{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"74FST3245Q","brand":"Renesas Electronics","brandSlug":"renesas","productSlug":"74FST3245Q","canonicalUrl":"https://icboms.com/renesas/74FST3245Q","factsUrl":"https://icboms.com/api/mcp/products/74FST3245Q","rawCanonicalId":null},"summary":{"shortDescription":"Fairchild 74FST3245Q Bus Switch, 8 x 1:1 circuit, 4.75V ~ 5.25V supply, Single Supply, -40°C ~ 85°C, 20-QSOP package, Surface Mount, Active.","salesMarkdown":"## Bus switch for 5 V signal isolation The Fairchild 74FST3245Q is an 8-bit bus switch with a 1:1 signal-path configuration, designed to connect or isolate digital buses under logic control. ## Package options and footprint match The QSOP is narrower than the SSOP — 3.90 mm body width versus the same — so a board laid out for the SSOP footprint may not accept the QSOP without a land-pattern adjustment. Surface-mount assembly, no exposed pad. MSL level is not in the record, but a standard 20-pin QSOP typically runs MSL 1; the buyer should confirm with the date-code trace if the reel has been open. Independent-distributor stock also turns regularly for spot fills. The RoHS compliance status is listed as non-compliant, which matters for EU RoHS-exempt or legacy builds — verify your exemption coverage before committing the BOM line.","metaTitle":"74FST3245Q Bus Switch, 8 x 1:1, 20-QSOP, Active","metaDescription":"74FST3245Q bus switch from Fairchild, 8 x 1:1 circuit, 4.75V-5.25V supply, -40°C to 85°C, 20-QSOP package.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Type":"Bus Switch","Circuit":"8 x 1:1","Package":"Bulk","Mounting Type":"Surface Mount","Package / Case":"20-SSOP (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Independent Circuits":"1","Operating Temperature":"-40°C ~ 85°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"20-QSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.2","stockQuantity":0,"priceTiers":[{"qty":1519,"price":"$0.20000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/c03f0dc5f61a874bfebe2be47b1c63e5.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the exact function and package of 74FST3245Q?","answer":"The 74FST3245Q is an 8-bit bus switch with a 1:1 circuit configuration, used to connect or isolate digital buses."},{"question":"Can 74FST3245Q be used as a drop-in replacement for 74FST3245?","answer":"The 74FST3245 base family includes both SSOP and QSOP package options. The 74FST3245Q is the QSOP variant. If your board is laid out for the SSOP footprint, the QSOP may not be a direct drop-in due to the narrower body width. Check the land pattern against the 20-QSOP dimensions before substituting."},{"question":"Is 74FST3245Q compatible with 3.3 V logic?","answer":"No. Driving it from a 3.3 V rail would under-bias the internal switch pass gates, degrading on-resistance and signal integrity. A 3.3 V bus switch would need a different part number in the family."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/renesas/74FST3245Q","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/renesas/74FST3245Q when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}