{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISO7731FBDWR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISO7731FBDWR","canonicalUrl":"https://icboms.com/texas-instruments/ISO7731FBDWR","factsUrl":"https://icboms.com/api/mcp/products/ISO7731FBDWR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISO7731FBDWR, General Purpose digital isolator, Capacitive Coupling, 3 Channel, Unidirectional, 100Mbps, 5000Vrms, -55°C~125°C, 16-SOIC, Tape & Reel.","salesMarkdown":"## What this 3-channel isolator brings to the board The Texas Instruments ISO7731FBDWR is a general-purpose digital isolator using capacitive coupling to pass signals across a galvanic isolation barrier. It packs three unidirectional channels in a 16-SOIC package, configured with two inputs on side 1 and one input on side 2 — the typical layout for isolating an SPI bus (clock and data out forward, data in reverse) or splitting a control signal path. The headline rating is 5000Vrms isolation, paired with a 100Mbps data rate and 85kV/µs common-mode transient immunity, which means it can sit on a motor-drive or inverter board next to fast-switching IGBTs without losing data. The supply range from 2.25V to 5.5V lets it work across 3.3V and 5V logic domains without a level shifter. The 5000Vrms isolation voltage is the spec that qualifies this part for reinforced insulation in mains-connected equipment — think motor drives, industrial power supplies, and grid-tied inverters where a fault on the high-voltage side must not reach the control logic. The 85kV/µs common-mode transient immunity is the companion spec that matters when the isolator straddles a noisy switching node: fast voltage transients from a SiC or IGBT half-bridge can couple across a weak barrier and flip a data bit. At 85kV/µs, this part handles the edge rates you see in modern power stages without needing external filtering on every channel. That puts it in play for avionics, downhole instrumentation, engine-bay electronics, and outdoor telecom cabinets where the ambient can swing from a cold soak to a hot day under full solar load. No commercial-grade plastic part handles that range — this one does, in a standard 16-SOIC footprint that rework techs can swap with a hot-air station and tweezers.","metaTitle":"TI ISO7731FBDWR 3-Ch Digital Isolator, 5000Vrms, 100Mbps","metaDescription":"Texas Instruments ISO7731FBDWR general-purpose capacitive-coupling digital isolator.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Mfr":"Texas Instruments","Type":"General Purpose","Series":"-","Package":"Tape & Reel (TR)","Data Rate":"100Mbps","Technology":"Capacitive Coupling","Channel Type":"Unidirectional","Mounting Type":"Surface Mount","Isolated Power":"No","Package / Case":"16-SOIC (0.295\\\", 7.50mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Voltage - Supply":"2.25V ~ 5.5V","Number of Channels":"3","Base Product Number":"ISO7731","Voltage - Isolation":"5000Vrms","Operating Temperature":"-55°C~125°C","Inputs - Side 1/Side 2":"2/1","Rise / Fall Time (Typ)":"1.3ns, 1.4ns","Supplier Device Package":"16-SOIC","Pulse Width Distortion (Max)":"4.9ns","Propagation Delay tpLH / tpHL (Max)":"16ns, 16ns","Common Mode Transient Immunity (Min)":"85kV/µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$1.4250","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1faeef4a4392056447302f5819fac3d4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the data rate of ISO7731FBDWR?","answer":"100Mbps, which supports fast serial protocols like SPI up to 50 MHz clock rates without skew issues."},{"question":"Is ISO7731FBDWR compatible with a 3.3V supply?","answer":"Yes — the supply range is 2.25V to 5.5V, so it runs on 3.3V or 5V rails without modification."},{"question":"What is the closest pin-compatible equivalent to ISO7731FBDWR?","answer":"Within the same base product number family (ISO7731), the FBDWR variant is the tape-and-reel version of the standard SOIC-16 part. Other variants differ by data rate or package, but the ISO7731FBDWR is the 100Mbps, wide-body SOIC-16 option. For a second source, check the TI ISO77xx series — same footprint, same pinout, similar ratings."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISO7731FBDWR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ISO7731FBDWR 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}}