DESCRIPTION
The DS1780 is a highly integrated system instrumentation monitor ideal for use in personal computers, or any microprocessor-based system. It monitors ambient temperature, six power supply voltages, and the speed of two fans. Fan speed can also be controlled with the use of an internal 8-bit DAC. All measurements are internally converted to a digital format for easy processing by the CPU.

FEATURES
■ Direct-to-digital temperature sensor requires no external components or user calibration
■ Two fan speed sensors
■ Monitors 6 power supply voltages
■ 8-bit DAC for fan speed control
■ Intrusion detect for security (detects when chassis lid has been removed, even if power is off)
■ Remote system reset
■ System interrupt availability on all monitored functions (temperature, voltages, fan speed, chassis intrusion)
■ 2-wire interface with 2-bit addressability
■ Integrated NAND TREE for board level testability
■ Wide power supply range (2.8V ≤ VDD ≤ 5.75V)
■ High integration in a small 24-pin 173-mil TSSOP
■ Applications include monitoring of personal computers or any microprocessor-based system