{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY74FCT245ATQCT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CY74FCT245ATQCT","canonicalUrl":"https://icboms.com/texas-instruments/CY74FCT245ATQCT","factsUrl":"https://icboms.com/api/mcp/products/CY74FCT245ATQCT","rawCanonicalId":null},"summary":{"shortDescription":"Cypress 74FCT series CY74FCT245ATQCT octal bus transceiver, non-inverting, 3-state outputs, 4.75V-5.25V supply, 32mA source / 64mA sink, -40°C to 85°C, 20-SSOP package.","salesMarkdown":"## 5V-only octal bus transceiver for industrial backplanes The CY74FCT245ATQCT from Cypress (now Infineon) is an 8-bit non-inverting bus transceiver in the 74FCT logic family, designed for bidirectional data flow between two 5V buses with 3-state outputs on both ports. It operates from a 4.75V to 5.25V supply — strictly a 5V part, not 3.3V-tolerant on the I/O — and delivers 32mA source / 64mA sink per output, enough to drive heavily loaded backplanes or long PCB traces without external buffers. ## Supply voltage and 3.3V compatibility The supply range is 4.75V to 5.25V, and the logic inputs are not 3.3V-compatible. If your design uses a 3.3V microcontroller or FPGA on one side of the bus, you need a level-shifting transceiver like the SN74LVTH16245ADGVR (2.7V supply, 3.3V I/O tolerant). The CY74FCT245ATQCT is a 5V-only part — applying 3.3V to the VCC rail will not meet the minimum operating voltage, and driving the inputs with 3.3V logic may not cross the VIH threshold reliably. ## Output drive and bus loading With 32mA source and 64mA sink per channel, this part can drive a 50-ohm terminated backplane or a bank of parallel inputs without needing a separate line driver. The asymmetric drive (more sink than source) matches the typical current draw of TTL-compatible loads. For lighter loads — say, a single 3.3V-tolerant peripheral through a level shifter — the SN74ABT2245DW offers similar drive at 4.5V minimum supply but in a wider SOIC-20 package. ## Lifecycle and sourcing posture ROHS3 compliant.","metaTitle":"CY74FCT245ATQCT 74FCT Octal Transceiver, 5V 20-SSOP","metaDescription":"CY74FCT245ATQCT 74FCT octal bus transceiver, non-inverting, 3-state outputs. 4.75V-5.25V supply, 32/64mA drive, -40°C to 85°C. Active lifecycle, 20-SSOP.","metaKeywords":null},"attributes":{"series":"74FCT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"74FCT","Package":"Tape & Reel (TR); Cut Tape (CT)","Logic Type":"Transceiver, Non-Inverting","Output Type":"3-State","Mounting Type":"Surface Mount","Package / Case":"20-SSOP (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Number of Elements":"1","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"20-SSOP","Current - Output High, Low":"32mA, 64mA","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.96","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.96000","currency":"USD"},{"qty":10,"price":"$0.85400","currency":"USD"},{"qty":25,"price":"$0.81080","currency":"USD"},{"qty":100,"price":"$0.66590","currency":"USD"},{"qty":250,"price":"$0.62252","currency":"USD"},{"qty":500,"price":"$0.55012","currency":"USD"},{"qty":1000,"price":"$0.43431","currency":"USD"},{"qty":2500,"price":"$0.40950","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/80df8a6558212cd30294a73b59f1ecdb.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY74FCT245ATQCT compatible with 3.3V logic?","answer":"No. The part operates from a 4.75V to 5.25V supply and its logic inputs are not specified for 3.3V levels. For 3.3V bus translation, consider a 2.7V-supply transceiver like the SN74LVTH16245ADGVR."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CY74FCT245ATQCT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CY74FCT245ATQCT 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}}