View max6680-max6681 datasheet:

19-2305; Rev 0; 4/02 ±1°C Fail-Safe Remote/Local Temperature Sensors with SMBus Interface General Description Features The MAX6680/MAX6681 are precise, two-channel digi- Two Alarm Outputs: ALERT and OVERT tal thermometers. Each accurately measures the tem- Pin-Programmable Threshold for OVERT Limit perature of its own die and one remote PN junction and reports the temperature on a 2-wire serial interface. The Programmable Under/Overtemperature ALERT remote junction can be a diode-connected transistor Limit like the low-cost NPN type 2N3904 or PNP type 2N3906. The remote junction can also be a common- Dual Channel: Measures Remote and Local collector PNP, such as a substrate PNP of a micro- Temperature processor. 11-Bit, 0.125°C Resolution for Remote Temperature The