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).

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