MAX6642ATT9C+T

MAX6642ATT9C+T Benefits and Features

● Integrated Temperature Sensor Enables SimultaneousDual 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-TemperatureAlarms • Programmable Remote/Local TemperatureThresholds • ALERT Output● Small Footprint • 3mm x 3mm TDFN Package with Exposed Pad • Low Thermal Mass Reduces Measurement Latency • SMBus/I2C Address Hardwired

MAX6642ATT9C+T General Description

The MAX6642 precise, two-channel digital temperaturesensor accurately measures the temperature of its owndie and a remote PN junction and reports the temperaturedata over a 2-wire serial interface. The remote PN junctionis typically a substrate PNP transistor on the die of a CPU,ASIC, GPU, or FPGA. The remote PN junction can also bea discrete diode-connected small-signal transistor.The 2-wire serial interface accepts standard systemmanagement bus (SMBus™), Write Byte, Read Byte,Send Byte, and Receive Byte commands to read thetemperature data and to program the alarm thresholds.To enhance system reliability, the MAX6642 includesan SMBus timeout. The temperature data format is 10bit with the least significant bit (LSB) corresponding to+0.25°C. The ALERT output asserts when the local orremote overtemperature thresholds are violated. A faultqueue may be used to prevent the ALERT output fromsetting until two consecutive faults have been detected.Measurements can be done autonomously or in a single-shot mode.Remote accuracy is ±1°C maximum error between +60°Cand +100°C. The MAX6642 operates from -40°C to+125°C, and measures remote temperatures between0°C and +150°C. The MAX6642 is available in a 6-pinTDFN package with an exposed pad.

MAX6642ATT9C+T Applications

● Desktop Computers● Notebook Computers● Servers● Thin Clients