5-Channel Precision Temperature Monitor with Beta Compensation

The MAX6694 precision multichannel temperature sensor monitors its own temperature and the temperatures of up to four external diode-connected transistors. All temperature channels have programmable alert thresholds. Channels 1 and 4 also have programmable overtemperature thresholds. When the measured temperature of a channel exceeds the respective threshold, a status bit is set in one of the status registers. Two open-drain outputs, active-low OVERT and active-low ALERT, assert corresponding to these bits in the status register.

The 2-wire serial interface supports the standard system management bus (SMBus™) protocols: write byte, read byte, send byte, and receive byte for reading the temperature data and programming the alarm thresholds.

The MAX6694 is specified for a -40°C to +125°C operating temperature range and is available in 16-pin TSSOP and 5mm x 5mm thin QFN packages.

Applications

* Desktop Computers * Notebook Computers * Servers * Workstations

* Four Thermal-Diode Inputs

* Beta Compensation (Channel 1)

* Local Temperature Sensor

* 1.5°C Remote Temperature Accuracy (+60°C to +100°C)

* Temperature Monitoring Begins at POR for Fail-Safe System Protection

* Active-Low ALERT and Active-Low OVERT Outputs for Interrupts, Throttling, and Shutdown

* Active-Low STBY Input for Hardware Standby Mode

* Small, 16-Pin TSSOP and TQFN Packages

* 2-Wire SMBus Interface