{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN65HVD12DG4","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN65HVD12DG4","canonicalUrl":"https://icboms.com/texas-instruments/SN65HVD12DG4","factsUrl":"https://icboms.com/api/mcp/products/SN65HVD12DG4","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN65HVD12DG4, Half-Duplex RS-422/RS-485 Transceiver, 1 Mbps, 3 V to 3.6 V Supply, 35 mV Hysteresis, -40°C to 85°C, 8-SOIC Package.","salesMarkdown":"## Half-duplex RS-485 transceiver for 3.3 V industrial buses The Texas Instruments SN65HVD12DG4 is a half-duplex RS-422/RS-485 transceiver in an 8-SOIC package, designed for 3.3 V-only systems where a single twisted pair carries differential data at rates up to 1 Mbps. The SN65HVD12DG4 carries a Last Buy status. That means TI has announced end-of-life for this specific order code; once the final shipments clear the factory, no more units will be manufactured. For a production line that already qualifies this part, the immediate action is to secure enough inventory to cover the remaining build window — or to validate a pin-compatible replacement before the last-buy window closes. ## Receiver hysteresis and bus noise margin The 35 mV of receiver hysteresis is a deliberate design choice for RS-485 links that run through electrically noisy environments. Without hysteresis, a slowly changing differential signal near the threshold can oscillate or produce false edges. The 35 mV band creates a clean switching window, so the receiver output doesn't chatter when the bus is idle or during cable reflections. For comparison, many basic RS-485 transceivers offer only 20 mV or no specified hysteresis — the SN65HVD12DG4's margin is a real advantage on long stubs or in the same panel as VFDs.","metaTitle":"SN65HVD12DG4 RS-485 Transceiver, 1 Mbps, 3.3 V, SOIC-8","metaDescription":"TI SN65HVD12DG4 half-duplex RS-422/RS-485 transceiver, 1 Mbps data rate, 3 V to 3.6 V supply, 35 mV hysteresis, -40°C to 85°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Last Buy","categoryPath":["Interface & Transceivers"],"specifications":{"Mfr":"Texas Instruments","Type":"Transceiver","Duplex":"Half","Series":"-","Package":"Tube","Protocol":"RS422, RS485","Data Rate":"1Mbps","Mounting Type":"Surface Mount","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Last Time Buy","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Base Product Number":"65HVD12","Receiver Hysteresis":"35 mV","Operating Temperature":"-40°C~85°C","Supplier Device Package":"8-SOIC","Number of Drivers/Receivers":"1/1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.4900","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/8184a8761e2cd96372c20ad22682ea16.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN65HVD12DG4/alternatives.json"},"ai":{"faq":[{"question":"Is SN65HVD12DG4 obsolete or last time buy?","answer":"Yes, the SN65HVD12DG4 is in Last Buy status. Texas Instruments has discontinued this order code, and final shipments are being fulfilled. If you need this part for an active BOM, we recommend securing inventory now."},{"question":"Is SN65HVD12DG4 compatible with 3.3 V and RS-485 standards?","answer":"Yes. It supports both RS-422 and RS-485 protocols at 1 Mbps, so it works directly on standard RS-485 buses without level shifters. The half-duplex architecture means it uses a single twisted pair for bidirectional communication, with the driver and receiver enabled alternately."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN65HVD12DG4","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN65HVD12DG4 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}