{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS08DR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS08DR","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS08DR","factsUrl":"https://icboms.com/api/mcp/products/SN74LS08DR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments 74LS series, Quad 2-Input AND Gate, SN74LS08DR, 14-SOIC (0.154\", 3.90mm Width), Surface Mount, 4.75V ~ 5.25V supply, 0°C ~ 70°C operating temperature.","salesMarkdown":"## 20 ns propagation delay — the speed floor for a 5 V bus The SN74LS08DR is a quad 2-input AND gate from the 74LS family, packing four independent gates into a 14-SOIC package. Its 20 ns max propagation delay at 5 V with a 15 pF load sets the timing budget for a 5 V bus — every gate transition eats 20 ns, so a four-gate cascade adds 80 ns of combinatorial delay before the clock edge. The output stage sinks 8 mA and sources 400 µA, which is typical for the LS family — enough to drive one or two standard TTL loads but not a heavy capacitive bus. If you are fanning out to more than four inputs, buffer the output or expect the rise time to stretch past the datasheet limit. ## Supply rails and input thresholds — the 5 V TTL sweet spot The supply range is 4.75 V to 5.25 V — a tight 5 V ±5 % window. The input logic-low threshold is 0.8 V max, and the logic-high threshold is 2 V min, so it directly interfaces with 5 V TTL outputs without level shifting. A 3.3 V logic output driving a 2 V high threshold has 1.3 V of noise margin; marginal but workable if the trace is short. The operating temperature range is 0 °C to 70 °C — commercial grade. This is fine for bench equipment, office peripherals, and indoor industrial controls, but not for an engine bay or a freezer. The 14-SOIC package (3.90 mm body width) is a common footprint that routes well on two-layer boards with 0.050-inch pitch. ## Active production, ROHS3 — sourcing reality The 74LS family is widely second-sourced; if TI lead times stretch, a functionally equivalent 74LS08 from another manufacturer in the same 14-SOIC footprint is a drop-in replacement.","metaTitle":"SN74LS08DR TI 74LS Quad AND Gate, 20ns @ 5V, 15pF","metaDescription":"SN74LS08DR Texas Instruments 74LS quad 2-input AND gate in 14-SOIC. Active production, ROHS3 compliant. Sourced to order against RFQ.","metaKeywords":null},"attributes":{"series":"74LS","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"74LS","Package":"Tape & Reel (TR); Cut Tape (CT)","Logic Type":"AND Gate","Mounting Type":"Surface Mount","Package / Case":"14-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Number of Inputs":"2","Voltage - Supply":"4.75V ~ 5.25V","Number of Circuits":"4","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":"20ns @ 5V, 15pF"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$0.73","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$0.73000","currency":"USD"},{"qty":10,"price":"$0.64400","currency":"USD"},{"qty":25,"price":"$0.60480","currency":"USD"},{"qty":100,"price":"$0.49350","currency":"USD"},{"qty":250,"price":"$0.45836","currency":"USD"},{"qty":500,"price":"$0.39008","currency":"USD"},{"qty":1000,"price":"$0.31206","currency":"USD"},{"qty":2500,"price":"$0.28281","currency":"USD"},{"qty":5000,"price":"$0.27600","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/6d635c0c263ba33b3fcc25aa4895c294.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the propagation delay of SN74LS08DR?","answer":"The maximum propagation delay is 20 ns at 5 V with a 15 pF load. This is the speed floor for timing calculations — every gate transition adds 20 ns to the combinatorial path."},{"question":"What package does SN74LS08DR come in?","answer":"The SN74LS08DR is supplied in a 14-SOIC package (0.154-inch body width, 3.90 mm), surface-mount. It is available in Tape & Reel or Cut Tape options."},{"question":"What compliance documentation does Texas Instruments provide for SN74LS08DR?","answer":"The SN74LS08DR is ROHS3 compliant. Texas Instruments provides the standard compliance documentation including RoHS certificates and material declarations."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS08DR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS08DR when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}