{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISO6740FDWR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISO6740FDWR","canonicalUrl":"https://icboms.com/texas-instruments/ISO6740FDWR","factsUrl":"https://icboms.com/api/mcp/products/ISO6740FDWR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISO6740FDWR, series ISO674x, quad-channel unidirectional digital isolator, 50 Mbps data rate, 5000 Vrms isolation, capacitive coupling, 16-SOIC package, -40°C to 125°C, 2.25 V to 5.5 V supply.","salesMarkdown":"The Texas Instruments ISO6740FDWR is a quad-channel, unidirectional digital isolator using capacitive coupling to pass signals across an isolation barrier rated for 5000 Vrms. It supports common industrial bus protocols — CAN, RS-232, RS-485, and SPI — at data rates up to 50 Mbps. The four channels are all on the input side (side 1), making it a straight-through forward-direction isolator for applications like isolated SPI, RS-485 transceiver isolation, or CAN bus node isolation. ## Package and mounting The 50 Mbps data rate covers the vast majority of industrial serial links: SPI at 20–40 MHz clock, RS-485 at 10–50 Mbps, and CAN FD at up to 8 Mbps. The 2.6 ns typical rise/fall time keeps edge rates fast enough for clean eye diagrams at 50 Mbps but not so fast that PCB layout becomes a high-frequency nightmare — standard 4-layer board practices with a solid ground plane under the isolator will work. The 100 kV/µs minimum common-mode transient immunity (CMTI) is the spec that matters in motor-drive and inverter environments: when the IGBT or SiC FET switches, the ground plane can bounce several hundred volts in a microsecond. A CMTI of 100 kV/µs means the output won't glitch or latch when that happens, which is why this part is a common choice for isolated gate-driver feedback and phase-current sensing. ## Package and mounting The ISO6740FDWR comes in a 16-pin SOIC with 7.50 mm body width — the wide-body variant, not the narrow 3.9 mm SOIC. That wider package gives 8 mm creepage between input and output sides, which is what you need to maintain the 5000 Vrms isolation rating in your end equipment. For the rework bench: the SOIC-16 wide body is a straightforward hot-air removal at 340°C with a 5 mm nozzle, no underfill to worry about. The wide body has more thermal mass than a narrow SOIC, so give the preheat an extra 10 seconds before lifting the part — will it survive the hot air? Yes, easily, as long as you don't cook it past 260°C peak at the joint. ## Lifecycle and sourcing The part is ROHS3 compliant. If you need a dual-source option for production resilience, the ISO6742FDWR is the same series with a 2/2 input/output split — functionally similar but with two channels reversed, so check your direction requirements before substituting.","metaTitle":"ISO6740FDWR Quad-Channel Digital Isolator, 50 Mbps","metaDescription":"TI ISO6740FDWR quad-channel capacitive isolator, 50 Mbps data rate, 5000 Vrms isolation, -40°C to 125°C.","metaKeywords":null},"attributes":{"series":"ISO674x","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Type":"CAN, RS232, RS485, SPI","Series":"ISO674x","Package":"Tape & Reel (TR); Cut Tape (CT)","Data Rate":"50Mbps","Technology":"Capacitive Coupling","Channel Type":"Unidirectional","Mounting Type":"Surface Mount","Isolated Power":"No","Package / Case":"16-SOIC (0.295\\\", 7.50mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.25V ~ 5.5V","Number of Channels":"4","Voltage - Isolation":"5000Vrms","Operating Temperature":"-40°C ~ 125°C","Inputs - Side 1/Side 2":"4/0","Rise / Fall Time (Typ)":"2.6ns, 2.6ns","Supplier Device Package":"16-SOIC","Pulse Width Distortion (Max)":"7ns","Propagation Delay tpLH / tpHL (Max)":"18ns, 18ns","Common Mode Transient Immunity (Min)":"100kV/µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.85","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$2.85000","currency":"USD"},{"qty":10,"price":"$2.55600","currency":"USD"},{"qty":25,"price":"$2.41120","currency":"USD"},{"qty":100,"price":"$2.05450","currency":"USD"},{"qty":250,"price":"$1.92912","currency":"USD"},{"qty":500,"price":"$1.68796","currency":"USD"},{"qty":1000,"price":"$1.39860","currency":"USD"},{"qty":2000,"price":"$1.30214","currency":"USD"},{"qty":6000,"price":"$1.25392","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/efa6363caf88d387bc81027b98205562.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Can ISO6740FDWR be used for RS485 isolation?","answer":"Yes. The ISO6740FDWR is listed for RS-485, RS-232, CAN, and SPI interface isolation. The 50 Mbps data rate and 5000 Vrms isolation cover isolated RS-485 links at common baud rates up to 50 Mbps. The unidirectional channel configuration (all four inputs on side 1) works with half-duplex RS-485 when you use an external direction-control signal on the transceiver's DE pin."},{"question":"What is the closest alternative or replacement for ISO6740FDWR?","answer":"The closest functional alternative within the same ISO674x series is the ISO6742FDWR. The key difference is channel direction: the ISO6740FDWR has all four channels forward (side 1 to side 2), while the ISO6742FDWR has a 2/2 split (two forward, two reverse). Both share the same 50 Mbps data rate, 5000 Vrms isolation, 100 kV/µs CMTI, and 16-SOIC package. Choose the ISO6742FDWR if your design needs bidirectional isolation on two channels."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISO6740FDWR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ISO6740FDWR 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}}