{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISO7731DBQR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISO7731DBQR","canonicalUrl":"https://icboms.com/texas-instruments/ISO7731DBQR","factsUrl":"https://icboms.com/api/mcp/products/ISO7731DBQR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISO7731DBQR, General Purpose digital isolator, Capacitive Coupling, 3-channel unidirectional, 100 Mbps data rate, 3000 Vrms isolation, 2.25 V to 5.5 V supply, -55°C to 125°C, 16-SSOP package, Tape & Reel.","salesMarkdown":"## What this isolator brings to the board The Texas Instruments ISO7731DBQR is a three-channel, unidirectional digital isolator using capacitive coupling to pass signals across a 3000 Vrms isolation barrier at up to 100 Mbps. The 85 kV/µs common-mode transient immunity (CMTI) means it stays reliable in motor-drive or inverter environments where fast voltage swings on the isolated side would otherwise corrupt data. ## Channel count and direction — what the 2/1 split buys you Three unidirectional channels are configured as two on side 1 and one on side 2. That 2/1 split maps cleanly to a typical SPI bus: SCLK and MOSI forward, MISO reverse. For a half-duplex RS-485 or CAN interface, the single reverse channel handles the receive path while the two forward channels carry control and data. The unidirectional architecture also keeps propagation delay symmetric — 16 ns max in both directions — so timing closure on the bus is straightforward. That puts it in play for avionics, satellite payloads, downhole instrumentation, and outdoor telecom cabinets where the ambient can swing from a cold soak to a hot day under full sun. ## Lifecycle and sourcing For dual-sourcing or supply resilience, the base product number ISO7731 family includes other channel-count and package variants — the ISO7731DWR is the wider-body SOIC-16 version if you need more creepage distance.","metaTitle":"TI ISO7731DBQR Digital Isolator, 100 Mbps, 3-Ch, 16-SSOP","metaDescription":"Texas Instruments ISO7731DBQR general-purpose capacitive-coupling isolator: 100 Mbps data rate, 3000 Vrms isolation, 85 kV/µs CMTI, -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); Cut Tape (CT)","Data Rate":"100Mbps","Technology":"Capacitive Coupling","Channel Type":"Unidirectional","Mounting Type":"Surface Mount","Isolated Power":"No","Package / Case":"16-SSOP (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Voltage - Supply":"2.25V ~ 5.5V","Number of Channels":"3","Base Product Number":"ISO7731","Voltage - Isolation":"3000Vrms","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-SSOP","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":"$2.8100","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1faeef4a4392056447302f5819fac3d4.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is ISO7731DBQR compatible with 3.3V logic?","answer":"Yes. No external level shifter is needed when connecting to a 3.3 V microcontroller or FPGA."},{"question":"What is the difference between ISO7731DBQR and ISO7731DWR?","answer":"The ISO7731DWR comes in a wider SOIC-16 package (7.50 mm body width versus 3.90 mm for the DBQR's SSOP-16). The wider body provides more creepage distance for higher isolation voltage requirements, but the electrical specs — 100 Mbps, 3000 Vrms, 85 kV/µs CMTI — are identical. Footprint is the only difference that matters for the board layout."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISO7731DBQR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ISO7731DBQR 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}}