{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SN65HVD78DRBR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"SN65HVD78DRBR","canonicalUrl":"https://icboms.com/texas-instruments/SN65HVD78DRBR","factsUrl":"https://icboms.com/api/mcp/products/SN65HVD78DRBR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments SN65HVD78DRBR, RS422/RS485 Transceiver, Half-Duplex, 1/1 Drivers/Receivers, 50Mbps, 3V~3.6V, -40°C~125°C, 8-VDFN Exposed Pad, 8-SON (3x3).","salesMarkdown":"It handles one driver and one receiver on a single 3.3V supply rail (3V to 3.6V) and pushes data at 50 Mbps — fast enough for high-speed industrial backplanes, motor-drive encoder links, and building-automation fieldbus nodes. ## 50 Mbps and 80 mV hysteresis — what they mean on the bus At 50 Mbps the SN65HVD78DRBR keeps the bit period under 20 ns, so it can drive short, point-to-point RS-422 links at full speed or drop to lower rates on longer RS-485 multi-drop runs. The 80 mV receiver hysteresis gives 40 mV of noise margin above the standard 200 mV differential threshold — useful on a noisy factory floor where common-mode shifts from motor drives can blur the idle bus. That margin means fewer false start bits and less software retry overhead. ## 3.3V supply — not 5V tolerant This part runs on 3V to 3.6V only. The bus pins are not 5V tolerant, so if the rest of the system uses 5V logic or a 5V transceiver on the same twisted pair, you need level translation or a different transceiver. For a pure 3.3V backplane or a 3.3V microcontroller UART, it connects directly — no external regulator or level shifter needed.","metaTitle":"SN65HVD78DRBR RS-485/RS-422 Transceiver, 50 Mbps, 3.3V","metaDescription":"TI SN65HVD78DRBR half-duplex RS-485/RS-422 transceiver, 50 Mbps data rate, 3V–3.6V supply, -40°C to 125°C, 8-SON package.","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":"50Mbps","Mounting Type":"Surface Mount","Package / Case":"8-VDFN Exposed Pad","Product Status":"Active","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Base Product Number":"65HVD78","Receiver Hysteresis":"80 mV","Operating Temperature":"-40°C~125°C","Supplier Device Package":"8-SON (3x3)","Number of Drivers/Receivers":"1/1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.4100","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/01d3b90c85b255b169123cd5f5519c00.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/SN65HVD78DRBR/alternatives.json"},"ai":{"faq":[{"question":"Is SN65HVD78DRBR 3.3V or 5V compatible?","answer":"It is a 3.3V-only device, specified for 3V to 3.6V supply. The bus pins are not 5V tolerant, so it cannot be used on a 5V RS-485 bus without level shifting."},{"question":"What is the data rate of SN65HVD78DRBR?","answer":"The transceiver supports a data rate of 50 Mbps, which suits high-speed point-to-point RS-422 links and shorter RS-485 multi-drop runs."},{"question":"What package does SN65HVD78DRBR use?","answer":"It comes in an 8-VDFN exposed-pad package, supplied as 8-SON (3x3 mm) — a compact, surface-mount footprint with a thermal pad for heat sinking."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/SN65HVD78DRBR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/SN65HVD78DRBR 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}}