{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISO7420D","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISO7420D","canonicalUrl":"https://icboms.com/texas-instruments/ISO7420D","factsUrl":"https://icboms.com/api/mcp/products/ISO7420D","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISO7420D, General Purpose digital isolator, 2 unidirectional channels, 1 Mbps data rate, 2500 Vrms isolation, capacitive coupling, 8-SOIC package, -40°C to 105°C operating temperature.","salesMarkdown":"## What this digital isolator does — and who specifies it The Texas Instruments ISO7420D is a two-channel, unidirectional digital isolator using capacitive coupling to pass signals across a 2500 Vrms isolation barrier. It sits between a microcontroller's UART or SPI port and a sensor, motor-drive gate driver, or isolated power-stage controller — any place where you need to break ground loops or protect logic from high-voltage transients without losing signal integrity. Both channels drive from Side 1 to Side 2 (2/0 input count), so this part handles a one-way data path: e.g., SPI clock + data out from the MCU to an isolated ADC, or a pair of control signals to a relay driver. Data rate is 1 Mbps, which covers 1 MHz SPI, standard UART baud rates up to 1 Mbaud, and most slow-to-moderate-speed digital interfaces. Propagation delay is 14 ns max each way — tight enough that timing margin isn't a concern at this speed. Rise and fall times are 1 ns typical, giving clean edges without excessive ringing on short PCB traces. This lets you interface a 3.3 V MCU domain to a 5 V peripheral domain — common in industrial I/O, PLCs, and motor drives — without a separate level shifter. The part does not include an integrated isolated DC-DC converter, so you must provide isolated power to each side separately. That covers factory floors, outdoor telecom cabinets, engine bays, and most HVAC controllers. Common-mode transient immunity is rated at 25 kV/µs minimum, which is enough for motor-drive and inverter environments where fast-switching IGBTs or SiC FETs generate high dV/dt on the bus. At 1 Mbps, the ISO7420D is not a high-speed isolator — it won't carry 50 Mbps SPI or full-speed USB. But for the vast majority of industrial serial links (UART at 115200 baud, SPI at 1 MHz, I2C at 400 kHz) it has comfortable margin. The 14 ns propagation delay is negligible relative to a 1 µs bit period. If your design needs to push 10 Mbps or more, step up to the ISO7420FEDR (50 Mbps) or ISO7221CDR (25 Mbps) — both pin-compatible in the same 8-SOIC footprint. ## 2500 Vrms isolation — is it enough? 2500 Vrms is the basic isolation rating for this class of SOIC-8 digital isolator. It satisfies reinforced isolation requirements for most industrial equipment (IEC 60950-1, IEC 61010-1) as long as the working voltage stays within the derating curves. For 400 VAC motor drives or medical equipment needing 5 kV+ isolation, look at the ISO7830DWWR (5700 Vrms) in a wider SOIC-16 package — but that part is overkill and larger for a simple two-channel link. That means no last-time-buy window looming, no end-of-life risk for the foreseeable future. ## Sourcing and availability For tube quantities (50 per tube) or reel, submit an RFQ through the storefront. If you need a faster data rate or a different channel direction configuration, the ISO7420FEDR (50 Mbps, same footprint) is a direct alternative worth cross-shopping.","metaTitle":"ISO7420D Digital Isolator, 2 Ch, 1 Mbps, 2500 Vrms, SOIC-8","metaDescription":"TI ISO7420D general-purpose digital isolator: 2 unidirectional channels, 1 Mbps data rate, 2500 Vrms isolation, capacitive coupling, -40°C to 105°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Type":"General Purpose","Package":"Tube","Data Rate":"1Mbps","Technology":"Capacitive Coupling","Channel Type":"Unidirectional","Mounting Type":"Surface Mount","Isolated Power":"No","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3.15V ~ 3.45V, 4.75V ~ 5.25V","Number of Channels":"2","Voltage - Isolation":"2500Vrms","Operating Temperature":"-40°C ~ 105°C","Inputs - Side 1/Side 2":"2/0","Rise / Fall Time (Typ)":"1ns, 1ns","Supplier Device Package":"8-SOIC","Pulse Width Distortion (Max)":"3.7ns","Propagation Delay tpLH / tpHL (Max)":"14ns, 14ns","Common Mode Transient Immunity (Min)":"25kV/µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$5.04","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$5.04000","currency":"USD"},{"qty":10,"price":"$4.52600","currency":"USD"},{"qty":25,"price":"$4.27880","currency":"USD"},{"qty":100,"price":"$3.70820","currency":"USD"},{"qty":250,"price":"$3.51804","currency":"USD"},{"qty":500,"price":"$3.15672","currency":"USD"},{"qty":1000,"price":"$2.69100","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/8cf0f9b11fc93af016fd6c48cf18705c.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the data rate of ISO7420D?","answer":"The ISO7420D supports a maximum data rate of 1 Mbps. This is suitable for UART up to 1 Mbaud, 1 MHz SPI, and other moderate-speed serial interfaces."},{"question":"Is ISO7420D compatible with ISO7420FEDR?","answer":"The ISO7420FEDR is a higher-speed variant (50 Mbps vs 1 Mbps) in the same 8-SOIC footprint and pinout. Both are unidirectional, two-channel, 2500 Vrms isolators. The ISO7420FEDR is a drop-in replacement if you need more speed; otherwise the ISO7420D is the lower-cost option for 1 Mbps links."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISO7420D","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ISO7420D 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}}