-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
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 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
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 YXqihNPJUEalE/5fdyxB8w==

<SEC-DOCUMENT>0001281505-04-000046.txt : 20040820
<SEC-HEADER>0001281505-04-000046.hdr.sgml : 20040820
<ACCEPTANCE-DATETIME>20040820172415
ACCESSION NUMBER:		0001281505-04-000046
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		2
CONFORMED PERIOD OF REPORT:	20040818
FILED AS OF DATE:		20040820

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			KING LAWRENCE ALAN
		CENTRAL INDEX KEY:			0001189917

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06395
		FILM NUMBER:		04989700

	BUSINESS ADDRESS:	
		STREET 1:		C/O SEMTECH
		STREET 2:		200 FLYNN ROAD
		CITY:			CAMARILLO
		STATE:			CA
		ZIP:			90312-6790
		BUSINESS PHONE:		8054982111

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			SEMTECH CORP
		CENTRAL INDEX KEY:			0000088941
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				952119684
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			0131

	BUSINESS ADDRESS:	
		STREET 1:		200 FLYNN ROAD
		CITY:			CAMARILLO
		STATE:			CA
		ZIP:			93012-8790
		BUSINESS PHONE:		8054982111

	MAIL ADDRESS:	
		STREET 1:		200 FLYNN ROAD
		STREET 2:		200 FLYNN ROAD
		CITY:			CAMARILLO
		STATE:			CA
		ZIP:			93012-8790
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2004-08-18</periodOfReport>

    <issuer>
        <issuerCik>0000088941</issuerCik>
        <issuerName>SEMTECH CORP</issuerName>
        <issuerTradingSymbol>SMTC</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001189917</rptOwnerCik>
            <rptOwnerName>KING LAWRENCE ALAN</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>200 FLYNN ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>CAMARILLO</rptOwnerCity>
            <rptOwnerState>CA</rptOwnerState>
            <rptOwnerZipCode>93012-8790</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>Vice President</officerTitle>
        </reportingOwnerRelationship>
    </reportingOwner>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Option (right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>17.48</value>
            </conversionOrExercisePrice>
            <transactionDate>
                <value>2004-08-18</value>
            </transactionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionAmounts>
                <transactionShares>
                    <value>50000</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <exerciseDate>
                <footnoteId id="F1"/>
            </exerciseDate>
            <expirationDate>
                <value>2014-08-18</value>
            </expirationDate>
            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
                </underlyingSecurityTitle>
                <underlyingSecurityShares>
                    <value>50000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>50000</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes>
        <footnote id="F1">This option vests in four equal annual installments beginning August 18, 2005</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>Alan Lawrence King by Suzanna Fabos under Power of Attorney dated June 4, 2001 (attached)</signatureName>
        <signatureDate>2004-08-20</signatureDate>
    </ownerSignature>
</ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
<DOCUMENT>
<TYPE>EX-24
<SEQUENCE>2
<FILENAME>kingpoa.txt
<DESCRIPTION>LAWRENCE ALAN KING
<TEXT>
POWER OF ATTORNEY


The undersigned, Lawrence Alan King, hereby constitutes and
appoints David G. Franz, Jr. and Suzanna Fabos, and each of them,
jointly and severally, his lawful attorney in fact and agent,
with full power of substitution and resubstitution, for him
and in his name, place and stead, in any and all capacities,
to execute and file with the Securities and Exchange Commission
and any stock exchange or similar authority (or any other
governmental or regulatory authority) Forms 3, 4 and 5 under
Section 16(a) of the Securities Exchange Act of 1934, as amended
(the Act) and the rules thereunder, or any other appropriate
form, and all amendments thereto with all exhibits and any and
all documents required to be filed with respect thereto, relating
to his holdings or beneficial ownership of securities issued by
Semtech Corporation, a corporation organized under the laws of
the State of Delaware (the Corporation), granting unto said
attorneys in fact and agents, and each of them, full power and
authority to do and perform each and every act and thing requisite
or necessary to be done as fully to all intents and purposes as
he might or could do in person, hereby ratifying and confirming
all that said attorneys in fact and agents, and each of them, or
his or her substitute or substitutes, may do or lawfully cause to
be done by virtue hereof.

The undersigned acknowledges that the foregoing attorneys in fact
and agents, solely by virtue of serving in such capacity at the
request of the undersigned, are not assuming, nor is the Corporation
assuming, any of the undersigneds responsibilities to comply with
Section 16 of the Act.

This Power of Attorney shall remain in full force and effect until
the undersigned is no longer required to file Forms 3, 4 and 5 with
respect to the undersigneds holdings or beneficial ownership of
and transactions in securities issued by the Corporation, unless
earlier revoked by the undersigned in a writing delivered to the
foregoing attorneys in fact.


/s/ Lawrence Alan King
Lawrence Alan King
June 4, 2001

</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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