{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISO7731FQDWRQ1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISO7731FQDWRQ1","canonicalUrl":"https://icboms.com/texas-instruments/ISO7731FQDWRQ1","factsUrl":"https://icboms.com/api/mcp/products/ISO7731FQDWRQ1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISO7731FQDWRQ1, Automotive AEC-Q100, 3-channel unidirectional digital isolator, capacitive coupling, 100Mbps data rate, 5000Vrms isolation, 2.25V-5.5V supply, -40°C to 125°C, 16-SOIC package.","salesMarkdown":"## Three-channel unidirectional isolation for automotive signal chains It provides 5000Vrms galvanic isolation across the barrier, with two channels on side 1 and one channel on side 2. The part operates from a 2.25V to 5.5V supply on both sides, supporting level translation between different voltage domains without an extra regulator. ## 100 Mbps data rate and timing margins Rated for 100 Mbps, this isolator handles SPI clock rates up to 50 MHz (double-edge) and general-purpose digital signals comfortably. The 16 ns max propagation delay in each direction and 4.9 ns max pulse-width distortion mean the timing budget for a 50 MHz SPI bus leaves roughly 4 ns of margin after accounting for driver and receiver delays — enough for most automotive sensor interfaces but worth checking against the specific controller's setup/hold requirements. ## 85 kV/µs CMTI — built for noisy power environments Common-mode transient immunity of 85 kV/µs minimum means this part reliably passes data across the isolation barrier when adjacent power stages are switching at tens of kV/µs — typical in traction inverters, DC-DC converters, and motor drives. The 1.3 ns typical rise and 1.4 ns fall times keep signal integrity clean even with fast edges, reducing radiated emissions concerns in EMC testing. ## Package and footprint: 16-SOIC wide-body Surface-mount assembly with standard reflow profiles; the wide-body gives 8 mm creepage distance, meeting reinforced isolation requirements per IEC 60747-17 for automotive and industrial safety applications. ## Automotive temperature range and qualification AEC-Q100 qualification means the part has passed the full suite of automotive stress tests including early-life failure, accelerated lifetime, and temperature cycling — a prerequisite for Tier-1 automotive ECU designs. ## Lifecycle and sourcing posture The base product number ISO7731 covers multiple channel-direction and output-default variants sharing the same 16-SOIC footprint, simplifying second-source qualification within the family.","metaTitle":"TI ISO7731FQDWRQ1 Digital Isolator, 3-Ch, 100Mbps, 5000Vrms","metaDescription":"Texas Instruments ISO7731FQDWRQ1 automotive digital isolator: 3 unidirectional channels, 100Mbps data rate, 5000Vrms isolation, AEC-Q100, -40°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":"Automotive, AEC-Q100","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":"-40°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":"$3.1600","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d90a4d62e61a8af98bf9544de9b238cd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can ISO7731FQDWRQ1 be used for SPI isolation?","answer":"Yes, the 100 Mbps data rate and 16 ns propagation delay support SPI clock rates up to 50 MHz (double-edge clocking). The three unidirectional channels map to SCLK, MOSI, and MISO in a typical SPI bus; a fourth chip-select signal would require a second device or a different channel count variant in the ISO7731 family."},{"question":"What is the closest pin-compatible alternative to ISO7731FQDWRQ1?","answer":"Within the ISO7731 family, the ISO7731FQDWQ1 is the commercial-temperature (0°C to 70°C) variant with the same pinout and 16-SOIC package."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISO7731FQDWRQ1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ISO7731FQDWRQ1 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}}