{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"SI8640BD-B-IS2","brand":"Skyworks Solutions","brandSlug":"skyworks","productSlug":"SI8640BD-B-IS2","canonicalUrl":"https://icboms.com/skyworks/SI8640BD-B-IS2","factsUrl":"https://icboms.com/api/mcp/products/SI8640BD-B-IS2","rawCanonicalId":null},"summary":{"shortDescription":"Skyworks Solutions Si864x series, General Purpose Digital Isolator, SI8640BD-B-IS2, 4-channel unidirectional, 150 Mbps data rate, 5000 Vrms isolation, capacitive coupling, 16-SOIC wide-body package, -40°C to 125°C.","salesMarkdown":"## Active production — what it means for the BOM line The SI8640BD-B-IS2: This is the part to specify into a new design without planning a migration path. Skyworks Solutions lists it as ROHS3 compliant, so it clears EU RoHS exemption-free for medical, industrial, and automotive equipment shipped into Europe. ## Isolation barrier and transient immunity — the real-world limits Rated 5000 Vrms isolation — this is reinforced insulation class per IEC 60747-17, suitable for medical patient-contact isolation barriers and motor-drive safety isolation where the working voltage stays under 600 Vrms. Common-mode transient immunity is spec'd at 50 kV/µs minimum. That figure means the output does not glitch when a 1000 V/ns edge jumps across the isolation gap — exactly what happens when an IGBT switches a 600 V bus in a drive cabinet. ## Data rate and propagation — timing closure for isolated links 150 Mbps data rate covers full-speed SPI (up to 50 MHz SCK with margin), UART at any baud rate, and most parallel GPIO isolation links. The 13 ns max propagation delay (tpLH/tpHL) sets the loop timing floor — a closed-loop controller reading an isolated ADC at 10 MHz sees 26 ns round-trip delay through the isolator. Pulse-width distortion is 4.5 ns max, so a 50% duty-cycle clock at 50 MHz retains at least 46% duty after crossing the barrier — no duty-cycle restoration needed on the receiving side. Rise/fall time is 4 ns typical — edge rate fast enough to keep the signal integrity clean across a 10 cm PCB trace but slow enough to avoid excessive ringing on a 5 V rail. ## Channel direction and package — what the 4/0 input split means All four channels are unidirectional with inputs on Side 1 and outputs on Side 2 (4/0 split). No bidirectional data path — a half-duplex RS-485 link needs two channels (TX and RX) and cannot share one channel for both directions. The 16-SOIC wide-body (7.50 mm width) gives 8 mm creepage between the two sides, enough for 5000 Vrms reinforced isolation per IEC 60950-1. The 16-SOIC package dissipates about 1.2 W at 125°C ambient with minimal airflow; derate the supply current if all four channels run at 150 Mbps simultaneously in a hot enclosure. ## Sourcing and compliance — documentation on file Skyworks Solutions supplies the SI8640BD-B-IS2 in tube packaging. No UL, CSA, or VDE certificate numbers appear in the listing — verify the safety certification mark required by your end-equipment standard (IEC 62368-1, IEC 60601-1) against the Skyworks datasheet before committing the BOM.","metaTitle":"Skyworks SI8640BD-B-IS2 Digital Isolator, 150 Mbps","metaDescription":"Skyworks SI8640BD-B-IS2 general-purpose digital isolator, 4-channel unidirectional, 150 Mbps data rate, 5000 Vrms isolation, -40°C to 125°C.","metaKeywords":null},"attributes":{"series":"Si864x","packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Digital Isolators"],"specifications":{"Type":"General Purpose","Series":"Si864x","Package":"Tube","Data Rate":"150Mbps","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":"2.5V ~ 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)":"4ns, 4ns","Supplier Device Package":"16-SOIC","Pulse Width Distortion (Max)":"4.5ns","Propagation Delay tpLH / tpHL (Max)":"13ns, 13ns","Common Mode Transient Immunity (Min)":"50kV/µs"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.68","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.68000","currency":"USD"},{"qty":10,"price":"$4.20700","currency":"USD"},{"qty":46,"price":"$3.97696","currency":"USD"},{"qty":138,"price":"$3.44659","currency":"USD"},{"qty":276,"price":"$3.26989","currency":"USD"},{"qty":506,"price":"$2.93405","currency":"USD"},{"qty":1012,"price":"$2.47450","currency":"USD"},{"qty":2530,"price":"$2.35077","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/be2be0cd247effc5bbc93f4ca5c7a629.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the closest functional alternative to SI8640BD-B-IS2?","answer":"The SI8641BD-B-IS2 shares the same 4-channel count, 150 Mbps data rate, 5000 Vrms isolation, and 16-SOIC package, but its channel direction split is 3/1 (three channels Side 1 to Side 2, one channel Side 2 to Side 1) versus the SI8640BD-B-IS2's all-four-forward 4/0 split. If your design needs one reverse-direction channel, the SI8641BD-B-IS2 is a drop-in replacement on the same PCB footprint."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/skyworks/SI8640BD-B-IS2","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/skyworks/SI8640BD-B-IS2 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-07-22T19:45:10.375Z","lastPublished":"2026-07-22T19:45:10.375Z","indexable":true}}