{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISO7221BD","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISO7221BD","canonicalUrl":"https://icboms.com/texas-instruments/ISO7221BD","factsUrl":"https://icboms.com/api/mcp/products/ISO7221BD","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISO7221BD, General Purpose digital isolator, 2 channels, 1/1 unidirectional, capacitive coupling, 5Mbps data rate, 2500Vrms isolation, 8-SOIC package, Tube, -40°C~125°C.","salesMarkdown":"## Two-channel isolator with capacitive coupling — what the specs mean for your design It provides one channel in each direction (1/1 unidirectional), so it fits interfaces like SPI where you need a clock going one way and data returning — no wasted channels. The 5 Mbps data rate and 70 ns max propagation delay (both directions) set the timing budget: for a 1 MHz SPI bus you have comfortable margin, but pushing toward 5 Mbps means accounting for the 70 ns latency plus the 3 ns pulse-width distortion in your setup/hold calculations. ## Isolation and noise immunity — 2500 Vrms and 25 kV/µs CMTI Rated for 2500 Vrms isolation, this part handles basic isolation in industrial drives, motor controls, and medical equipment where the barrier sees transient overvoltages but not sustained high-voltage DC. The 25 kV/µs common-mode transient immunity (minimum) means the output won't glitch when a motor drive switches a high-voltage rail — a spec that matters more than the isolation voltage for noisy environments. No isolated power is built in, so you still need a separate DC/DC or isolated module to power the secondary side if the application requires fully isolated power domains. For dual-sourcing resilience, the ISO7221 family includes the ISO7221B (same base number) — verify the exact suffix for your BOM, as the 'D' denotes the SOIC-8 package variant.","metaTitle":"ISO7221BD digital isolator, 5 Mbps, 2500 Vrms, SOIC-8","metaDescription":"TI ISO7221BD dual-channel digital isolator: 5 Mbps data rate, 2500 Vrms isolation, 25 kV/µs CMTI, -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":"-","Package":"Tube","Data Rate":"5Mbps","Technology":"Capacitive Coupling","Channel Type":"Unidirectional","Mounting Type":"Surface Mount","Isolated Power":"No","Package / Case":"8-SOIC (0.154\\\", 3.90mm Width)","Product Status":"Active","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 5.5V","Number of Channels":"2","Base Product Number":"ISO7221","Voltage - Isolation":"2500Vrms","Operating Temperature":"-40°C~125°C","Inputs - Side 1/Side 2":"1/1","Rise / Fall Time (Typ)":"1ns, 1ns","Supplier Device Package":"8-SOIC","Pulse Width Distortion (Max)":"3ns","Propagation Delay tpLH / tpHL (Max)":"70ns, 70ns","Common Mode Transient Immunity (Min)":"25kV/µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.6400","priceTiers":null},"links":{"datasheetUrl":"https://cdn.icboms.com/1712d03fe062b8dd6fd316c327e8b1ca.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/ISO7221BD/alternatives.json"},"ai":{"faq":[{"question":"What is the difference between ISO7221 and ISO7220?","answer":"The ISO7221 provides one channel in each direction (1/1 unidirectional), while the ISO7220 offers two channels in the same direction (2/0). Choose the ISO7221 when you need bidirectional isolation — for example, an SPI bus with one line each way — and the ISO7220 when both isolated signals travel the same direction."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISO7221BD","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ISO7221BD when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:49:49.435Z","lastPublished":"2026-08-11T15:49:49.435Z","indexable":true}}