{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74ALS20AD","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74ALS20AD","canonicalUrl":"https://icboms.com/texas-instruments/SN74ALS20AD","factsUrl":"https://icboms.com/api/mcp/products/SN74ALS20AD","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74ALS series SN74ALS20AD, dual 4-input NAND gate, 14-SOIC surface mount, 4.5V-5.5V supply, 12.5 ns propagation delay @ 5V/50pF, 0°C to 70°C operating temperature.","salesMarkdown":"## What this 74ALS NAND gate is for The SN74ALS20AD is a dual 4-input NAND gate from the 74ALS family, packaged in a 14-SOIC. It takes two independent 4-input NAND gates, each with a single output, and runs on a 4.5 V to 5.5 V supply. ## Package and mounting The 12.5 ns propagation delay at 5 V with a 50 pF load is the headline number. The output drive is 400 µA sourcing and 8 mA sinking. Input thresholds are standard TTL: a low below 0.8 V, a high above 2 V. The operating temperature range is 0°C to 70°C. ## Package and footprint The 14-SOIC body is 3.90 mm wide — the narrow SOIC footprint that matches the standard 14-pin SOIC land pattern. It's a surface-mount part, so no through-hole adapter board needed for new designs; for repair work, you'll be hot-air soldering or using a fine-tip iron on the existing pads. ## Sourcing and lifecycle ROHS3 compliant, which covers the EU RoHS exemption list. For a production BOM, this part doesn't carry an LTB risk today.","metaTitle":"SN74ALS20AD NAND Gate, 12.5 ns, 14-SOIC","metaDescription":"TI SN74ALS20AD dual 4-input NAND gate in 14-SOIC. 4.5V-5.5V supply, 12.5 ns propagation delay at 5V/50pF. Active lifecycle, ROHS3.","metaKeywords":null},"attributes":{"series":"74ALS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Analog & Data Acquisition"],"specifications":{"Series":"74ALS","Package":"Tube","Logic Type":"NAND 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":"0°C ~ 70°C","Input Logic Level - Low":"0.8V","Supplier Device Package":"14-SOIC","Input Logic Level - High":"2V","Current - Output High, Low":"400µA, 8mA","Max Propagation Delay @ V, Max CL":"12.5ns @ 5V, 50pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.51","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$1.51000","currency":"USD"},{"qty":10,"price":"$1.35100","currency":"USD"},{"qty":25,"price":"$1.28200","currency":"USD"},{"qty":100,"price":"$1.05320","currency":"USD"},{"qty":250,"price":"$0.98452","currency":"USD"},{"qty":500,"price":"$0.87004","currency":"USD"},{"qty":1000,"price":"$0.68688","currency":"USD"},{"qty":2500,"price":"$0.64800","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/93583e850bfb9fb6a4dc1fe169bfe896.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the propagation delay of SN74ALS20AD?","answer":"The maximum propagation delay is 12.5 ns at 5 V supply with a 50 pF load. That's the spec you use for timing closure on a 5 V TTL bus."},{"question":"What are the equivalents or replacements for SN74ALS20AD?","answer":"A direct functional equivalent is the SN74ALS11ANS, which is a triple 3-input AND gate from the same 74ALS series — same supply voltage range and similar propagation delay, but different logic function and pinout. For a NAND gate replacement, the SN74F00DR (quad 2-input NAND, 5 ns delay) is faster but from the 74F family; verify the input thresholds and output drive match your design. No single drop-in replacement exists — check your logic diagram before swapping."},{"question":"What is the difference between SN74ALS20AD and SN74LS20AD?","answer":"The SN74ALS20AD is the Advanced Low-Power Schottky version; it typically offers lower propagation delay and lower power consumption per gate compared to the standard LS (Low-Power Schottky) version. The ALS variant is a direct pin-compatible upgrade for most 5 V TTL sockets, but verify the output drive and input thresholds against your specific load."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74ALS20AD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74ALS20AD 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}}