Microchip Technology, Inc. EMC1438

The EMC1438 is a high accuracy, low cost, System Management Bus (SMBus) temperature sensor. Advanced features such as Resistance Error Correction (REC), Beta Compensation (to CPU diodes requiring the BJT or transistor model) and automatic diode type detection combine to provide a robust solution for complex environmental monitoring applications. Additionally, the EMC1438 provides a hardware programmable system shutdown feature that is programmed at part power-up via a single TRIP_SET voltage channel that cannot be masked or corrupted through the SMBus. Each device provides ±1° accuracy for external diode temperatures and ±2°C accuracy for the internal diode temperature. The EMC1428 monitors up to eight temperature channels (up to seven external and one internal). Additional Features Features Hardware Thermal Shutdown triggers dedicated SYS_SHDN# pin hardware configured range 65°C to 127°C in 1°C steps cannot be disabled or modified by software Designed to support advanced CPU diodes Supports diodes requiring the BJT or transistor model Resistance Error Correction (up to 100 Ohms) Up to seven External Temperature Monitors ±1°C Accuracy (60°C < TDIODE < 100°C) 0.125°C Resolution Supports up to 2.2nF filter capacitor Anti-parallel diodes for extra diode support and compact design Internal Temperature Monitor ±2°C accuracy Report Hottest temperature of many SMBus Block Read / Write 3.3V Supply Voltage Available in a 16 pin 4mm x 4mm QFN RoHs Compliant package Programmable temperature limits for ALERT# Applications Notebook Computers Desktop Computers Industrial Embedded applications