{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX6639FATE+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX6639FATE","canonicalUrl":"https://icboms.com/analog-devices/MAX6639FATE","factsUrl":"https://icboms.com/api/mcp/products/MAX6639FATE%2B","rawCanonicalId":null},"summary":{"shortDescription":"Maxim Integrated MAX6639FATE+ dual-channel temperature monitor, internal and external sensor, ±1°C remote accuracy, I²C/SMBus output, PWM fan control, 3V–3.6V supply, 16-TQFN (5x5 mm), -40°C to 125°C operating range.","salesMarkdown":"## Two-channel temp monitor with integrated fan control The Maxim Integrated MAX6639FATE+ is a dual-channel temperature monitor that combines an internal sensor with support for one external diode-connected transistor, covering a remote sensing range of 0°C to 150°C. It integrates an ADC, a PWM generator for fan-speed control, and a tachometer counter for closed-loop fan monitoring. The part communicates over I²C or SMBus, making it a direct fit for server, telecom, and industrial equipment where thermal management of a CPU, GPU, or power stage is required. ## Accuracy that matters for closed-loop cooling Local temperature accuracy is -2.5°C maximum; remote accuracy is ±1°C maximum. ## 3.3 V rail, I²C bus, PWM fan drive Supply voltage runs from 3V to 3.6V. The I²C/SMBus interface handles standard bus speeds. ## Package and rework — 16-TQFN with exposed pad The part comes in a 16-TQFN (5x5 mm) with an exposed pad on the bottom. That pad needs a good thermal via pattern under it to pull heat into the board. ## Active production, no obsolescence concern For a BOM line that needs a dual temp monitor with fan control, this part is a current-design choice — not a legacy holdover.","metaTitle":"MAX6639FATE+ Temp Monitor, ±1°C Remote Accuracy, I²C","metaDescription":"MAX6639FATE+ dual-channel temperature monitor with ±1°C remote accuracy, I²C/SMBus output, PWM fan control. 3V–3.6V supply, 16-TQFN. Active production.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["DC-DC Power Modules"],"specifications":{"Package":"Strip","Accuracy":"-2.5°C Local(Max), ±1°C Remote(Max)","Function":"Fan Control, Temp Monitor","Topology":"ADC, PWM Generator, Tach Counter","Output Fan":"Yes","Output Type":"I²C/SMBus","Sensor Type":"Internal and External","Output Alarm":"Yes","Mounting Type":"Surface Mount","Package / Case":"16-WQFN Exposed Pad","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 3.6V","Sensing Temperature":"0°C ~ 150°C, External Sensor","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"16-TQFN (5x5)"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$4.58","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$4.58000","currency":"USD"},{"qty":10,"price":"$4.11000","currency":"USD"},{"qty":25,"price":"$3.88600","currency":"USD"},{"qty":100,"price":"$3.36780","currency":"USD"},{"qty":250,"price":"$3.19512","currency":"USD"},{"qty":500,"price":"$2.86698","currency":"USD"},{"qty":1000,"price":"$2.41794","currency":"USD"},{"qty":2500,"price":"$2.29704","currency":"USD"}]},"links":{"datasheetUrl":"https://www.analog.com/media/en/technical-documentation/data-sheets/MAX6639-MAX6639F.pdf","sourceUrl":null},"ai":{"faq":[{"question":"What is the accuracy of MAX6639FATE+?","answer":"The remote channel's ±1°C spec is the tighter one and drives fan-control decisions."},{"question":"Does MAX6639FATE+ support I2C and PWM fan control?","answer":"Yes. The output type is I²C/SMBus, and the topology includes a PWM generator and a tachometer counter, so it can read a fan's speed and adjust the PWM duty cycle accordingly."},{"question":"Is MAX6639FATE+ a direct replacement for MAX6639?","answer":"The MAX6639FATE+ is the same function as the base MAX6639 but in a 16-TQFN (5x5 mm) package. Verify the footprint matches your board layout before substituting — the base MAX6639 may be offered in a different package variant."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX6639FATE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX6639FATE 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}}