{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS20N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS20N","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS20N","factsUrl":"https://icboms.com/api/mcp/products/SN74LS20N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series NAND Gate, SN74LS20N, dual 4-input, 14-DIP (0.300\", 7.62mm), Through Hole, 4.75V~5.25V supply, 15ns propagation delay, 0°C~70°C.","salesMarkdown":"## Active production — what it means for a BOM line The SN74LS20N: RoHS3 compliant, which covers the EU RoHS exemption list through 2024 — no separate exemption certificate is needed for most commercial and industrial assemblies. The SN74LS20N is a dual 4-input NAND gate from the 74LS Schottky-clamped bipolar family. Maximum propagation delay is 15 ns at 5 V into a 15 pF load. This sets the data-path timing floor: for a 10 MHz clock, the gate adds one full period of delay, so the downstream setup time must budget for it. Output drive is 400 µA sourcing and 8 mA sinking — enough to drive one or two standard TTL loads, but not a high-fanout bus or a long unterminated trace without a buffer. Quiescent current is 800 µA maximum, typical for the 74LS family; the bipolar core draws steady supply current regardless of switching activity. ## Package and board-fit — through-hole DIP Housed in a 14-pin DIP with 0.300-inch (7.62 mm) row spacing, the SN74LS20N uses the standard 0.100-inch pitch through-hole footprint. The supplier device package is 14-PDIP. ## Logic thresholds and noise margin Input logic-low threshold is 0.8 V maximum; logic-high is 2 V minimum. With a 5 V supply, the low-level noise margin is about 0.8 V (from VIL max to the 0 V rail) and the high-level margin is about 3 V (from 2 V to 5 V). The four inputs per gate are internally pulled high through the 74LS input structure — unused inputs should be tied to VCC or a valid logic level, not left floating, to avoid oscillation and excess supply current.","metaTitle":"SN74LS20N Texas Instruments 74LS NAND Gate, 2 Circuit","metaDescription":"Texas Instruments SN74LS20N dual 4-input NAND gate, 74LS series, 15ns propagation delay, 4.75V-5.25V supply, 14-DIP. Active, RoHS3 compliant. Order against RFQ.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Interface & Transceivers"],"specifications":{"Series":"74LS","Package":"Tube","Logic Type":"NAND Gate","Mounting Type":"Through Hole","Package / Case":"14-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Number of Inputs":"4","Voltage - Supply":"4.75V ~ 5.25V","Number of Circuits":"2","Operating Temperature":"0°C ~ 70°C","Input Logic Level - Low":"0.8V","Supplier Device Package":"14-PDIP","Input Logic Level - High":"2V","Current - Quiescent (Max)":"800 µA","Current - Output High, Low":"400µA, 8mA","Max Propagation Delay @ V, Max CL":"15ns @ 5V, 15pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.2","priceTiers":[{"qty":1,"price":"$1.20000","currency":"USD"},{"qty":10,"price":"$1.07300","currency":"USD"},{"qty":25,"price":"$1.01800","currency":"USD"},{"qty":100,"price":"$0.83620","currency":"USD"},{"qty":250,"price":"$0.78168","currency":"USD"},{"qty":500,"price":"$0.69080","currency":"USD"},{"qty":1000,"price":"$0.54537","currency":"USD"},{"qty":2500,"price":"$0.51450","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/4a750e614a1b3477cd101627846ac7c2.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74LS20N/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS20N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS20N 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}}