{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74CBT3244PWR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74CBT3244PWR","canonicalUrl":"https://icboms.com/texas-instruments/SN74CBT3244PWR","factsUrl":"https://icboms.com/api/mcp/products/SN74CBT3244PWR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74CBT series SN74CBT3244PWR Bus Switch, 2 independent 4 x 1:1 circuits, 4.5V to 5.5V single supply, -40°C to 85°C, surface mount 20-TSSOP package.","salesMarkdown":"## Bus switch for 5 V logic isolation The Texas Instruments SN74CBT3244PWR is a 74CBT-series bus switch that provides two independent 4-bit (4 x 1:1) switching circuits in a single 20-TSSOP package. It operates from a 4.5 V to 5.5 V single supply, making it suitable for isolating or multiplexing 5 V CMOS/TTL logic signals on a board. The industrial temperature range (-40°C to 85°C) covers factory automation, telecom infrastructure, and outdoor equipment where the bus needs to be disconnected without adding propagation delay. ## Two 4-bit channels — what it means for the bus With two independent circuits, each handling a 4-bit-wide data path, this switch can isolate two separate 4-bit buses or combine them for an 8-bit application with external gating. The 1:1 configuration means each switch passes one signal per channel without voltage translation. Because bus switches have near-zero propagation delay (typically under 250 ps), they are used for hot-swap isolation, bus sharing, or analog signal switching where a standard logic gate would add unacceptable delay. ## Supply rail and temperature — fit check The 4.5 V to 5.5 V supply range is a standard 5 V ±10% rail, common in legacy industrial and telecom backplanes. The device is not rated for 3.3 V operation — if your design runs a 3.3 V bus, look at the 74CBT family's 3.3 V variants. It fits indoor and outdoor enclosures without active cooling, but not under-hood or engine-bay environments. ## Package and footprint Housed in a 20-TSSOP (4.40 mm width) surface-mount package, the SN74CBT3244PWR uses a standard 0.65 mm pitch footprint. The small body saves board area compared to a 20-SOIC, but the fine pitch means careful stencil design for soldering.","metaTitle":"SN74CBT3244PWR Bus Switch, 4 x 1:1, 20-TSSOP, Active","metaDescription":"TI SN74CBT3244PWR is a 74CBT bus switch with 2 independent 4-bit circuits, 4.5V-5.5V supply, -40°C to 85°C, 20-TSSOP. Active, ROHS3 compliant.","metaKeywords":null},"attributes":{"series":"74CBT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Type":"Bus Switch","Series":"74CBT","Circuit":"4 x 1:1","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Package / Case":"20-TSSOP (0.173\\\", 4.40mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5V ~ 5.5V","Independent Circuits":"2","Operating Temperature":"-40°C ~ 85°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"20-TSSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.69","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.69000","currency":"USD"},{"qty":10,"price":"$0.60500","currency":"USD"},{"qty":25,"price":"$0.56840","currency":"USD"},{"qty":100,"price":"$0.46400","currency":"USD"},{"qty":250,"price":"$0.43096","currency":"USD"},{"qty":500,"price":"$0.36676","currency":"USD"},{"qty":1000,"price":"$0.29341","currency":"USD"},{"qty":2000,"price":"$0.26590","currency":"USD"},{"qty":6000,"price":"$0.25950","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/c17326d16640f22c1ffc929253a8b6dd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SN74CBT3244PWR RoHS compliant?","answer":"Yes, it is ROHS3 compliant, meeting the EU RoHS directive for lead-free and restricted substances."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74CBT3244PWR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74CBT3244PWR 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}}