{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"54LS173FMQB","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"54LS173FMQB","canonicalUrl":"https://icboms.com/texas-instruments/54LS173FMQB","factsUrl":"https://icboms.com/api/mcp/products/54LS173FMQB","rawCanonicalId":null},"summary":{"shortDescription":"54LS173FMQB, D FLIP-FLOP, LS SERIES, Bulk package, active lifecycle stage.","salesMarkdown":"## What this part is — 54LS173FMQB The 54LS173FMQB is a D flip-flop from the LS series. It is a quad D flip-flop with clear and complementary outputs. The product status is Active. For a military-grade DIP or flatpack (the 54LS173FMQB suffix suggests a ceramic or hermetic package variant), Bulk delivery is standard: the parts arrive in anti-static tubes or waffle trays, suitable for hand-insertion, rework stations, or low-volume prototype runs. If your line runs automated assembly, confirm the package body style and lead form before ordering — Bulk can be hand-placed or re-taped on request.","metaTitle":"54LS173FMQB D Flip-Flop, LS Series, Active","metaDescription":"54LS173FMQB is a D flip-flop from the LS series, currently active production.","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":"$1.54","priceTiers":[{"qty":195,"price":"$1.54000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/463fb3773c9fe6e1a2bfb4fa405c97cf.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/54LS173FMQB/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between 54LS173FMQB and 74LS173?","answer":"Both are quad D flip-flops in the LS logic family. The 54LS173FMQB is the military-temperature-grade version (-55 to 125 °C) with tighter screening and burn-in, while the 74LS173 is the commercial-grade (0 to 70 °C) variant. Choose the 54-series for avionics, satellite, or downhole applications; the 74-series is sufficient for conditioned indoor equipment."},{"question":"What is the closest functional second-source for 54LS173FMQB?","answer":"The SNJ54AS74J is a peer from the AS (Advanced Schottky) series — faster propagation delay but higher power draw. Both are 54-series military-grade quad D flip-flops. The AS part may be a drop-in for speed-critical paths where the LS timing margin is tight, but verify the pinout and package footprint match your board before substituting."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/54LS173FMQB","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/54LS173FMQB 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}}