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NCT7491 - Remote Thermal Monitor and Fan Controller

Datasheet Summary

Features

  • PECI 3.0 Master for CPU Monitoring.
  • SMBus Compatible Master.
  • On.
  • chip Temperature Sensor.
  • 2 Remote Sensor Channels.
  • Series Resistance Cancellation on Remote Sensors.
  • 3 PWM Fan Control Outputs.
  • 4 Tach Monitoring Input.
  • PWM Automatic Fan Speed Control.
  • 4 Analog Inputs for Voltage Monitoring.
  • Vdd Supply Voltage Monitoring.
  • PECI VTT Voltage Monitoring.
  • Overtemperature Outputs.

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Datasheet Details

Part number NCT7491
Manufacturer ON Semiconductor
File Size 936.64 KB
Description Remote Thermal Monitor and Fan Controller
Datasheet download datasheet NCT7491 Datasheet
Additional preview pages of the NCT7491 datasheet.

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Full PDF Text Transcription

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NCT7491 Remote Thermal Monitor and Fan Controller with PECI 3.0 Interface and SMBus Compatible Master The NCT7491 is a two−wire serially programmable hardware monitor. It can monitor 2 remote temperature zones and its own ambient temperature. A PECI 3.0 single wire interface allows the NCT7491 to monitor CPU temperatures. The NCT7491 also implements an SMBus compatible master, allowing it to read automatically from thermal sensors on the SMBus. The NCT7491 can automatically control the speed of 3 fans using PWM control, and monitor the speed of 4 fans. There are 4 analog inputs, used for measuring 12 V, 5 V, 2.5 V and Vccp channels. The NCT7491 supply voltage and PECI VTT voltage are also monitored.
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