ADT7421 - ON Semiconductor

ADT7421 Precision Temperature Sensor

Positive Supply, 3.0 V to 3.6 V. Positive Connection to Remote Temperature Sensor. (Anode) Negative Connection to Remote Temperature Sensor. (Cathode) Open-drain Output. Can be used to turn a fan on/off or throttle a CPU clock in the event of an overtemperature condition. Requires pullup resistor. 5 GND Supply Ground Connection. 6 ALERT/THERM2 Open-drai.

Features

 On-chip and Remote Temperature Sensor
 0.25C Resolution on Remote Channel
 1C Resolution on Local Channel
 Automatically Cancels the Effect of Beta Variation in Thermal Transistors on Small Geometry CPU’s
 Automatically Cancels Up to 50 W (Typical) of Resistance in Series with Remote Transistor
 Extended, Switchable Temperature Measurement Range 0C to +125C (default) or −40C to +125C
 Pin- and Register-compatible with ADM1032, ADT7461, ADT7461A, EMC1402, and aSC7525
 2-wire SMBus Serial Interface with SMBus Alert Support
 Programmable Over/Undertemperature Limits
 Offset Regis.