{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74CB3Q3345RGYR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74CB3Q3345RGYR","canonicalUrl":"https://icboms.com/texas-instruments/SN74CB3Q3345RGYR","factsUrl":"https://icboms.com/api/mcp/products/SN74CB3Q3345RGYR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74CB series, SN74CB3Q3345RGYR, Bus Switch 8 x 1:1, 2.3V ~ 3.6V single supply, -40°C ~ 85°C, 20-VQFN (3.5x4.5) exposed pad, surface mount, tape and reel.","salesMarkdown":"## What this bus switch does on your board The SN74CB3Q3345RGYR is an 8-bit, 1:1 bus switch from the 74CB family, designed for isolating or connecting digital signals on a PCB without adding propagation delay. It operates from a single 2.3V to 3.6V supply, making it a direct fit for 2.5V and 3.3V logic rails in mixed-voltage systems. Each of the eight channels passes a digital signal with minimal on-resistance, preserving signal integrity in high-speed buses like SPI, I²C, or GPIO expansion. The switch is bidirectional, so data flows in either direction when the output-enable pin is asserted. ## Supply range and temperature grade Running at 2.5V reduces dynamic power; at 3.3V the switch delivers its lowest on-resistance. The single-supply architecture simplifies the power tree — no separate VCC for the switch core and the I/O buffers. This is a clean drop-in for designs that already have a 2.5V or 3.3V rail. ## Package and mounting reality The 20-VFQFN package with exposed pad (3.5 mm x 4.5 mm body) requires a thermal land pattern on the PCB for both heat sinking and mechanical stability. Surface-mount assembly on a standard reflow profile (lead-free, 260°C peak) is fine. ## Lifecycle and sourcing posture ROHS3 compliance is confirmed, so no exemption expiry concerns for EU or California markets. The 74CB series is a mature logic family; production is stable. We source this device per RFQ against your BOM quantity. Confirm the date-code and lot traceability requirements at quote time — we can provide manufacturer trace documentation for audit trails.","metaTitle":"SN74CB3Q3345RGYR Bus Switch – Texas Instruments 74CB Series","metaDescription":"SN74CB3Q3345RGYR is an 8 x 1:1 bus switch from Texas Instruments, 74CB series. Active lifecycle, 2.3V–3.6V supply, -40°C to 85°C, 20-VQFN package.","metaKeywords":null},"attributes":{"series":"74CB","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Crystals & Oscillators"],"specifications":{"Type":"Bus Switch","Series":"74CB","Circuit":"8 x 1:1","Package":"Tape & Reel (TR); Cut Tape (CT)","Mounting Type":"Surface Mount","Package / Case":"20-VFQFN Exposed Pad","lifecycle_stage":"eol_hot","Voltage - Supply":"2.3V ~ 3.6V","Independent Circuits":"1","Operating Temperature":"-40°C ~ 85°C","Voltage Supply Source":"Single Supply","Supplier Device Package":"20-VQFN (3.5x4.5)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.23","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.23000","currency":"USD"},{"qty":10,"price":"$1.09800","currency":"USD"},{"qty":25,"price":"$1.04160","currency":"USD"},{"qty":100,"price":"$0.85570","currency":"USD"},{"qty":250,"price":"$0.79992","currency":"USD"},{"qty":500,"price":"$0.70692","currency":"USD"},{"qty":1000,"price":"$0.55809","currency":"USD"},{"qty":3000,"price":"$0.52650","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/1bfcac204b626744af6a4431cbbf809e.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74CB3Q3345RGYR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74CB3Q3345RGYR 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}}