   275,000    *    11,506    *

Int’l Truck & Engine Corp. Retirement Plan for Salaried Employee’s Trust

   150,000    *    6,276    *

Jeffries & Co., Inc.

   700,000    *    29,289    *

KeySpan Foundation

   25,000    *    1,046    *

KeySpan Insurance Company

   70,000    *    2,929    *

Lord Abbett Investment Trust - LA Convertible Fund

   1,720,000    *    71,967    *

Lord Abbett Series Fund - Bond Debenture Portfolio

   250,000    *    10,460    *

Merrill Lynch Insurance Group Bond Debenture Portfolio

   10,000    *    418    *

Met Investor Series Trust - Bond Debenture

   1,700,000    *    71,130    *

Millennium Partners, L.P.

   8,000,000    1.0    334,728    *

National Fuel & Gas Company Retirement Plan

   200,000    *    8,368    *

NFS- SCI Funeral and Merchandise Fixed Common

   95,000    *    3,975    *

NYC Teachers’ Variable Annuity Fund

   675,000    *    28,243    *

Philadelphia Board of Pensions

   260,000    *    10,879    *

Total Fina Elf Finance USA, Inc.

   125,000    *    5,230    *

Vermont Mutual Insurance Company

   45,000    *    1,883    *

Wachovia Bank, NA, as Trustee for the SCI Cemetary Merchandise Common Trust

   70,000    *    2,929    *

Wachovia Bank, NA, as Trustee for the SCI Pre-Need Common Trust Fund

   35,000    *    1,464    *

Whitebox Diversified Convertible Arbitrage Partners, LP

   2,000,000    *    83,682    *

* Less than 1%

 

(1) Assumes conversion of all of the holder’s notes at an initial conversion rate of approximately 41.84 shares of our common stock for each $1,000 principal amount of notes, or $23.90, subject to adjustment under certain circumstances as described under “Description of the Notes — Conversion.” As a result, the amount of common stock issuable upon conversion of the notes may increase or decrease in the future.

 

(2) Calculated based on Rule 13d-3(d)(i) of the Exchange Act using 151,188,267 shares of common stock outstanding as of May 1, 2007. In calculating this amount, we treated as outstanding the number of shares of common stock issuable upon conversion of all of that particular holder’s notes. However, we did not assume the conversion of any other holder’s notes.