<SEC-DOCUMENT>0000855658-22-000189.txt : 20220804
<SEC-HEADER>0000855658-22-000189.hdr.sgml : 20220804
<ACCEPTANCE-DATETIME>20220804213413
ACCESSION NUMBER:		0000855658-22-000189
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20220802
FILED AS OF DATE:		20220804
DATE AS OF CHANGE:		20220804

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			O'Rourke Glenn
		CENTRAL INDEX KEY:			0001915824

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-18032
		FILM NUMBER:		221138384

	MAIL ADDRESS:	
		STREET 1:		1156 ROSEMONT ROAD
		CITY:			WEST LINN
		STATE:			OR
		ZIP:			97068

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LATTICE SEMICONDUCTOR CORP
		CENTRAL INDEX KEY:			0000855658
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				930835214
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		5555 NE MOORE CT
		CITY:			HILLSBORO
		STATE:			OR
		ZIP:			97124
		BUSINESS PHONE:		5032688000

	MAIL ADDRESS:	
		STREET 1:		5555 NE MOORE CT
		CITY:			HILLSBORO
		STATE:			OR
		ZIP:			97124
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
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<DESCRIPTION>PRIMARY DOCUMENT
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        <issuerCik>0000855658</issuerCik>
        <issuerName>LATTICE SEMICONDUCTOR CORP</issuerName>
        <issuerTradingSymbol>LSCC</issuerTradingSymbol>
    </issuer>

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        </reportingOwnerId>
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            <rptOwnerStreet1>1156 ROSEMONT ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>WEST LINN</rptOwnerCity>
            <rptOwnerState>OR</rptOwnerState>
            <rptOwnerZipCode>97068</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>SVP, Mfg Ops</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

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                <value>Common Stock</value>
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            <securityTitle>
                <value>Common Stock</value>
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            <transactionDate>
                <value>2022-08-04</value>
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                <transactionFormType>4</transactionFormType>
                <transactionCode>S</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
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    <derivativeTable>
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            <securityTitle>
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            </securityTitle>
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            </conversionOrExercisePrice>
            <transactionDate>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
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                </underlyingSecurityShares>
            </underlyingSecurity>
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                <sharesOwnedFollowingTransaction>
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        <derivativeTransaction>
            <securityTitle>
                <value>Restricted Stock Unit (RSU)</value>
            </securityTitle>
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                <footnoteId id="F5"/>
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                <transactionCode>M</transactionCode>
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                    <value>1878</value>
                </transactionShares>
                <transactionPricePerShare>
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                    <value>D</value>
                </transactionAcquiredDisposedCode>
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    <footnotes>
        <footnote id="F1">Restricted Stock Units - no purchase price for this transaction.</footnote>
        <footnote id="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 amount retained by the Issuer was not in excess of the amount of the tax liability.</footnote>
        <footnote id="F3">The transaction indicated was conducted under an approved 10b5-1 Plan.</footnote>
        <footnote id="F4">This transaction was executed in multiple trades at prices ranging from $64.28 to $65.11. The price reported above reflects the weighted average sale price. The Reporting Person undertakes to provide upon request by the staff of the Securities and Exchange Commission, the Issuer, or a security holder of the Issuer, full information regarding the number of shares sold at each separate sale price.</footnote>
        <footnote id="F5">Each Restricted Stock Unit (RSU) represents a right to receive one share of the Issuer's common stock without payment of specific consideration.</footnote>
        <footnote id="F6">Performance Restricted Stock Units (PRSUs) vest as follows: one-third of the PRSUs will vest on each anniversary of the date of grant, subject to the achievement of certain performance conditions.</footnote>
        <footnote id="F7">Not applicable.</footnote>
        <footnote id="F8">Grants of Restricted Stock Units (RSUs) vest as follows: 25% of the RSUs will vest on the first anniversary of the date of grant, and an additional 6.25% of the RSUs shall vest at the end of each three month period thereafter.</footnote>
    </footnotes>

    <ownerSignature>
        <signatureName>By: Tracy Feanny, Attorney in Fact For: Glenn T O'Rourke</signatureName>
        <signatureDate>2022-08-04</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
