{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"DM74S280J","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"DM74S280J","canonicalUrl":"https://icboms.com/texas-instruments/DM74S280J","factsUrl":"https://icboms.com/api/mcp/products/DM74S280J","rawCanonicalId":null},"summary":{"shortDescription":"National Semiconductor DM74S280J, TTL parity generator/checker, 14-pin DIP, Bulk package, active production, RoHS non-compliant.","salesMarkdown":"## What a parity generator/checker does in a TTL backplane The DM74S280J is a 9-bit odd/even parity generator and checker implemented in Schottky TTL. In a bus or memory system, it computes the parity bit on write and checks it on read — a single device handles both generation and verification depending on the control pin state. ## RoHS non-compliance and the tin-lead reality The DM74S280J is RoHS non-compliant, meaning it uses a tin-lead (SnPb) finish on the leads. This is the legacy finish that matches the thermal profile of SnPb soldering processes and avoids the tin-whisker risk of pure tin on through-hole parts. For designs still running SnPb reflow or wave solder, this is the correct metallurgy — no mix-alloy concerns. Bulk packaging means the parts ship in tubes or anti-static trays, not tape-and-reel. For through-hole assembly on a wave line, this is the standard presentation; pick-and-place for DIPs typically uses tube feeders anyway.","metaTitle":"DM74S280J parity generator/checker, TTL, active","metaDescription":"DM74S280J TTL parity generator/checker, active production. 14-pin DIP, Bulk package, RoHS non-compliant (tin-lead).","metaKeywords":null},"attributes":{"series":"*","packageCase":null,"mountingType":null,"rohsStatus":"RoHS non-compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Series":"*","Package":"Bulk","lifecycle_stage":"eol_hot"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.61","priceTiers":[{"qty":115,"price":"$2.61000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/59f7b0625c63cd3b2de2f405c209b502.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/DM74S280J/alternatives.json"},"ai":{"faq":[],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/DM74S280J","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/DM74S280J 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}}