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<SEC-DOCUMENT>0001140361-07-022182.txt : 20071115
<SEC-HEADER>0001140361-07-022182.hdr.sgml : 20071115
<ACCEPTANCE-DATETIME>20071115155454
ACCESSION NUMBER:		0001140361-07-022182
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20071113
FILED AS OF DATE:		20071115
DATE AS OF CHANGE:		20071115

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			RF MICRO DEVICES INC
		CENTRAL INDEX KEY:			0000911160
		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
		IRS NUMBER:				561733461
		STATE OF INCORPORATION:			NC
		FISCAL YEAR END:			0331

	BUSINESS ADDRESS:	
		STREET 1:		7628 THORNDIKE ROAD
		CITY:			GREENSBORO
		STATE:			NC
		ZIP:			27409-9421
		BUSINESS PHONE:		3369317042

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			VAN BUSKIRK ROBERT M
		CENTRAL INDEX KEY:			0001248222

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-22511
		FILM NUMBER:		071249753

	BUSINESS ADDRESS:	
		STREET 1:		C/O SIRENZA MICRODEVICES INC
		STREET 2:		522 ALMANOR AENUE
		CITY:			SUNNYVALE
		STATE:			CA
		ZIP:			94085
		BUSINESS PHONE:		3033273193

	MAIL ADDRESS:	
		STREET 1:		C/O SIRENZA MICRODEVICES INC.
		STREET 2:		303 SOUTH TECHNOLOGY COURT
		CITY:			BROOMFIELD
		STATE:			CO
		ZIP:			80021
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc1.xml
<DESCRIPTION>FORM 4
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

    <documentType>4</documentType>

    <periodOfReport>2007-11-13</periodOfReport>

    <notSubjectToSection16>0</notSubjectToSection16>

    <issuer>
        <issuerCik>0000911160</issuerCik>
        <issuerName>RF MICRO DEVICES INC</issuerName>
        <issuerTradingSymbol>RFMD</issuerTradingSymbol>
    </issuer>

    <reportingOwner>
        <reportingOwnerId>
            <rptOwnerCik>0001248222</rptOwnerCik>
            <rptOwnerName>VAN BUSKIRK ROBERT M</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>7628 THORNDIKE ROAD</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>GREENSBORO</rptOwnerCity>
            <rptOwnerState>NC</rptOwnerState>
            <rptOwnerZipCode>27409</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
        </reportingOwnerAddress>
        <reportingOwnerRelationship>
            <isDirector>0</isDirector>
            <isOfficer>1</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle>President Multi-Market Product</officerTitle>
            <otherText></otherText>
        </reportingOwnerRelationship>
    </reportingOwner>

    <nonDerivativeTable>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-11-13</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>1261041</value>
                </transactionShares>
                <transactionPricePerShare>
                    <footnoteId id="F1"/>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1261041</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
        <nonDerivativeTransaction>
            <securityTitle>
                <value>Common Stock</value>
            </securityTitle>
            <transactionDate>
                <value>2007-11-14</value>
            </transactionDate>
            <deemedExecutionDate></deemedExecutionDate>
            <transactionCoding>
                <transactionFormType>4</transactionFormType>
                <transactionCode>A</transactionCode>
                <equitySwapInvolved>0</equitySwapInvolved>
            </transactionCoding>
            <transactionTimeliness>
                <value></value>
            </transactionTimeliness>
            <transactionAmounts>
                <transactionShares>
                    <value>95238</value>
                </transactionShares>
                <transactionPricePerShare>
                    <value>0</value>
                </transactionPricePerShare>
                <transactionAcquiredDisposedCode>
                    <value>A</value>
                </transactionAcquiredDisposedCode>
            </transactionAmounts>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>1356279</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
                </directOrIndirectOwnership>
                <natureOfOwnership>
                    <value></value>
                </natureOfOwnership>
            </ownershipNature>
        </nonDerivativeTransaction>
    </nonDerivativeTable>

    <footnotes>
        <footnote id="F1">Received in exchange for 706,545 shares of Sirenza Microdevices, Inc. (&quot;Sirenza&quot;) common stock in connection with the acquisition of Sirenza by RF Micro Devices, Inc. (the &quot;Company&quot;) pursuant to an Agreement and Plan of Merger and Reorganization (the &quot;Merger Agreement&quot;), dated as of August 12, 2007, among the Company, a wholly owned subsidiary of the Company, and Sirenza.  The Merger Agreement provides for holders of Sirenza common stock to receive, in exchange for each share of Sirenza common stock they own, a combination of cash in the amount of $5.56 and 1.7848 shares of the Company's common stock (with cash substituted for any fractional shares).</footnote>
    </footnotes>

    <remarks></remarks>

    <ownerSignature>
        <signatureName>/s/ Suzanne B. Rudy</signatureName>
        <signatureDate>2007-11-15</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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