{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"54LS279LMQB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"54LS279LMQB","canonicalUrl":"https://icboms.com/texas-instruments/54LS279LMQB","factsUrl":"https://icboms.com/api/mcp/products/54LS279LMQB","rawCanonicalId":null},"summary":{"shortDescription":"54LS279LMQB, 54LS TTL family, 1-bit R-S latch, TTL logic, Bulk package, active lifecycle.","salesMarkdown":"## Device identity and logic family The 54LS279LMQB is a 1-bit R-S latch implemented in low-power Schottky TTL, part of the 54LS series intended for extended-temperature-range applications. It performs the basic set-reset latch function common in control logic, debounce circuits, and register storage where a single-bit memory element is needed. ## Lifecycle and supply posture For a legacy TTL family part, active status is notable — it indicates ongoing manufacturing support rather than a last-time-buy or end-of-life phase. ## Package and handling note Bulk shipment means the parts are not pre-taped for automated placement; plan for hand-insertion or tube-fed assembly. No reel or tape dimensions apply.","metaTitle":"54LS279LMQB 54LS TTL R-S Latch, Active, Bulk","metaDescription":"54LS279LMQB is a 1-bit R-S latch in the 54LS TTL family. Active lifecycle, Bulk packaging.","metaKeywords":null},"attributes":{"series":"*","packageCase":null,"mountingType":null,"rohsStatus":"Not applicable","productStatus":"Active","categoryPath":["Logic ICs"],"specifications":{"Series":"*","Package":"Bulk","lifecycle_stage":"eol_hot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.5","stockQuantity":0,"priceTiers":[{"qty":86,"price":"$3.50000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/bcaeec6cf6273acee2ccdf1087d91656.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is 54LS279LMQB equivalent to 74LS279?","answer":"Functionally, the 54LS279 and 74LS279 are the same 1-bit R-S latch logic. The 54LS279LMQB is the 54LS variant, suitable for extended-temperature environments."},{"question":"What is the difference between 54LS279 and 74LS279?","answer":"The 54LS suffix 'LMQB' indicates a specific package and screening level. For most commercial designs, the 74LS279 is the cost-effective choice; the 54LS279 is used where extended temperature or military-grade reliability is required."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/54LS279LMQB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/54LS279LMQB 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}}