{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISO7731DWR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISO7731DWR","canonicalUrl":"https://icboms.com/texas-instruments/ISO7731DWR","factsUrl":"https://icboms.com/api/mcp/products/ISO7731DWR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISO7731DWR, General Purpose, 3-Channel Unidirectional Digital Isolator, Capacitive Coupling, 100Mbps, 5000Vrms, 2.25V~5.5V, -55°C~125°C, 16-SOIC.","salesMarkdown":"## Three-channel capacitive isolator for high-speed signal isolation The Texas Instruments ISO7731DWR is a three-channel, unidirectional digital isolator using capacitive coupling technology. It is designed to transmit digital signals across an isolation barrier at data rates up to 100 Mbps, with a reinforced isolation rating of 5000 Vrms. Typical applications include industrial fieldbus interfaces, isolated SPI/UART links, motor-drive feedback paths, and medical equipment requiring galvanic isolation for patient safety. The 100 Mbps data rate is fast enough to handle full-speed SPI, CAN FD at 5 Mbps, and most UART-based protocols without timing compression. Propagation delay is 16 ns max, and pulse-width distortion is held to 4.9 ns max, so the output pulse width stays close to the input — important for maintaining duty cycle in PWM or encoder signals. Rise and fall times are 1.3 ns and 1.4 ns typical, which keeps edge-rate-induced ringing manageable on short PCB traces. ## Isolation and transient immunity for noisy environments The 5000 Vrms isolation voltage qualifies the ISO7731DWR for reinforced insulation per IEC 60747-5-5 and VDE 0884-11, making it suitable for medical and grid-tied applications where safety certification is required. Common-mode transient immunity is rated at 85 kV/µs minimum — this is the key spec for motor drives and inverter-fed systems where fast-switching IGBTs or SiC FETs couple high dv/dt noise across the barrier. A low CMTI number would cause data corruption in those environments; 85 kV/µs gives enough margin for most industrial drives. ## Temperature range and deployment environment The wide range also covers cold-start conditions in arctic deployments and self-heating in sealed enclosures. ## Package and footprint Housed in a 16-pin SOIC wide-body package (16-SOIC, 7.50 mm body width), the ISO7731DWR provides the creepage and clearance distances needed to maintain 5000 Vrms isolation. The wide-body SOIC is a standard footprint for high-voltage isolators, and the surface-mount package is compatible with reflow soldering processes.","metaTitle":"TI ISO7731DWR Digital Isolator, 100 Mbps, 5000 Vrms, 16-SOIC","metaDescription":"Texas Instruments ISO7731DWR: 3-channel unidirectional capacitive isolator, 100 Mbps data rate, 5000 Vrms isolation, -55°C to 125°C range. Active production.","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); Cut Tape (CT)","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":"$3.0300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/4bb33d1fcdd7379b943657a154225ada.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the difference between ISO7731DWR and ISO7730DWR?","answer":"The ISO7731DWR provides three unidirectional channels with a 2/1 input-to-output split (two inputs on side 1, one input on side 2). The ISO7730DWR has a different channel configuration — typically 3/0 or 0/3 depending on the variant. Both share the same 100 Mbps data rate, 5000 Vrms isolation, and 16-SOIC package, so they are footprint-compatible but differ in signal direction mapping. Check the channel count and direction against your application's isolation requirements."},{"question":"What is the data rate of ISO7731DWR?","answer":"The ISO7731DWR supports a maximum data rate of 100 Mbps. This is sufficient for high-speed SPI, CAN FD, and most serial interfaces used in industrial and automotive systems."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISO7731DWR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ISO7731DWR 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}}