{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74LS644DW","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74LS644DW","canonicalUrl":"https://icboms.com/texas-instruments/SN74LS644DW","factsUrl":"https://icboms.com/api/mcp/products/SN74LS644DW","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN74LS644DW, LS Series TTL Bus Transceiver, Bulk shipping, Active lifecycle, RoHS non-compliant.","salesMarkdown":"The SN74LS644DW is an LS-series TTL bus transceiver from Texas Instruments. It handles bidirectional data flow between two buses, a standard function for legacy 5 V logic systems found in industrial controllers, telecom line cards, and older embedded designs. ## RoHS flag — check your assembly line This part is RoHS non-compliant. If your production line runs lead-free reflow profiles, the SN74LS644DW will need an exemption or a separate hand-solder / wave-solder step. For legacy boards originally built with tin-lead solder, it's a direct drop-in — no process change needed. ## Sourcing posture No last-time-buy or end-of-life risk on this line today.","metaTitle":"SN74LS644DW LS TTL Bus Transceiver, Active","metaDescription":"SN74LS644DW is an LS-series TTL bus transceiver from Texas Instruments. Active lifecycle, RoHS non-compliant.","metaKeywords":null},"attributes":{"series":"*","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"*","Package":"Bulk","lifecycle_stage":"eol_hot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.47","priceTiers":[{"qty":205,"price":"$1.47000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a14ba68a27702f662f4d3d4886321541.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74LS644DW/alternatives.json"},"ai":{"faq":[{"question":"Where can I buy SN74LS644DW?","answer":"Submit a request for current availability and pricing — no stock or price figures are published here."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74LS644DW","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74LS644DW 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}}