{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74CBT3244PW","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74CBT3244PW","canonicalUrl":"https://icboms.com/texas-instruments/SN74CBT3244PW","factsUrl":"https://icboms.com/api/mcp/products/SN74CBT3244PW","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN74CBT3244PW, 74CBT series Bus Switch, 4 x 1:1 circuit, 2 independent circuits, single 4.5V~5.5V supply, -40°C~85°C, 20-TSSOP package, surface mount.","salesMarkdown":"## Bus switch, not a buffer — why that matters for signal routing The SN74CBT3244PW is a 4-bit bus switch from TI's 74CBT family, configured as 4 x 1:1 SPST switches with two independent circuits. Unlike a logic buffer or transceiver, a bus switch presents near-zero propagation delay and minimal signal distortion — it acts like a low-ON-resistance analog pass gate when enabled, and a high-impedance isolation when disabled. This makes it the right choice for connecting or disconnecting digital buses without adding timing skew, such as multiplexing memory banks, isolating peripheral interfaces, or sharing a data bus between multiple controllers. ## 4.5 V to 5.5 V supply — a 5 V logic world part The supply range is 4.5 V to 5.5 V single-supply, meaning this switch is designed for traditional 5 V TTL/CMOS logic environments. If your board runs on 3.3 V or lower, this part will not operate — you would need a 74CBT-family variant specified for lower VCC. The 5 V rail also sets the switch's ON-state resistance and signal swing; expect the pass transistor to conduct rail-to-rail signals up to VCC. ## Industrial temperature range and active lifecycle Rated for -40°C to 85°C, this part covers the industrial temperature grade — suitable for factory automation, telecom base stations, outdoor networking gear, and similar environments where the ambient temperature stays within that window. It is not qualified for automotive under-hood or extended -40°C to 125°C applications. TI lists the SN74CBT3244PW as Active in production, with ROHS3 compliance confirmed. ## 20-TSSOP — compact footprint for dense boards Housed in a 20-pin TSSOP package (0.173\" body width, 4.40 mm), this is a fine-pitch surface-mount part suited for high-density PCBs. The narrow body saves board area compared to a SOIC-20, but requires careful solder-paste stencil design and reflow profiling to avoid bridging.","metaTitle":"SN74CBT3244PW Bus Switch, 4 x 1:1, 20-TSSOP, Active","metaDescription":"TI SN74CBT3244PW bus switch, 4 x 1:1 circuit, 4.5V~5.5V supply, -40°C~85°C, 20-TSSOP. Active production, 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":"Tube","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":"$1.3","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.30000","currency":"USD"},{"qty":10,"price":"$1.16600","currency":"USD"},{"qty":25,"price":"$1.10720","currency":"USD"},{"qty":100,"price":"$0.90940","currency":"USD"},{"qty":250,"price":"$0.85008","currency":"USD"},{"qty":500,"price":"$0.75122","currency":"USD"},{"qty":1000,"price":"$0.59307","currency":"USD"},{"qty":2500,"price":"$0.55950","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/c17326d16640f22c1ffc929253a8b6dd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is SN74CBT3244PW RoHS compliant?","answer":"Yes, the SN74CBT3244PW is ROHS3 compliant."},{"question":"What is the typical application for SN74CBT3244PW?","answer":"As a 4-bit bus switch, it is used for digital bus isolation, signal gating, and multiplexing in 5 V logic systems — for example, sharing a data bus between multiple memory banks or peripherals, or isolating a debug/programming interface from the main circuit during normal operation."},{"question":"How does SN74CBT3244PW compare to SN74CBT3245PW?","answer":"The SN74CBT3245PW is an 8-bit bus switch (8 x 1:1) in a 20-pin TSSOP, whereas the SN74CBT3244PW offers 4 bits (4 x 1:1) with two independent circuits. Both operate from a 4.5 V to 5.5 V supply and share the same package footprint. Choose the 3245 when you need 8 channels in a single package; the 3244 gives you two separate enable controls for the two 4-bit banks."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74CBT3244PW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74CBT3244PW 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}}