{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS644-1N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS644-1N","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS644-1N","factsUrl":"https://icboms.com/api/mcp/products/SN74LS644-1N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN74LS644-1N, 74LS series, 8-bit transceiver, inverting, open collector output, 20-DIP (0.300\", 7.62mm), through hole, 0°C to 70°C.","salesMarkdown":"## What the open collector output means on a 20-DIP transceiver The SN74LS644-1N: This is an 8-bit transceiver with inverting logic and open collector outputs — the 24 mA sink current at logic low (with 100 µA source high) lets it drive relays, optocouplers, or bus lines that need a wired-AND configuration, common in 5 V TTL backplanes where multiple drivers share a pull-up.","metaTitle":"SN74LS644-1N Texas Instruments Transceiver, Inverting","metaDescription":"SN74LS644-1N active Texas Instruments 8-bit transceiver, inverting, open collector output, 4.75V-5.25V, 0-70°C, 20-DIP. Quoted to order against RFQ.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Package":"Bulk","Logic Type":"Transceiver, Inverting","Output Type":"Open Collector","Mounting Type":"Through Hole","Package / Case":"20-DIP (0.300\\\", 7.62mm)","lifecycle_stage":"eol_hot","Voltage - Supply":"4.75V ~ 5.25V","Number of Elements":"1","Operating Temperature":"0°C ~ 70°C (TA)","Supplier Device Package":"20-PDIP","Current - Output High, Low":"100µA, 24mA","Number of Bits per Element":"8"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.24","stockQuantity":0,"priceTiers":[{"qty":135,"price":"$2.24000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/296d9486f6e297130953e9032e85d6b4.pdf","sourceUrl":null},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS644-1N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS644-1N 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}}