{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISO7731FQDBQRQ1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISO7731FQDBQRQ1","canonicalUrl":"https://icboms.com/texas-instruments/ISO7731FQDBQRQ1","factsUrl":"https://icboms.com/api/mcp/products/ISO7731FQDBQRQ1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISO7731FQDBQRQ1, General Purpose digital isolator, Automotive Grade, 100Mbps data rate, Capacitive Coupling, 3 channels, 3000Vrms isolation, 16-SSOP package, -40°C to 125°C.","salesMarkdown":"## 100 Mbps capacitive isolator with 85 kV/µs CMTI — the motor-drive choice The Texas Instruments ISO7731FQDBQRQ1 is a three-channel, unidirectional digital isolator built on capacitive coupling technology, rated for 100 Mbps data rate and 3000 Vrms isolation. The standout spec for inverter and motor-drive applications is the 85 kV/µs common-mode transient immunity — that's the margin that keeps data intact when a 600 V IGBT switches off in a few nanoseconds. The 2/1 input-side/side-2 channel split (two inputs on side 1, one on side 2) suits it for isolating a three-wire interface like SPI's SCLK, MOSI, and MISO where the chip-select stays on the controller side. ## AEC-Q100 grade and 125°C operation That covers under-hood electronics, engine control modules, and any board that lives near a heat source. ## Timing margins that matter Propagation delay is 16 ns max in both directions (tpLH and tpHL), with a pulse-width distortion ceiling of 4.9 ns. That's tight enough for 100 Mbps SPI or general-purpose isolation without worrying about duty-cycle skew accumulating over a long frame. Rise and fall times are 1.3 ns and 1.4 ns typical — fast edges mean clean signal integrity into a standard CMOS input, but they also mean the layout should keep the output trace short and avoid long stubs. No isolated power is provided on-chip; you supply the secondary-side Vcc separately. ## Package and footprint Housed in a 16-pin SSOP with 0.154\" body width and 3.90 mm width. It's a hand-solderable pitch — about 0.635 mm lead pitch — so a hobbyist with a fine-tip iron and some flux can mount it on a breakout board. Surface-mount only, naturally. The base product number is ISO7731, so the datasheet and app notes for that family apply directly.","metaTitle":"ISO7731FQDBQRQ1 Digital Isolator, 100Mbps, 3-Ch, 16-SSOP","metaDescription":"Texas Instruments ISO7731FQDBQRQ1 automotive-grade digital isolator. 100Mbps data rate, 3000Vrms isolation, 85kV/µs CMTI. AEC-Q100 qualified.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Mfr":"Texas Instruments","Type":"General Purpose","Grade":"Automotive","Series":"-","Data Rate":"100Mbps","Packaging":"Tape & Reel (TR) Cut Tape (CT)","Technology":"Capacitive Coupling","Part Status":"Active","Channel Type":"Unidirectional","Mounting Type":"Surface Mount","Qualification":"AEC-Q100","Isolated Power":"No","Package / Case":"16-SSOP (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.25V ~ 5.5V","Number of Channels":"3","Base Product Number":"ISO7731","Voltage - Isolation":"3000Vrms","Operating Temperature":"-40°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":"$2.0300","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d90a4d62e61a8af98bf9544de9b238cd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is ISO7731FQDBQRQ1 a direct replacement for the base ISO7731?","answer":"The ISO7731FQDBQRQ1 is the automotive-grade (AEC-Q100 qualified) variant of the ISO7731 family. If your design doesn't require automotive certification, the commercial ISO7731 may be a lower-cost alternative, but the FQDBQRQ1 will drop in as a direct replacement on the same PCB footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISO7731FQDBQRQ1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ISO7731FQDBQRQ1 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}}