LATTICE SEMICONDUCTOR CORP — Director's Dealing 2012

May 8, 2012

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: LATTICE SEMICONDUCTOR CORP (LSCC)
CIK: 0000855658
Period of Report: 2012-05-04

Reporting Person: Milstead Byron Wayne (VP Corp, General Counsel)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2012-05-04	Common Stock	M	1400	—	Acquired	13446	Direct
2012-05-04	Common Stock	F	496	$4.96	Disposed	12950	Direct
2012-05-04	Common Stock	S	9009	$5.03	Disposed	3941	Direct
2012-05-04	Common Stock	M	8125	$1.98	Acquired	12066	Direct
2012-05-04	Common Stock	S	8125	$4.9801	Disposed	3941	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2012-05-04	Non-Qualified Stock Option (right to buy)	$1.98	M	8125	Disposed	2016-11-03	Common Stock (8125)	Direct
2012-05-04	Restricted Stock Unit (RSU)	$	M	1400	Disposed		Common Stock (1400)	Direct

Footnotes

F1: Restricted Stock Units - no purchase price for this transaction.

F2: 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.

F3: The transaction indicated was conducted under an approved 10b5-1 Plan.

F4: 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.

F5: Each Restricted Stock Unit (RSU) represents a right to receive one share of the Issuers common shares without payment of specific consideration.

F6: 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.

F7: Not applicable.