{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CY74FCT821CTSOC","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CY74FCT821CTSOC","canonicalUrl":"https://icboms.com/texas-instruments/CY74FCT821CTSOC","factsUrl":"https://icboms.com/api/mcp/products/CY74FCT821CTSOC","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74FCT series D-Type flip-flop, CY74FCT821CTSOC, 10-bit, positive edge triggered, tri-state non-inverted outputs, 4.75V-5.25V supply, 12.5ns propagation delay, 24-SOIC package.","salesMarkdown":"## 10-bit register with 12.5 ns propagation delay The CY74FCT821CTSOC is a 10-bit D-type flip-flop from Texas Instruments' 74FCT series, clocked on the positive edge and driving tri-state, non-inverted outputs. Its 12.5 ns max propagation delay at 5 V into 300 pF sets the timing budget for synchronous buses — at a 50 MHz clock, the delay consumes about 62.5% of the half-cycle window, leaving roughly 7.5 ns for setup and hold at the receiver. ## Supply rails and output drive The 32 mA source / 64 mA sink output drive is enough to fan out to ten LSTTL loads or drive a 50 Ω terminated line through a series resistor. Quiescent current is 200 µA typical — negligible for a 5 V register, but worth noting if the board is battery-backed and the flip-flop sits in a bank that stays powered during sleep. Input capacitance is 5 pF per pin, light enough that a 50 MHz clock source sees a manageable load when driving multiple registers on the same net. Housed in a 24-pin SOIC with 7.50 mm body width, the package footprint is shared with many 8- to 10-bit bus-interface parts, so a layout swap to a different 24-SOIC register is often a straight BOM change.","metaTitle":"CY74FCT821CTSOC D-Type Flip-Flop, 10-bit, 12.5ns @ 5V","metaDescription":"Active Texas Instruments CY74FCT821CTSOC 10-bit D-type flip-flop with tri-state outputs, 4.75V-5.25V supply, 12.5ns propagation delay. Sourced to order.","metaKeywords":null},"attributes":{"series":"74FCT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Type":"D-Type","Series":"74FCT","Package":"Tube","Function":"Standard","Output Type":"Tri-State, Non-Inverted","Trigger Type":"Positive Edge","Mounting Type":"Surface Mount","Package / Case":"24-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Input Capacitance":"5 pF","Number of Elements":"1","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"24-SOIC","Current - Quiescent (Iq)":"200 µA","Current - Output High, Low":"32mA, 64mA","Number of Bits per Element":"10","Max Propagation Delay @ V, Max CL":"12.5ns @ 5V, 300pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.69","priceTiers":[{"qty":1,"price":"$1.69000","currency":"USD"},{"qty":10,"price":"$1.50700","currency":"USD"},{"qty":25,"price":"$1.43040","currency":"USD"},{"qty":100,"price":"$1.17510","currency":"USD"},{"qty":250,"price":"$1.09848","currency":"USD"},{"qty":500,"price":"$0.97074","currency":"USD"},{"qty":1000,"price":"$0.76638","currency":"USD"},{"qty":2500,"price":"$0.72300","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/846d8b64357aefffe353cf55b39db89d.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/CY74FCT821CTSOC/alternatives.json"},"ai":{"faq":[{"question":"What is the propagation delay of CY74FCT821CTSOC?","answer":"Maximum propagation delay is 12.5 ns at 5 V supply with a 300 pF load. This figure defines the timing closure window for synchronous data capture; at a 50 MHz clock, the delay consumes roughly 62% of the half-cycle."},{"question":"Can CY74FCT821CTSOC replace SN74LVC574APWT without board changes?","answer":"Not directly. SN74LVC574APWT is an 8-bit register in a 20-pin TSSOP running at 1.65-3.6 V, while CY74FCT821CTSOC is a 10-bit register in a 24-pin SOIC at 4.75-5.25 V. The supply voltage, pin count, and bit width differ — a board spin is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CY74FCT821CTSOC","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CY74FCT821CTSOC when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}