Ownership Submission
FORM 4
Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).
UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940
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(Print or Type Responses)
1. Name and Address of Reporting Person *
Milstead Byron Wayne
   2. Issuer Name and Ticker or Trading Symbol
LATTICE SEMICONDUCTOR CORP [LSCC] 		5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)
_____ Director _____ 10% Owner
__X__ Officer (give title below) _____ Other (specify below)
Corp VP and General Counsel
(Last)
(First)
(Middle)
5555 N.E. MOORE CT.		 3. Date of Earliest Transaction (Month/Day/Year)
05/04/2011
(Street)

HILLSBORO, OR 97124		 4. If Amendment, Date Original Filed(Month/Day/Year)
 6. Individual or Joint/Group Filing(Check Applicable Line)
_X_ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person
(City)
(State)
(Zip)
Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3)		 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code
(Instr. 8)		 4. Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4 and 5)		 5. Amount of Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 3 and 4)		 6. Ownership Form: Direct (D) or Indirect (I)
(Instr. 4)		 7. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V Amount (A) or (D) Price
Common Stock 05/04/2011   M   1,400 A $ 0 (1) 6,793 D  
Common Stock 05/04/2011   F(2)   496 D $ 6.79 6,297 D  
Common Stock 05/05/2011   M   16,668 (3) A $ 2.32 22,965 D  
Common Stock 05/05/2011   S   16,668 (3) D $ 6.6806 6,297 D  
Common Stock 05/05/2011   M   8,125 (3) A $ 1.98 14,422 D  
Common Stock 05/05/2011   S   8,125 (3) D $ 6.6788 6,297 D  

Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security
(Instr. 3)		 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (Month/Day/Year) 3A. Deemed Execution Date, if any (Month/Day/Year) 4. Transaction Code
(Instr. 8)		 5. Number of Derivative Securities Acquired (A) or Disposed of (D)
(Instr. 3, 4, and 5)		 6. Date Exercisable and Expiration Date
(Month/Day/Year)		 7. Title and Amount of Underlying Securities
(Instr. 3 and 4)		 8. Price of Derivative Security
(Instr. 5)		 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s)
(Instr. 4)		 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I)
(Instr. 4)		 11. Nature of Indirect Beneficial Ownership
(Instr. 4)
Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares
Non-Qualified Stock Option (right to buy) $ 1.98 05/05/2011   M     8,125 (3) 02/03/2010(4) 11/03/2016 Common Stock 8,125 $ 0 81,250 D  
Non-Qualified Stock Option (right to buy) $ 2.32 05/05/2011   M     16,668 (3) 08/04/2009(5) 08/04/2015 Common Stock 16,668 $ 0 83,346 D  
Restricted Stock Unit (RSU) (6) 05/04/2011   M     1,400   (7)   (8) Common Stock 1,400 $ 0 7,000 D  

Reporting Owners

Reporting Owner Name / Address Relationships
 Director  10% Owner  Officer  Other
Milstead Byron Wayne
5555 N.E. MOORE CT.
HILLSBORO, OR 97124		       Corp VP and General Counsel  

Signatures

 /s/ Byron W. Milstead   05/05/2011
**Signature of Reporting Person Date

Explanation of Responses:

* If the form is filed by more than one reporting person, see Instruction 4(b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1) Restricted Stock Units - no purchase price for this transaction.
(2) These shares were retained by the Issuer in order to meet the tax withholding obligations of the Reporting Person in connection with the vesting of an installment of the restricted stock units. The amoun retained by the Issuer was not in excess of the amount of the tax liability.
(3) The transaction indicated was conducted under an approved 10b5-1 Plan.
(4) This option to purchase shares of common stock becomes exercisable over a four year period where in 1/16th (6.25%) of the total shares granted vest on each quarterly anniversary of the grant date.
(5) This option to purchase shares of common stock vests as follows: 25% of the total amount of shares subject to the option shall vest on 8/4/2009. 6.25% of the total amount of the shares subject to the option shall vest each three months thereafter until all shares are vested on 8/4/2012.
(6) Each Restricted Stock Unit (RSU) represents a right to receive one share of the Issuers common shares without payment of specific consideration.
(7) Grants of Restricted Stock Units (RSUs) vest as follows: 25% of the RSUs will vest on 8/4/2009 and an additional 6.25% of the RSUs vest each three months thereafter until 100% of the RSU grant is vested on 8/4/2012.
(8) 22,400 Restricted Stock Units (RSUs) were granted on 8/4/08 and vest, in whole shares as follows: 25% of the RSU grant shall vest on 8/4/09, and an additional 6.25% of the RSUs vest on each three months thereafter until 100% of the RSU grant is vested on 8/4/2012.

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