{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN74AS643N","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN74AS643N","canonicalUrl":"https://icboms.com/texas-instruments/SN74AS643N","factsUrl":"https://icboms.com/api/mcp/products/SN74AS643N","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN74AS643N bus driver/transceiver, series *, active lifecycle, RoHS non-compliant, Bulk package.","salesMarkdown":"## Bus transceiver for backplane and memory-mapped I/O The Texas Instruments SN74AS643N is a bus driver/transceiver from the AS logic family, designed for bidirectional data transfer on a common bus. It handles the line-driving and direction-control tasks typical in backplane, memory-mapped I/O, and processor-to-peripheral interfaces where the bus needs to be actively driven in both directions. ## RoHS non-compliance — design-in constraint The SN74AS643N is listed as RoHS non-compliant. That means the device uses lead-bearing solder terminations, which rules it out for designs that require full RoHS compliance or lead-free reflow profiles.","metaTitle":"SN74AS643N Bus Driver/Transceiver, Active","metaDescription":"Texas Instruments SN74AS643N bus driver/transceiver. 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":"$3.1","priceTiers":[{"qty":97,"price":"$3.10000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/74bbd23c624b6c9cfbbf95e719ee0c75.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN74AS643N/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between SN74AS643N and SN74ALS643N?","answer":"Both are bus transceivers from Texas Instruments, but the SN74AS643N belongs to the Advanced Schottky (AS) family, which typically offers higher speed and drive capability compared to the Advanced Low-Power Schottky (ALS) family of the SN74ALS643N. The AS variant draws more supply current for the speed advantage. Pin-compatibility is the same, so a direct swap is possible if the system can tolerate the higher power and has the noise margin for the faster edges."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN74AS643N","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN74AS643N 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}}