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