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