{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"MAX6643LBFAEE+","brand":"Analog Devices","brandSlug":"analog-devices","productSlug":"MAX6643LBFAEE","canonicalUrl":"https://icboms.com/analog-devices/MAX6643LBFAEE","factsUrl":"https://icboms.com/api/mcp/products/MAX6643LBFAEE%2B","rawCanonicalId":null},"summary":{"shortDescription":"Analog Devices MAX6643LBFAEE+ Fan Control / Temp Monitor, ADC, PWM Generator, Tach Counter, Internal and External Sensor, PWM Output, 3V ~ 5.5V, -40°C ~ 125°C, 16-SSOP.","salesMarkdown":"## What the MAX6643LBFAEE+ does in a thermal management loop The Analog Devices MAX6643LBFAEE+ is a fan-speed controller and temperature monitor that combines an internal temperature sensor with support for an external remote diode. It uses an internal ADC to digitize both local and remote temperatures, then drives a PWM output to modulate fan speed based on the measured thermal profile. A tachometer counter reads the fan's speed feedback, and the alarm output signals overtemperature conditions. The ±3.5°C local and ±3°C remote accuracy (max) is the spec that decides whether this part fits a precision thermal management design. For a server chassis or telecom line card where every degree of margin matters, that accuracy window keeps the fan curve tight enough to avoid overspeed noise or underspeed overheating. Rated for the full -40°C to 125°C operating range, this part is suited for industrial enclosures, outdoor telecom cabinets, and automotive under-hood environments where the ambient can swing well beyond commercial limits. ## Supply voltage and package fit Mounting is surface-mount, standard for automated assembly lines. ## Lifecycle and sourcing reality The part is ROHS3 compliant.","metaTitle":"MAX6643LBFAEE+ Fan Controller, ±3.5°C Accuracy, 16-SSOP","metaDescription":"MAX6643LBFAEE+ from Analog Devices is an active fan controller with ±3.5°C local and ±3°C remote accuracy, PWM output, -40°C to 125°C range, 3V-5.5V supply.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":"ROHS3 Compliant","productStatus":"Active","categoryPath":["Discrete Semiconductors"],"specifications":{"Package":"Tube","Accuracy":"±3.5°C Local(Max), ±3°C Remote(Max)","Function":"Fan Control, Temp Monitor","Topology":"ADC, PWM Generator, Tach Counter","Output Fan":"Yes","Output Type":"PWM","Sensor Type":"Internal and External","Output Alarm":"Yes","Mounting Type":"Surface Mount","Package / Case":"16-SSOP (0.154\\\", 3.90mm Width)","lifecycle_stage":"eol_hot","Voltage - Supply":"3V ~ 5.5V","Sensing Temperature":"-40°C ~ 125°C, External Sensor","Operating Temperature":"-40°C ~ 125°C","Supplier Device Package":"16-QSOP"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":"$3.39","stockQuantity":0,"priceTiers":[{"qty":1,"price":"$3.39000","currency":"USD"},{"qty":10,"price":"$3.04600","currency":"USD"},{"qty":25,"price":"$2.88000","currency":"USD"},{"qty":100,"price":"$2.49600","currency":"USD"},{"qty":250,"price":"$2.36800","currency":"USD"},{"qty":500,"price":"$2.12480","currency":"USD"},{"qty":1000,"price":"$1.92000","currency":"USD"}]},"links":{"datasheetUrl":"https://datasheets.maximintegrated.com/en/ds/MAX6643-MAX6645.pdf","sourceUrl":null},"ai":{"faq":[{"question":"Does MAX6643LBFAEE+ require an external sensor for remote temperature?","answer":"Yes, it supports an external remote diode sensor in addition to its internal sensor. The remote sensor is required for the remote temperature measurement channel."},{"question":"What is the accuracy of the temperature measurement on MAX6643LBFAEE+?","answer":"Local accuracy is ±3.5°C maximum; remote accuracy is ±3°C maximum."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://icboms.com/analog-devices/MAX6643LBFAEE","citationPolicyUrl":"https://icboms.com/llms.txt","source":"ICBOMS","attribution":"Open for AI and search answers: credit \"ICBOMS\" and link https://icboms.com/analog-devices/MAX6643LBFAEE 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}}