General Description

The MAX6639 monitors its own temperature and one external diode-connected transistor or the temperatures of two external diode-connected transistors, typically available in CPUs, FPGAs, or GPUs.

Features

♦ Two Thermal-Diode Inputs

♦ Up to 25kHz PWM Output Frequency

♦ Three Selectable SMBus Addresses

♦ Local Temperature Sensor

♦ 1°C Remote Temperature Accuracy

♦ Two PWM Outputs for Fan Drive (Open Drain; Can

   be Pulled Up to +13.5V)

♦ Programmable Fan-Control Characteristics

♦ Automatic Fan Spin-Up Ensures Fan Start

♦ Controlled Rate-of-Change Ensures Unobtrusive

   Fan-Speed Adjustments

♦ ±3 Fan-Speed Measurement Accuracy

♦ Temperature Monitoring Begins at POR for

   FailSafe System Protection

♦ OT and THERM Outputs for Throttling or Shutdown

♦ Measures Temperatures Up to +150°C

♦ MAX6639F is Optimized for n = 1.021 for Penryn

   Compatibility

Applications

   Desktop Computers

   Notebook Computers

   Projectors

   Servers

   Networking Equipment