{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74HC21D","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74HC21D","canonicalUrl":"https://icboms.com/texas-instruments/SN74HC21D","factsUrl":"https://icboms.com/api/mcp/products/SN74HC21D","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74HC series, AND Gate, 2-Element, 4-Input, 5.2mA output, 14-SOIC package, -40°C to 85°C, 2V to 6V supply","salesMarkdown":"## Dual 4-input AND gate in 14-SOIC The SN74HC21D is a dual 4-input AND gate from the 74HC family, supplied in a 14-SOIC package (0.154\" body width, 3.90mm). It operates across a 2V to 6V supply range, making it a direct fit for 3.3V or 5V logic rails without a level translator. Each of the two gates has four inputs; the output drives up to 5.2mA in both high and low states. The quiescent current is 2µA max, so the part adds negligible static draw to a mixed-signal board. ## Timing and temperature envelope Propagation delay is 19ns at 6V with a 50pF load, which sets the timing floor for combinational paths in a 50pF net. Input logic thresholds scale with supply: low-level threshold is 0.5V to 1.8V, high-level is 1.5V to 4.2V. The wide hysteresis window means the gate tolerates slow edges from a mechanical switch or a long PCB trace. ## Active production — no obsolescence pressure The part is ROHS3 compliant and can be ordered against a BOM line without a lifecycle risk flag.","metaTitle":"SN74HC21D – Texas Instruments 74HC Dual 4-Input AND Gate","metaDescription":"SN74HC21D dual 4-input AND gate from TI's 74HC family. 2V-6V supply, 19ns propagation delay at 6V/50pF, -40°C to 85°C. Active production, 14-SOIC package.","metaKeywords":null},"attributes":{"series":"74HC","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Crystals & Oscillators"],"specifications":{"Series":"74HC","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":"2V ~ 6V","Number of Circuits":"2","Operating Temperature":"-40°C ~ 85°C","Input Logic Level - Low":"0.5V ~ 1.8V","Supplier Device Package":"14-SOIC","Input Logic Level - High":"1.5V ~ 4.2V","Current - Quiescent (Max)":"2 µA","Current - Output High, Low":"5.2mA, 5.2mA","Max Propagation Delay @ V, Max CL":"19ns @ 6V, 50pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.16","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.16000","currency":"USD"},{"qty":10,"price":"$1.03500","currency":"USD"},{"qty":25,"price":"$0.98240","currency":"USD"},{"qty":100,"price":"$0.80700","currency":"USD"},{"qty":250,"price":"$0.75436","currency":"USD"},{"qty":500,"price":"$0.66664","currency":"USD"},{"qty":1000,"price":"$0.52629","currency":"USD"},{"qty":2500,"price":"$0.49650","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/38c59cfb29ce89a4cb0ea024e68ecc3b.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is the SN74HC21D a direct replacement for the SN74HC21N?","answer":"The SN74HC21N is the through-hole (PDIP) version of the same dual 4-input AND gate. The SN74HC21D is the surface-mount 14-SOIC variant. Electrically identical — same supply range, same propagation delay, same temperature grade. The only difference is the package footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74HC21D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74HC21D 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}}