{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN65HVD21ADR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN65HVD21ADR","canonicalUrl":"https://icboms.com/texas-instruments/SN65HVD21ADR","factsUrl":"https://icboms.com/api/mcp/products/SN65HVD21ADR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN65HVD21ADR, RS-422/RS-485 Transceiver, Half-Duplex, 1/1 Driver/Receiver, 5Mbps, 4.5V to 5.5V Supply, -40°C to 85°C, 8-SOIC Package.","salesMarkdown":"## RS-485/422 half-duplex transceiver with 130 mV hysteresis The receiver includes 130 mV of hysteresis, which improves noise immunity on long or electrically noisy cable runs — a practical advantage in factory-floor or outdoor telecom installations. ## Half-duplex bus — design implications Because the part is half-duplex, the driver and receiver share the same differential bus pair. The transmitter enable (DE) and receiver enable (RE) pins must be toggled to control bus direction — typically tied together or driven by a UART's RTS signal. This topology is standard for RS-485 multi-drop networks where only one node drives at a time.","metaTitle":"SN65HVD21ADR RS-485/422 Transceiver, Half-Duplex, 5Mbps","metaDescription":"Texas Instruments SN65HVD21ADR half-duplex RS-485/422 transceiver, 5Mbps data rate, 4.5V-5.5V supply, 130mV hysteresis, -40°C to 85°C, SOIC-8.","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)","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":"$2.5050","priceTiers":null},"links":{"datasheetUrl":null,"sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN65HVD21ADR/alternatives.json"},"ai":{"faq":[{"question":"Is SN65HVD21ADR full duplex or half duplex?","answer":"The SN65HVD21ADR is a half-duplex transceiver, meaning the driver and receiver share the same differential bus pair. This is the typical configuration for RS-485 multi-drop networks."},{"question":"What is the data rate of SN65HVD21ADR?","answer":"The SN65HVD21ADR supports data rates up to 5 Mbps. At this speed, cable length should be kept under a few hundred feet to maintain signal integrity."},{"question":"What package does SN65HVD21ADR come in?","answer":"It comes in an industry-standard 8-pin SOIC package (0.154\" width, 3.90 mm body) with surface-mount termination."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN65HVD21ADR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN65HVD21ADR 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}}