General Description
The MAX6646/MAX6647/MAX6649 are precise, two channel digital temperature sensors. The devices accurately measure the temperature of their own die and a remote PN junction, and report the temperature in digital form using a 2-wire serial interface. The remote PN junction is typically the emitter-base junction of a common collector PNP on a CPU, FPGA, or ASIC.

Features
♦ Dual Channel: Measures Remote and Local Temperature
♦ 0.125°C Resolution
♦ High Accuracy ±1°C (max) from +60°C to +145°C (Remote), and ±2°C (max) from +60°C to +100°C (Local)
♦ Measures High-Ideality Thermal Diodes Up to +170°C (Apparent) +145°C (Real)
♦ Two Alarm Outputs: ALERT and OVERT
♦ Programmable Under/Overtemperature Alarm Temperature Thresholds
♦ Programmable Conversion Rate
♦ SMBus-Compatible Interface
♦ SMBus Timeout

Applications
    Graphics Processors
    Desktop Computers
    Notebook Computers
    Servers
    Thin Clients
    Workstations
    Test and Measurement
    Multichip Modules