{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"ISO7821LLDWR","brand":"Texas Instruments","brandSlug":"texas-instruments","productSlug":"ISO7821LLDWR","canonicalUrl":"https://icboms.com/texas-instruments/ISO7821LLDWR","factsUrl":"https://icboms.com/api/mcp/products/ISO7821LLDWR","rawCanonicalId":null},"summary":{"shortDescription":"Texas Instruments ISO7821LLDWR, General Purpose digital isolator, Capacitive Coupling, 2 Channel, Unidirectional, 100Mbps Data Rate, 5700Vrms Isolation, 16-SOIC (7.50mm width), -55°C to 125°C.","salesMarkdown":"## What the 5700Vrms and 100kV/µs CMTI mean for your isolation barrier The Texas Instruments ISO7821LLDWR is a 2-channel, unidirectional digital isolator built on capacitive coupling technology. Its 5700Vrms isolation voltage and 100kV/µs common-mode transient immunity (CMTI) make it a fit for systems where high-voltage safety isolation and noise rejection are non-negotiable — think motor drives, grid-tied inverters, medical patient monitoring, and industrial fieldbus interfaces that must survive fast switching edges without corrupting data. ## 100Mbps data rate — throughput for the bus At 100Mbps, this part handles isolated SPI, UART, and CAN traffic without bottlenecking the link. The 25ns propagation delay (max) and 4.5ns pulse-width distortion keep timing margins tight enough for most synchronous interfaces. If your design runs a faster serial protocol (e.g., 150Mbps+), you will need a higher-speed isolator; for the majority of industrial and instrumentation buses, 100Mbps is the sweet spot that avoids over-spending on speed you do not use. ## Supply range and isolated power — what you need on the rails The supply range spans 2.25V to 5.5V on both sides, so it works with 3.3V or 5V logic without a separate regulator. Note that the part does not include an integrated isolated DC-DC converter — you will need a separate isolated power module or a transformer driver to power the secondary side. Plan for a small 1µF decoupling cap per supply pin, placed close to the package. ## Package and temperature grade — board-level fit Housed in a 16-SOIC wide-body (7.50mm width) package, it offers 8.5mm creepage distance typical for reinforced isolation at this voltage. Surface-mount assembly is straightforward;. The part is ROHS3 compliant.","metaTitle":"TI ISO7821LLDWR Digital Isolator, 5700Vrms, 100Mbps, 16-SOIC","metaDescription":"Texas Instruments ISO7821LLDWR general-purpose capacitive coupling digital isolator. 5700Vrms isolation, 100Mbps data rate, 100kV/µs CMTI, -55°C to 125°C.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Type":"General Purpose","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)","lifecycle_stage":"eol_hot","Voltage - Supply":"2.25V ~ 5.5V","Number of Channels":"2","Voltage - Isolation":"5700Vrms","Operating Temperature":"-55°C ~ 125°C","Inputs - Side 1/Side 2":"1/1","Supplier Device Package":"16-SOIC","Pulse Width Distortion (Max)":"4.5ns","Propagation Delay tpLH / tpHL (Max)":"25ns, 25ns","Common Mode Transient Immunity (Min)":"100kV/µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$8.55","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$8.55000","currency":"USD"},{"qty":10,"price":"$7.72100","currency":"USD"},{"qty":25,"price":"$7.36200","currency":"USD"},{"qty":100,"price":"$6.39250","currency":"USD"},{"qty":250,"price":"$6.10516","currency":"USD"},{"qty":500,"price":"$5.56648","currency":"USD"},{"qty":1000,"price":"$5.08200","currency":"USD"},{"qty":2000,"price":"$5.08200","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/601747114388750071a7688359c1b857.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does ISO7821LLDWR require isolated power supplies?","answer":"Yes — the part does not include an integrated isolated DC-DC converter. You must provide separate, isolated power to each side (VCC1 and VCC2) within the 2.25V to 5.5V range."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/texas-instruments/ISO7821LLDWR","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/texas-instruments/ISO7821LLDWR 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}}