{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISOW1412DFMR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISOW1412DFMR","canonicalUrl":"https://icboms.com/texas-instruments/ISOW1412DFMR","factsUrl":"https://icboms.com/api/mcp/products/ISOW1412DFMR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISOW1412DFMR, RS422/RS485 digital isolator, 5000Vrms isolation, 500kbps data rate, 1/0 channel unidirectional, 3V-5.5V supply, -40°C to 125°C, 20-SOIC package.","salesMarkdown":"## What the 5000Vrms isolation and 500kbps data rate mean for your BOM The 500kbps data rate matches the signaling speed of most RS485 fieldbuses (Modbus RTU, Profibus DP at lower baud rates), so it slots into existing twisted-pair networks without needing a faster — and more expensive — isolator. The part uses magnetic coupling technology rather than capacitive coupling, which typically gives better common-mode transient immunity — here rated at 100kV/µs typical. That matters when the isolator sits on a motor-drive board where switching IGBTs slam the bus with fast voltage edges. The 610ns maximum propagation delay and 40ns pulse-width distortion are adequate for half-duplex RS485 polling cycles; a faster isolator would add cost without throughput gain at 500kbps. ## Temperature range and supply — where this part lives on the board No isolated power output on this device; the bus-side supply must be provided externally. The 20-SOIC wide-body package (0.295-inch width, 7.50mm) provides the creepage distance needed to maintain the 5000Vrms isolation rating across the PCB. Surface-mount assembly is standard.","metaTitle":"TI ISOW1412DFMR RS485/RS422 Isolator, 5000Vrms, 500kbps","metaDescription":"TI ISOW1412DFMR digital isolator for RS485/RS422. 5000Vrms isolation, 500kbps data rate, -40°C to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Type":"RS422, RS485","Package":"Tape & Reel (TR); Cut Tape (CT)","Data Rate":"500kbps","Technology":"Magnetic Coupling","Channel Type":"Unidirectional","Mounting Type":"Surface Mount","Isolated Power":"No","Package / Case":"20-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 5.5V","Number of Channels":"1","Voltage - Isolation":"5000Vrms","Operating Temperature":"-40°C ~ 125°C","Inputs - Side 1/Side 2":"1/0","Rise / Fall Time (Typ)":"4ns, 4ns (Max)","Supplier Device Package":"20-SOIC","Pulse Width Distortion (Max)":"40ns","Propagation Delay tpLH / tpHL (Max)":"610ns, 610ns","Common Mode Transient Immunity (Min)":"100kV/µs (Typ)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$10.78","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$10.78000","currency":"USD"},{"qty":10,"price":"$9.90800","currency":"USD"},{"qty":25,"price":"$9.49760","currency":"USD"},{"qty":100,"price":"$8.36810","currency":"USD"},{"qty":250,"price":"$7.95744","currency":"USD"},{"qty":850,"price":"$7.44406","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/273e54e7b61da4bdca91723c7dcde066.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the data rate of ISOW1412DFMR?","answer":"The data rate is 500kbps, suitable for RS485 fieldbuses like Modbus RTU at standard baud rates."},{"question":"ISOW1412DFMR equivalent or replacement?","answer":"The ISO7721FBDWR is a two-channel digital isolator with 100Mbps data rate and 5000Vrms isolation, but it is a general-purpose isolator, not an RS485-specific device. For a single-channel RS485 isolator at 500kbps, the ISOW1412DFMR is the direct fit — the ISO7721FBDWR would be overkill on speed and under-provisioned on channel count for a half-duplex bus."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISOW1412DFMR","citationPolicyUrl":"https://icboms.com/llms.txt","lastUpdated":"2026-07-17T19:50:00.618Z","lastPublished":"2026-07-17T19:50:00.618Z","indexable":true}}