MAX6639 Overview
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. The 2-wire serial interface accepts standard System Management Bus (SMBus TM ) write byte, read byte, send byte, and receive byte mands to read the temperature data and program the alarm thresholds. Temperature data can be...
MAX6639 Key Features
- 2 Thermal-Diode Inputs
- Up to 25kHz PWM Output Frequency
- 3 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