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