{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISO7731BDWR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISO7731BDWR","canonicalUrl":"https://icboms.com/texas-instruments/ISO7731BDWR","factsUrl":"https://icboms.com/api/mcp/products/ISO7731BDWR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISO7731BDWR, General Purpose digital isolator, 3-channel unidirectional, capacitive coupling, 100 Mbps data rate, 5000 Vrms isolation, 2.25 V to 5.5 V supply, -55°C to 125°C, 16-SOIC.","salesMarkdown":"The Texas Instruments ISO7731BDWR is a three-channel, unidirectional digital isolator using capacitive coupling to transfer digital signals across an isolation barrier. ## 5000 Vrms isolation — what it buys you The 5000 Vrms isolation rating is the headline spec for safety-critical designs. It means this part can withstand a 5 kV potential between input and output for 1 minute per UL 1577, which qualifies it for reinforced insulation in medical (IEC 60601) and industrial (IEC 61010) applications. ## 100 Mbps data rate and 85 kV/µs CMTI The 100 Mbps data rate covers most common serial protocols — isolated SPI at 50 MHz, RS-485 at 20 Mbps, or CAN at 1 Mbps — without overspecifying for a slower bus. The 85 kV/µs minimum common-mode transient immunity (CMTI) is the number that matters in motor drives and inverters, where fast-switching SiC or IGBT stages slam the isolation barrier with high dV/dt edges. A part with CMTI below 50 kV/µs can glitch or latch in those environments; this one keeps the data clean. ## Channel layout and unidirectional flow The three channels are configured as two inputs on side 1 and one input on side 2 — unidirectional only, so data flows one way per channel. That matches the typical pattern where a microcontroller on side 1 sends control signals (chip select, clock, data) across the barrier and receives a single feedback or fault signal back. If you need bidirectional data on a single channel, look at the ISO7730 family or add a separate isolator for the return path. ## Package and supply — board-fit notes The part is surface-mount only, so plan for reflow or hot-air rework; no socket option for field swapping.","metaTitle":"TI ISO7731BDWR Digital Isolator, 3-Ch, 100 Mbps, 5000 Vrms","metaDescription":"Texas Instruments ISO7731BDWR: 3-channel unidirectional digital isolator, 100 Mbps data rate, 5000 Vrms isolation, -55°C to 125°C.","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":"Is ISO7731BDWR unidirectional or bidirectional?","answer":"It is unidirectional — each of the three channels passes data in one direction only. Two channels carry signals from side 1 to side 2, and one channel carries a signal from side 2 to side 1."},{"question":"What is the data rate of ISO7731BDWR?","answer":"It supports data rates up to 100 Mbps, which covers isolated SPI, RS-485, and CAN applications."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISO7731BDWR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ISO7731BDWR 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}}