{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY74FCT240ATSOCT","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CY74FCT240ATSOCT","canonicalUrl":"https://icboms.com/texas-instruments/CY74FCT240ATSOCT","factsUrl":"https://icboms.com/api/mcp/products/CY74FCT240ATSOCT","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74FCT series CY74FCT240ATSOCT, Buffer Inverting, 3-State output, 4.75V to 5.25V supply, 2 elements x 4 bits, 32mA/64mA drive, -40 to 85°C, 20-SOIC wide-body.","salesMarkdown":"## 74FCT inverting octal buffer — what you're getting The CY74FCT240ATSOCT is a dual 4-bit inverting buffer with 3-state outputs from the 74FCT series, running on a 4.75V to 5.25V supply. It packs two elements, each handling four bits, and delivers 32 mA source / 64 mA sink per output — enough to drive a moderate backplane or memory-array bus without external line drivers. The 20-SOIC wide-body footprint (0.295\" body width) is a standard industrial package, and the -40 to 85 °C industrial temperature grade covers most factory-floor and outdoor telecom enclosures. ## Output drive and supply — what the numbers mean for your bus The 32 mA high-level and 64 mA low-level output currents are the headline selection parameters. At 5 V nominal, that sink current handles a fan-out of roughly 10 standard LSTTL loads per output, or drives a 50 Ω terminated line with decent noise margin. The 3-state outputs let multiple devices share a common data bus — the buffer goes high-impedance when the output-enable is asserted, so a second buffer or transceiver can take over without contention. The supply range is tight: 4.75 V to 5.25 V, so this part is strictly a 5 V logic device. Don't try to run it at 3.3 V — the inputs won't recognise a 3.3 V signal as a valid high, and the outputs won't swing rail-to-rail at that voltage. ## Lifecycle and compliance — active, ROHS3, no LTB worry The CY74FCT240ATSOCT carries an Active product status and is ROHS3 compliant. The ROHS3 compliance means it passes the EU RoHS exemption list without any of the restricted substances above the threshold, so it ships into European and California markets without a compliance headache. ## Storage and handling — MSL and reel care The part ships in Tape & Reel (TR) or Cut Tape (CT) format. The 20-SOIC wide-body package is typically MSL 3 (moisture sensitivity level 3) — standard for SOIC packages.","metaTitle":"CY74FCT240ATSOCT Buffer Inverting 3-State 20-SOIC, 5V Supply","metaDescription":"CY74FCT240ATSOCT buffer/inverter with 3-state outputs, 32mA/64mA drive, -40 to 85°C. Active, ROHS3.","metaKeywords":null},"attributes":{"series":"74FCT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"74FCT","Package":"Tape & Reel (TR); Cut Tape (CT)","Logic Type":"Buffer, Inverting","Output Type":"3-State","Mounting Type":"Surface Mount","Package / Case":"20-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Number of Elements":"2","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"20-SOIC","Current - Output High, Low":"32mA, 64mA","Number of Bits per Element":"4"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.88","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.88000","currency":"USD"},{"qty":10,"price":"$0.78500","currency":"USD"},{"qty":25,"price":"$0.74480","currency":"USD"},{"qty":100,"price":"$0.61190","currency":"USD"},{"qty":250,"price":"$0.57204","currency":"USD"},{"qty":500,"price":"$0.50552","currency":"USD"},{"qty":1000,"price":"$0.39909","currency":"USD"},{"qty":2000,"price":"$0.37650","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/7573f3003978a23a0d87152fafe1f5ea.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CY74FCT240ATSOCT compatible with 3.3V logic?","answer":"No. The supply voltage range is 4.75 V to 5.25 V. At 3.3 V the inputs will not reliably recognise a high-level signal, and the outputs will not swing to valid logic levels. Use a 3.3 V–compatible buffer like the SN74LVC2G17 (Schmitt-trigger, 1.65 V to 5.5 V) if you need 3.3 V operation."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CY74FCT240ATSOCT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CY74FCT240ATSOCT when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-16T10:39:33.080Z","lastPublished":"2026-07-16T10:39:33.080Z","indexable":true}}