View max6633 datasheet:

19-2120; Rev 0; 8/01 12-Bit Plus Sign Temperature Sensors with SMBus/I2C-Compatible Serial Interface General Description Features The MAX6633/MAX6634/MAX6635 combine a tempera- ¦ +3V to +5.5V Supply Range ture sensor, a programmable overtemperature alarm, ¦ Accuracy and an SMBus™/I2C™-compatible serial interface into ±1°C max (0°C to +50°C) a single package. They convert their die temperatures ±1.5°C max (-20°C to +85°C) into digital values using internal analog-to-digital con- ±2.5°C max (-40°C to +125°C) verters (ADCs). The result of the conversion is then held ±2.5°C typ (+150°C) in a temperature register as a 12-bit + sign value, allow- ¦ User-Programmable Temperature Thresholds ing 0.0625°C resolution, readable at any time through the serial interface. The devices ar