View max6655 datasheet:

19-2117; Rev 0; 7/01 Dual Remote/Local Temperature Sensors and Four-Channel Voltage Monitors General Description Features The MAX6655/MAX6656 are precise voltage and tem- ¦ Three Temperature Channels perature monitors. The digital thermometer reports the Two Remote PN Junctions temperature of two remote sensors and its own die tem- One Local Sensor perature. The remote sensors are diode-connected ¦ Four Voltage Channels transistors—typically a low-cost, easily mounted 2N3906 PNP type—that replace conventional thermis- +12V, +5V, +3.3V, +2.5V tors or thermocouples. Remote accuracy is ±1°C for Three External Monitors multiple transistor manufacturers with no calibration One Internal Supply Monitor necessary. The remote channels can also measure the ¦ 11-Bit, 0.125°C Resol