{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX6639ATE+T","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX6639ATET","canonicalUrl":"https://icboms.com/analog-devices/MAX6639ATET","factsUrl":"https://icboms.com/api/mcp/products/MAX6639ATE%2BT","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices MAX6639ATE+T, 2-Channel Temperature Monitor with Fan Control, ±2°C Local / ±1°C Remote Accuracy, I²C/SMBus, 3V-3.6V Supply, 16-TQFN (5x5 mm), -40°C to +125°C Operating.","salesMarkdown":"## Two-channel temp monitor with integrated fan drive The MAX6639ATE+T is a 2-channel temperature monitor from Analog Devices that also handles closed-loop fan control. It combines an internal temperature sensor, a remote diode-sensing channel, an ADC, a PWM fan-speed generator, and a tachometer counter in a single 16-pin TQFN package. The part is designed for thermal management in systems that need to monitor one local and one remote hot spot — CPU die, GPU core, or ambient — and drive a cooling fan proportionally. The remote channel delivers ±1°C maximum accuracy, which is tight enough for processor-grade thermal throttling thresholds. The local channel is rated at ±2°C maximum. Communication runs over I²C/SMBus, so the part integrates directly into the management bus common on server motherboards, base station controllers, and industrial compute modules. Supply range is 3V to 3.6V, matching a regulated 3.3V rail. The operating temperature span of -40°C to +125°C covers industrial and telecom enclosure environments. The 5x5 mm 16-TQFN with exposed pad needs a thermal land pattern on the PCB for proper heat sinking — the package itself dissipates the local sensor's self-heating. ## What the accuracy ratings mean for the BOM The ±1°C remote accuracy is the spec that decides fit. If the design monitors a CPU or FPGA die via a diode-connected transistor, this part keeps the reported temperature within 1°C of the actual junction. The remote sensing range extends from 0°C to 150°C, which covers the full operating envelope of most silicon junctions. The local sensor is specified over the -40°C to +125°C ambient range. Both channels report through the same I²C/SMBus interface, so one read transaction fetches both temperatures. ## Lifecycle and supply posture The MAX6639ATE+T carries an Active lifecycle status with ROHS3 compliance. For a production BOM, this part presents no imminent obsolescence risk.","metaTitle":"MAX6639ATE+T Temp Monitor, Fan Controller","metaDescription":"MAX6639ATE+T from Analog Devices: 2-channel temp monitor with fan control, ±1°C remote accuracy, I²C/SMBus, 3V-3.6V supply, 16-TQFN. Active, ROHS3.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tape & Reel (TR); Cut Tape (CT)","Accuracy":"±2°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":"$6.65","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$6.65000","currency":"USD"},{"qty":5,"price":"$5.86400","currency":"USD"},{"qty":10,"price":"$5.18000","currency":"USD"},{"qty":25,"price":"$4.20280","currency":"USD"},{"qty":50,"price":"$3.71420","currency":"USD"},{"qty":100,"price":"$3.61640","currency":"USD"},{"qty":500,"price":"$3.02994","currency":"USD"},{"qty":1000,"price":"$2.83446","currency":"USD"},{"qty":2500,"price":"$2.57040","currency":"USD"}]},"links":{"datasheetUrl":"https://cdn.icboms.com/56d795c8d3baaebf1291a99e14c4985f.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Is MAX6639ATE+T active or end-of-life?","answer":"The MAX6639ATE+T is Active per the manufacturer's lifecycle status. No end-of-life notification has been issued. It is suitable for new designs and production builds."},{"question":"What is the accuracy of MAX6639ATE+T?","answer":"The local temperature channel is accurate to ±2°C maximum. The remote diode-sensing channel is accurate to ±1°C maximum. The remote accuracy is the tighter spec and drives the part's use in processor thermal monitoring."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX6639ATET","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX6639ATET 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}}