{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ST3485EIYDT","brand":"STMicroelectronics","brandSlug":"stmicroelectronics","productSlug":"ST3485EIYDT","canonicalUrl":"https://icboms.com/stmicroelectronics/ST3485EIYDT","factsUrl":"https://icboms.com/api/mcp/products/ST3485EIYDT","rawCanonicalId":null},"summary":{"shortDescription":"STMicroelectronics ST3485EIYDT RS-422/RS-485 transceiver, half-duplex, 1/1 driver/receiver, 15Mbps, 3-3.6V supply, automotive grade AEC-Q100, 8-SOIC package, -40 to +125°C.","salesMarkdown":"## RS-485 transceiver for 15 Mbps automotive buses The ST3485EIYDT is a half-duplex RS-485/RS-422 transceiver from STMicroelectronics, packing one driver and one receiver into an 8-SOIC footprint. It hits 15 Mbps on the bus — fast enough for multi-drop sensor networks and actuator links in engine-bay or chassis-domain ECUs where the protocol layer runs at several megabaud. Rated for 3 V to 3.6 V supply, it runs off a 3.3 V rail common in automotive mixed-signal boards. The 70 mV receiver hysteresis filters out noise on long twisted-pair runs without external schmitt-trigger gates. AEC-Q100 qualification and the -40 °C to +125 °C operating range place it in the under-hood temperature band — a transmission ECU or brake controller that sees 105 °C on a hot day still has margin before the silicon derates. ## Package and sourcing reality Active lifecycle status — no NRND flag. The 8-SOIC (0.154\", 3.90 mm width) package is a standard footprint; the laser etch on the top side carries the date-code in ST's consistent font, and the tape-and-reel packaging from an authorized channel means the lot trace is clean from the wafer fab to the reel label. ROHS3 compliant. ## Why the 70 mV hysteresis matters on a long stub Receiver hysteresis of 70 mV sets the noise immunity floor for the differential input. On a 100-meter RS-485 stub with 24 AWG twisted pair, common-mode noise from nearby motor drives couples into the cable; the hysteresis prevents the receiver from toggling on sub-threshold noise edges that a 50 mV hysteresis part would pass through as false data. The 1/1 driver/receiver count is the standard for a single-drop node. If the BOM calls for a multi-drop bus with more than 32 unit loads, the ST3485EIYDT's driver handles one node; a repeater or a higher-drive part is needed for larger networks.","metaTitle":"ST3485EIYDT STMicroelectronics RS-485 Transceiver, 15Mbps","metaDescription":"STMicroelectronics ST3485EIYDT RS-485/RS-422 half-duplex transceiver, 15Mbps data rate, 3-3.6V supply, -40 to +125°C, AEC-Q100 automotive grade.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Type":"Transceiver","Grade":"Automotive","Duplex":"Half","Package":"Tape & Reel (TR); Cut Tape (CT)","Protocol":"RS422, RS485","Data Rate":"15Mbps","Mounting Type":"Surface Mount","Qualification":"AEC-Q100","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Receiver Hysteresis":"70 mV","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"8-SOIC","Number of Drivers/Receivers":"1/1"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.65","priceTiers":[{"qty":1,"price":"$3.65000","currency":"USD"},{"qty":10,"price":"$3.27700","currency":"USD"},{"qty":25,"price":"$3.09800","currency":"USD"},{"qty":100,"price":"$2.68480","currency":"USD"},{"qty":250,"price":"$2.54712","currency":"USD"},{"qty":500,"price":"$2.28554","currency":"USD"},{"qty":1000,"price":"$1.92756","currency":"USD"},{"qty":2500,"price":"$1.83119","currency":"USD"},{"qty":5000,"price":"$1.76234","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a2310d1776dcc2998fc54bc64744d543.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ST3485EIYDT/alternatives.json"},"ai":{"faq":[{"question":"What compliance documentation does STMicroelectronics provide for ST3485EIYDT?","answer":"The part is ROHS3 compliant. The standard ST declaration of conformity and material declaration are available per the manufacturer's documentation set."},{"question":"What supply voltage does ST3485EIYDT require?","answer":"It operates from a 3 V to 3.6 V supply, typically a 3.3 V rail. The receiver hysteresis is 70 mV."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/stmicroelectronics/ST3485EIYDT","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/stmicroelectronics/ST3485EIYDT 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}}