{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISO7731QDBQRQ1","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISO7731QDBQRQ1","canonicalUrl":"https://icboms.com/texas-instruments/ISO7731QDBQRQ1","factsUrl":"https://icboms.com/api/mcp/products/ISO7731QDBQRQ1","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISO7731QDBQRQ1, Automotive AEC-Q100, 3-channel digital isolator, capacitive coupling, 100Mbps data rate, 3000Vrms isolation, 2.25V-5.5V supply, -40°C to 125°C, 16-SSOP package.","salesMarkdown":"## 3000Vrms isolation, 100Mbps — the automotive-grade digital isolator for noisy power trains The Texas Instruments ISO7731QDBQRQ1 is a 3-channel, unidirectional digital isolator using capacitive coupling technology, designed for automotive and industrial applications requiring galvanic isolation up to 3000Vrms. It supports a data rate of 100Mbps with propagation delays of 16ns max and pulse-width distortion under 4.9ns, making it suitable for isolating high-speed SPI, UART, and CAN buses in electric vehicle traction inverters, battery management systems, and on-board chargers. ## 85kV/µs CMTI — why it matters for motor-drive and inverter isolation Common-mode transient immunity (CMTI) is rated at a minimum of 85kV/µs, which means this isolator maintains data integrity when fast-switching IGBTs or SiC MOSFETs slam the ground reference by thousands of volts per microsecond. In a traction inverter or DC-DC converter, that CMTI floor prevents bit errors and false triggering on the digital interface. The 1.3ns rise and 1.4ns fall times (typical) keep signal edges clean for 100Mbps signaling even with the capacitive coupling path. ## 2/1 channel configuration and supply flexibility The ISO7731QDBQRQ1 provides two channels on side 1 and one channel on side 2, a common split for isolating a 3-wire SPI bus (SCLK, MOSI on the primary side, MISO on the secondary) or a CAN transceiver with TX/RX and an enable signal. The supply range spans 2.25V to 5.5V on both sides, so it interfaces directly with 3.3V and 5V logic domains without external level shifters. No isolated DC-DC converter is integrated — plan for a separate isolated power supply or a device with integrated power if board space is tight. ## Package and footprint for production The 16-SSOP footprint is common across TI's ISO773x family, so a board layout can accommodate multiple density options without a PCB respin. The automotive-grade qualification also implies the device has passed the full suite of stress tests (high-temperature operating life, temperature cycling, ESD, latch-up) required by Tier-1 automotive suppliers. If dual-sourcing is a concern, the ISO7731 base product number shares the same footprint and pinout across the Q and non-Q variants, though only the QDBQRQ1 carries the AEC-Q100 stamp.","metaTitle":"ISO7731QDBQRQ1 Digital Isolator, 100Mbps, 3000Vrms, AEC-Q100","metaDescription":"Texas Instruments ISO7731QDBQRQ1 automotive-grade digital isolator: 3-channel, 100Mbps data rate, 3000Vrms isolation, capacitive coupling, -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-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":"-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":"$1.4175","stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/d90a4d62e61a8af98bf9544de9b238cd.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is ISO7731QDBQRQ1 compatible with 3.3V systems?","answer":"Yes. The supply voltage range of 2.25V to 5.5V on both sides means the ISO7731QDBQRQ1 operates directly from a 3.3V rail without external level translation. The logic inputs and outputs are ratiometric to the respective side's supply."},{"question":"What is the difference between ISO7731 and ISO7730?","answer":"The ISO7731 provides a 2/1 channel configuration (two channels on side 1, one on side 2), while the ISO7730 offers a 3/0 configuration (all three channels on side 1). Both share the same 16-SSOP package, 100Mbps data rate, 3000Vrms isolation, and AEC-Q100 qualification. The choice depends on the directionality of the signals being isolated."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISO7731QDBQRQ1","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ISO7731QDBQRQ1 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}}