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LM40 - Hardware Monitor

General Description

The LM40 is a hardware monitor that measures 3 temperature zones, 5 voltages and has a single-wire interface compatible with National Semiconductor’s SensorPath bus.

SensorPath data is pulse width encoded, thereby allowing the LM40 to be easily connected to many general purpose micro-controllers.

Key Features

  • n SensorPath Interface.
  • 2 hardware programmable addresses n Voltage Monitoring.
  • 9-bit Σ∆ ADC Typical.

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Full PDF Text Transcription (Reference)

The following content is an automatically extracted verbatim text from the original manufacturer datasheet and is provided for reference purposes only.

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LM40 Hardware Monitor with Dual Thermal Diodes and SensorPath™ Bus May 2004 LM40 Hardware Monitor with Dual Thermal Diodes and SensorPath™ Bus General Description The LM40 is a hardware monitor that measures 3 temperature zones, 5 voltages and has a single-wire interface compatible with National Semiconductor’s SensorPath bus. SensorPath data is pulse width encoded, thereby allowing the LM40 to be easily connected to many general purpose micro-controllers. Several National Semiconductor Super I/O products include a fully integrated SensorPath master, that when connected to the LM40 can realize a hardware monitor function that includes limit checking for measured values, autonomous fan speed control and many other functions.