MAX6643LBBAEE+T

$4.85

Description：IC CNTRLR FAN SPEED 16-QSOP
Series：-
Mfr：Analog Devices Inc./Maxim Integrated
Package：Tape & Reel (TR),Cut Tape (CT)

SKU:7923f06511e3 Category: Thermal Management Brand: Analog Devices Inc./Maxim Integrated

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Product introduction

MAX6643LBBAEE+T is listed in the Thermal Management range at ChipApex. The manufacturer field lists Analog Devices Inc./Maxim Integrated. Its product description is IC CNTRLR FAN SPEED 16-QSOP. Review the specifications below when checking this part for your BOM.

Thermal Management specifications for MAX6643LBBAEE+T

Description：IC CNTRLR FAN SPEED 16-QSOP
Series：-
Mfr：Analog Devices Inc./Maxim Integrated
Package：Tape & Reel (TR),Cut Tape (CT)
Function：Fan Control, Temp Monitor
Sensor Type：Internal and External
Sensing Temperature：-40°C ~ 125°C, External Sensor
Accuracy：±3.5°C Local(Max), ±3°C Remote(Max)
Topology：ADC, PWM Generator, Tach Counter
Output Type：PWM
Output Alarm：Yes
Output Fan：Yes
Voltage - Supply：3V ~ 5.5V
Operating Temperature：-40°C ~ 125°C
Grade：-
Qualification：-
Mounting Type：Surface Mount
Package / Case：16-SSOP (0.154", 3.90mm Width)
Supplier Device Package：16-QSOP

Thermal Management datasheet and documents for MAX6643LBBAEE+T

MAX6643LBBAEE+T

Thermal Management Overview

The MAX6643LBBAEE+T is an automatic PWM fan-speed controller with overtemperature output. It operates from a 3.0V to 5.5V supply and consumes 500µA typical current. The device monitors its own die temperature and one external diode-connected transistor. It features pin-selectable high-temperature (THIGH) and low-temperature (TLOW) thresholds in 5°C increments, and a pin-selectable overtemperature threshold. The unit provides a 32Hz PWM output for fan control, a FANFAIL alarm, and an OT output. It is housed in a 16-pin QSOP package.

Thermal Management Feature Summary

Monitors internal die and one external remote diode temperature
Generates 32Hz PWM waveform to drive external power transistor
Detects fan failure via tachometer, locked-rotor, or current sensing
Features FULLSPD input to force 100% duty cycle

Thermal Management Applications

Networking Equipment
Storage Equipment
Servers
Desktop Computers
Workstations

Thermal Management Procurement Notes

Verify the specific suffix 'B' indicates the factory-selected startup duty cycle configuration. Confirm the '+T' designation corresponds to tape-and-reel packaging. Ensure the component meets RoHS compliance requirements for the target assembly process. Cross-reference the manufacturer's latest documentation for any potential obsolescence notices or lifecycle changes.

Thermal Management Selection Notes

Select this part when monitoring both local and remote temperatures is required. The MAX6643 supports pin-selectable trip points for flexible thermal management. It is suitable for systems needing acoustic noise reduction through gradual duty-cycle adjustments. Verify compatibility with the fan type regarding tachometer or current-sense fault detection methods.

Thermal Management Part Context

This component belongs to the MAX664x family of automatic PWM fan-speed controllers. It shares functionality with the MAX6644 and MAX6645 but differs in sensor configuration. Unlike the MAX6644/MAX6645 which monitor only external sensors, the MAX6643 includes an internal die temperature sensor. All variants operate within the same voltage range and package options.