View max6648-max6692 datasheet:

19-2545; Rev 0; 8/02 Precision SMBus-Compatible Remote/Local Temperature Sensors with Overtemperature Alarms General Description Features The MAX6648/MAX6692 are precise, two-channel digi- Dual Channel: Measures Remote and Local tal temperature sensors. They accurately measure the Temperature temperature of their own die and a remote PN junction, 0.125°C Resolution and report the temperature in digital form using a 2-wire serial interface. The remote PN junction is typically the High Accuracy: ±0.8°C (max) from +25°C to emitter-base junction of a common-collector PNP on a +125°C (Remote), and ±2°C (max) from +60°C to CPU, FPGA, or ASIC. +100°C (Local) The 2-wire serial interface accepts standard System Two Alarm Outputs: ALERT and OVERT Management Bus (SMBus)™ write