{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"CD74HCT21E","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"CD74HCT21E","canonicalUrl":"https://icboms.com/texas-instruments/CD74HCT21E","factsUrl":"https://icboms.com/api/mcp/products/CD74HCT21E","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments CD74HCT21E, 74HCT series, dual 4-input AND gate, 4.5V–5.5V supply, 27ns max propagation delay at 4.5V/50pF, -55°C to 125°C, 14-pin PDIP through-hole package.","salesMarkdown":"## Military temperature range – avionics and industrial use Rated for -55°C to 125°C operating temperature, this gate can be specified for avionics, satellite, downhole drilling, and outdoor industrial control where the ambient swings beyond commercial or even extended industrial limits. The through-hole PDIP package (14-DIP, 0.300\" wide) is socket-friendly and easy to hand-rework, which matters in low-volume or high-reliability builds where reflow isn't an option. ## Active lifecycle – no LTB risk It is RoHS3 compliant (lead-free). For production BOMs that need a through-hole AND gate, this part is a straightforward fit without obsolescence planning overhead.","metaTitle":"CD74HCT21E 74HCT AND Gate, 27ns, -55 to 125°C, PDIP-14","metaDescription":"CD74HCT21E dual 4-input AND gate, 74HCT series, 4.5V–5.5V supply, 27ns prop delay at 50pF, -55°C to 125°C, PDIP-14. Active, RoHS3.","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":"Through Hole","Package / Case":"14-DIP (0.300\\\", 7.62mm)","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-PDIP","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":"$0.43","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.43000","currency":"USD"},{"qty":10,"price":"$0.36600","currency":"USD"},{"qty":25,"price":"$0.34120","currency":"USD"},{"qty":100,"price":"$0.27310","currency":"USD"},{"qty":250,"price":"$0.25356","currency":"USD"},{"qty":500,"price":"$0.21454","currency":"USD"},{"qty":1000,"price":"$0.16578","currency":"USD"},{"qty":2500,"price":"$0.15116","currency":"USD"},{"qty":5000,"price":"$0.14140","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/b97f64aa148b715034608c9124b9474f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the propagation delay of CD74HCT21E?","answer":"Maximum propagation delay is 27ns at 4.5V supply with a 50pF load. This sets the timing margin for 5V bus and control logic."},{"question":"What are the alternatives to CD74HCT21E?","answer":"The SN74HC21N is a functional alternative in the 74HC family, but note its 2V to 6V supply range and narrower -40°C to 85°C temperature grade. The CD74HCT21E's -55°C to 125°C range and TTL-compatible inputs are the deciding factors for military-temp or mixed 5V-TTL designs."},{"question":"Is CD74HCT21E RoHS compliant?","answer":"Yes, CD74HCT21E is RoHS3 compliant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/CD74HCT21E","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/CD74HCT21E when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-14T11:08:19.451Z","lastPublished":"2026-07-14T11:08:19.451Z","indexable":true}}