{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"TC655EUN","brand":"Microchip Technology","brandSlug":"microchip","productSlug":"TC655EUN","canonicalUrl":"https://icboms.com/microchip/TC655EUN","factsUrl":"https://icboms.com/api/mcp/products/TC655EUN","rawCanonicalId":null},"summary":{"shortDescription":"Microchip Technology TC655EUN BLDC fan speed controller, I²C interface, 3V-5.5V supply, pre-driver low-side output, 10-MSOP package, tube.","salesMarkdown":"## What the function ratings mean for fit The TC655EUN is a speed controller for brushless DC (BLDC) fans — it handles the commutation logic and speed regulation, not the power stage directly. The pre-driver low-side (2) output drives two external N-channel MOSFETs that switch the fan windings. Speed and fault monitoring happen over the I²C interface — the host microcontroller reads tachometer feedback and sets the target duty cycle over a two-wire bus, saving GPIO pins on the main controller. Supply range is 3V to 5.5V from a single rail — the same rail that powers the fan's logic can feed the controller, simplifying the power tree on a fan-control PCB. ## Temperature grade and package constraints Housed in a 10-MSOP package (3.00 mm width) — the 0.50 mm pitch demands careful PCB layout for the I²C pull-up resistors and the gate-drive traces to the external MOSFETs, but the footprint is compact enough for a 2-layer board. ## Compliance and documentation ROHS3 compliant — no restricted substances above the threshold limits, no exemption expiry to track for EU or global BOMs. Supplied in tube packaging — the 10-MSOP parts ship in antistatic tubes; for reel or tape-and-reel quantities, confirm the packing option at RFQ.","metaTitle":"Microchip TC655EUN BLDC Fan Speed Controller, 3V-5.5V","metaDescription":"Active Microchip TC655EUN BLDC fan speed controller. I²C interface, 3V-5.5V supply, -40°C to 85°C. 10-MSOP package. ROHS3. Quoted to order.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Function":"Controller - Speed","Interface":"I²C","Applications":"Fan Controller","Mounting Type":"Surface Mount","Package / Case":"10-TFSOP, 10-MSOP (0.118\\\", 3.00mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 5.5V","Motor Type - AC, DC":"Brushless DC (BLDC)","Output Configuration":"Pre-Driver - Low Side (2)","Operating Temperature":"-40°C ~ 85°C (TA)","Supplier Device Package":"10-MSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$2.81","priceTiers":[{"qty":1,"price":"$2.81000","currency":"USD"},{"qty":25,"price":"$2.34280","currency":"USD"},{"qty":100,"price":"$2.12000","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/a099d5005f26e7a7c71da5a71a8c4df6.pdf","sourceUrl":null,"alternativesUrl":"https://icboms.com/api/mcp/products/TC655EUN/alternatives.json"},"ai":{"faq":[{"question":"How do I get current pricing and availability for TC655EUN?","answer":"Submit an RFQ against your BOM quantity."},{"question":"What compliance documentation does Microchip Technology provide for TC655EUN?","answer":"The TC655EUN is ROHS3 compliant. Microchip provides the standard RoHS certificate of compliance and material declaration. No UL or IEC certification is listed on the product record."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/microchip/TC655EUN","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/microchip/TC655EUN 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}}