View max6683 datasheet:

19-2226; Rev 0; 10/01 Temperature Sensor and System Monitor in a 10-Pin µMAX General Description Features The MAX6683 system supervisor monitors multiple Monitors Local Temperature power-supply voltages, including its own, and also fea- Monitors Three External Voltages (1.8V, 2.5V, 5V tures an on-board temperature sensor. The MAX6683 Nominal) converts voltages to an 8-bit code and temperatures to an 11-bit (10-bit-plus-sign) code using an analog-to- Monitors VCC (3.3V Nominal) digital converter (ADC). A multiplexer automatically User-Programmable Voltage and Temperature sequences through the voltage and temperature mea- surements. The digitized signals are then stored in reg- Thresholds isters and compared to the over/underthreshold limits Alert Function with Abilit