{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN65HVD21DR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN65HVD21DR","canonicalUrl":"https://icboms.com/texas-instruments/SN65HVD21DR","factsUrl":"https://icboms.com/api/mcp/products/SN65HVD21DR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN65HVD21DR half-duplex RS-485/RS-422 transceiver, 5 Mbps data rate, 130 mV receiver hysteresis, 4.5 V to 5.5 V supply, -40°C to 85°C, 8-SOIC.","salesMarkdown":"## Half-duplex RS-485 transceiver with 5 Mbps and 130 mV hysteresis The Texas Instruments SN65HVD21DR is a half-duplex RS-485/RS-422 transceiver in an 8-SOIC package, rated for 5 Mbps signaling with 130 mV of receiver hysteresis. At 5 Mbps the SN65HVD21DR can sustain a 200 ns bit period, which translates to roughly 400 m of cable at 5 Mbps before signal degradation forces a repeater. The 130 mV hysteresis on the receiver input cleans up noise on long stubs or in electrically noisy environments, so you get a clean logic level without external filtering on every node. ## Supply and temperature — design-in checklist The 8-SOIC footprint is a standard wide-body SOIC-8, so a layout already using that land pattern needs no board change.","metaTitle":"SN65HVD21DR RS-485/RS-422 Transceiver, 5 Mbps, 8-SOIC","metaDescription":"Texas Instruments SN65HVD21DR half-duplex RS-485/RS-422 transceiver, 5 Mbps data rate, 130 mV hysteresis, -40°C to 85°C, 8-SOIC.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Interface & Transceivers"],"specifications":{"Mfr":"Texas Instruments","Type":"Transceiver","Duplex":"Half","Series":"-","Package":"Tape & Reel (TR); Cut Tape (CT)","Protocol":"RS422, RS485","Data Rate":"5Mbps","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Voltage - Supply":"4.5V ~ 5.5V","Base Product Number":"65HVD21","Receiver Hysteresis":"130 mV","Operating Temperature":"-40°C~85°C","Supplier Device Package":"8-SOIC","Number of Drivers/Receivers":"1/1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.6900","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/bd0d8e36e12ed062757287fb6e2338d5.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN65HVD21DR/alternatives.json"},"ai":{"faq":[{"question":"What is the data rate of SN65HVD21DR?","answer":"The SN65HVD21DR is rated for 5 Mbps signaling."},{"question":"Is SN65HVD21DR compatible with SN65HVD20?","answer":"The SN65HVD21DR is a half-duplex transceiver, while the SN65HVD20 is a full-duplex device; they are not pin-compatible and serve different bus topologies."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN65HVD21DR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN65HVD21DR 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}}