DS75 Thermometer

SDA 1 -DS75- 8 VCC
SCL 2 7 A0
TOS 3 6 A1
GND 4 5 A2
Pin Names and functions
A0 - A2 Address Inputs
TOS Thermostat output stage can be made either like a comparator or an interrupt.
SDA, SCL I2C bus
Vcc Power (2V7 to 5V5 DC)
GND Ground
Address = 1 0 0 1 a2 a1 a0 r/!w

This is available in DIP and SO8 packages, and the smaller package is desirable because the smaller mass means it is quicker to respond to temperature changes. It is also better if it has to be mounted in a probe for insertion into anything (or anyone!).