General Description

The MAX6642 precise, two-channel digital temperature sensor accurately measures the temperature of its own die and a remote PN junction and reports the temperature data over a 2-wire serial interface. The remote PN junction is typically a substrate PNP transistor on the die of a CPU, ASIC, GPU, or FPGA. The remote PN junction can also be a discrete diode-connected small-signal transistor.

Benefits and Features

? Integrated Temperature Sensor Enables Simultaneous Dual Temperature (Remote and Local) Measurements

??? ? Remote Accuracy ±1°C

??? ? Local Accuracy ±2°C from +60°C to +100°C

??? ? Measures Remote Temperature up to +150°C

??? ? 0.25°C Resolution

? Dual Zone Monitoring Automates Over-Temperature Alarms

??? ? Programmable Remote/Local Temperature Thresholds

??? ? ALERT Output

? Small Footprint

??? ? 3mm x 3mm TDFN Package with Exposed Pad

??? ? Low Thermal Mass Reduces Measurement Latency

??? ? SMBus/I2C Address Hardwired

Applications

??? Desktop Computers

??? Notebook Computers

??? Servers

??? Thin Clients

??? Test and Measurement

??? Workstations

??? Graphic Cards