    <SEC-DOCUMENT>0001193125-25-058963-index.html : 20250320
    <SEC-HEADER>0001193125-25-058963.hdr.sgml : 20250320
    <ACCEPTANCE-DATETIME>20250320160422
    ACCESSION NUMBER:		0001193125-25-058963
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		45
    CONFORMED PERIOD OF REPORT:	20250502
    FILED AS OF DATE:		20250320
    DATE AS OF CHANGE:		20250320

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			LATTICE SEMICONDUCTOR CORP
    		CENTRAL INDEX KEY:			0000855658
    		STANDARD INDUSTRIAL CLASSIFICATION:	SEMICONDUCTORS & RELATED DEVICES [3674]
    		ORGANIZATION NAME:           	04 Manufacturing
    		IRS NUMBER:				930835214
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1228

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	000-18032
    		FILM NUMBER:		25756422

    	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>DEF 14A
    <SEQUENCE>1
    <FILENAME>d899460ddef14a.htm
    <DESCRIPTION>DEF 14A
    <TEXT>
    Document 1 - file: d899460ddef14a.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>2
    <FILENAME>lscc-20241228.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA
    <TEXT>
    Document 2 - file: lscc-20241228.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.DEF
    <SEQUENCE>3
    <FILENAME>lscc-20241228_def.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION DEFINITION LINKBASE
    <TEXT>
    Document 3 - file: lscc-20241228_def.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>4
    <FILENAME>lscc-20241228_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE
    <TEXT>
    Document 4 - file: lscc-20241228_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>5
    <FILENAME>lscc-20241228_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE
    <TEXT>
    Document 5 - file: lscc-20241228_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>g899460capture2aa.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: g899460capture2aa.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>g899460capture7a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: g899460capture7a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>g899460capture8a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: g899460capture8a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>g899460captureak.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: g899460captureak.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>g899460g00m00.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: g899460g00m00.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>g899460g00m02.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: g899460g00m02.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>g899460g00m04.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: g899460g00m04.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>g899460g00m07.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: g899460g00m07.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>g899460g00m08.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: g899460g00m08.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>g899460g00n09.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: g899460g00n09.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>g899460g00n10.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: g899460g00n10.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>g899460g03a11.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: g899460g03a11.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>g899460g04a12.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: g899460g04a12.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>g899460g14u86.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: g899460g14u86.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>g899460g25a11.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: g899460g25a11.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>g899460g25b12.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: g899460g25b12.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>g899460g31a77.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: g899460g31a77.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>g899460g31u81.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: g899460g31u81.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>g899460g38h33.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: g899460g38h33.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>g899460g40a40.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 25 - file: g899460g40a40.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>g899460g79b79.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 26 - file: g899460g79b79.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>g899460g80b80.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 27 - file: g899460g80b80.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>g899460g80e60.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 28 - file: g899460g80e60.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>g899460g81b81.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 29 - file: g899460g81b81.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>g899460gra01b.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 30 - file: g899460gra01b.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>g899460gra01c.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 31 - file: g899460gra01c.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>g899460gra01d.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 32 - file: g899460gra01d.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>g899460gra01g.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 33 - file: g899460gra01g.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>g899460gra05a.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 34 - file: g899460gra05a.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>g899460sp002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 35 - file: g899460sp002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>37
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 37 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>38
    <FILENAME>R2.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 38 - file: R2.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>39
    <FILENAME>R3.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 39 - file: R3.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>40
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 40 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>41
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 41 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>43
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 43 - file: FilingSummary.html

    Document 43 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>45
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 45 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>46
    <FILENAME>0001193125-25-058963-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 46 - file: 0001193125-25-058963-xbrl.zip

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>47
    <FILENAME>d899460ddef14a_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 47 - file: d899460ddef14a_htm.html

    Document 47 - RAW XML: d899460ddef14a_htm.xml

    </DOCUMENT>
    </SEC-DOCUMENT>