{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74HCT21M","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74HCT21M","canonicalUrl":"https://icboms.com/texas-instruments/CD74HCT21M","factsUrl":"https://icboms.com/api/mcp/products/CD74HCT21M","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HCT series CD74HCT21M, dual 4-input AND gate, 14-SOIC surface-mount package, 4.5V to 5.5V supply, -55°C to 125°C operating temperature, 2 µA quiescent current, 27ns propagation delay at 4.5V/50pF.","salesMarkdown":"## Dual 4-input AND gate in 74HCT — what it is and where it fits The CD74HCT21M is a dual 4-input AND gate from the 74HCT logic family, in a 14-SOIC surface-mount package. It implements two independent AND functions, each with four inputs, and operates from a 4.5V to 5.5V supply. The 74HCT series uses TTL-compatible input thresholds (0.8V low, 2V high) while running on a 5V CMOS rail, making it a direct drop-in for 5V TTL legacy designs or mixed-logic boards that need CMOS output drive with TTL-level signaling. ## -55°C to 125°C — military temperature range for harsh environments Rated for -55°C to 125°C operating temperature, this part covers military, avionics, downhole, and outdoor telecom applications where the board sees extreme thermal cycling. The 27ns max propagation delay at 4.5V and 50pF load is the timing spec to close in your bus-margin analysis — it's the worst-case delay across temperature and voltage, so your setup/hold budget needs to accommodate it. Quiescent current maxes at 2 µA, which keeps the power rail draw negligible in standby or battery-backed sections. ## Sourcing and lifecycle — active, no LTB risk The CD74HCT21M carries an Active product status and is ROHS3 compliant.","metaTitle":"CD74HCT21M 74HCT Dual 4-Input AND Gate, 14-SOIC","metaDescription":"CD74HCT21M is a dual 4-input AND gate in 74HCT logic, 14-SOIC package, rated -55°C to 125°C. 4.5V–5.5V supply, 2 µA quiescent, 27ns propagation delay.","metaKeywords":null},"attributes":{"series":"74HCT","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"74HCT","Package":"Tube","Logic Type":"AND Gate","Mounting Type":"Surface Mount","Package / Case":"14-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Number of Inputs":"4","Voltage - Supply":"4.5V ~ 5.5V","Number of Circuits":"2","Operating Temperature":"-55°C ~ 125°C","Input Logic Level - Low":"0.8V","Supplier Device Package":"14-SOIC","Input Logic Level - High":"2V","Current - Quiescent (Max)":"2 µA","Current - Output High, Low":"4mA, 4mA","Max Propagation Delay @ V, Max CL":"27ns @ 4.5V, 50pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.92","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.92000","currency":"USD"},{"qty":10,"price":"$0.81900","currency":"USD"},{"qty":25,"price":"$0.77760","currency":"USD"},{"qty":100,"price":"$0.63880","currency":"USD"},{"qty":250,"price":"$0.59708","currency":"USD"},{"qty":500,"price":"$0.52766","currency":"USD"},{"qty":1000,"price":"$0.41658","currency":"USD"},{"qty":2500,"price":"$0.39300","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b97f64aa148b715034608c9124b9474f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is CD74HCT21M obsolete?","answer":"No, the CD74HCT21M is listed as Active in production status. There is no indication of discontinuation or last-time-buy, so it remains a safe choice for both new designs and ongoing production."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74HCT21M","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74HCT21M 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}}