EMC1423/EMC1424 Features
	EMC1423/EMC1424 Applications
	EMC1423/EMC1424 Block Diagram
	Data Sheet, Application Notes, Drivers and Design Tools

General Description

The EMC1423 and EMC1424 are high accuracy, low cost, System Management Bus (SMBus) temperature sensors. Advanced features such as Resistance Error Correction (REC), Beta Compensation (to support CPU diodes requiring the BJT/transistor model including 45nm, 65nm and 90nm processors) and automatic diode type detection combine to provide a robust solution for complex environmental monitoring applications.

Additionally, the EMC1423 and EMC1424 provide a hardware programmable system shutdown feature that is programmed at part power-up via two pull-up resistor values and 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 EMC1423 monitors three temperature channels (two external and one internal). The EMC1424 monitors four temperature channels (three external and one internal).

Resistance Error Correction automatically eliminates the temperature error caused by series resistance allowing greater flexibility in routing thermal diodes. Beta Compensation eliminates temperature errors caused by low, variable beta transistors common in today's fine geometry processors. The automatic beta detection feature monitors each external diode/transistor and determines the optimum sensor settings for accurate temperature measurements regardless of processor technology. This frees the user from providing unique sensor configurations for each temperature monitoring application. These advanced features plus ±1°C measurement accuracy provide a low-cost, highly flexible and accurate solution for critical temperature monitoring applications.

Features

	Hardware Thermal Shutdown triggers dedicated SYS_SHDN pin hardware configured range 77°C to 112°C in 1°C steps cannot be disabled or modified by software
	Support for diodes requiring the BJT/transistor model
	Designed to support 45nm processors
	Support for 90nm and 65nm CPU diodes
	Automatically determines external diode type and optimal settings
	Resistance Error Correction
	External Temperature Monitors ±1°C Accuracy (60°C < TDIODE < 100°C) 0.125°C resolution Supports up to 2.2nF diode filter capacitor Anti-parallel diodes for extra diode support
	Internal Temperature Monitor ±2°C accuracy
	3.3V Supply Voltage
	Programmable temperature limits for ALERT#
	Small 10-pin MSOP Lead-free RoHS Compliant package

Applications

	Notebook Computers
	Desktop Computers
	Industrial
	Embedded applications

EMC1423/EMC1424 Data Sheet, Application Notes,
Drivers and Design Tools

Description	File Name	File Size	Date
EMC1423/EMC1424 Data Brief	1423_1424db.pdf	230K	4/17/09
EMC1423/EMC1424 Data Sheet	1423_1424.pdf	728K	4/17/09
Evaluation Board
EVB-EMC14xx    Schematic, PDF    Bill of Materials, PDF    Users Guide, PDF	evb14xxsch.pdf evb14xxbom.pdf evb14xxuser.pdf	107K 38K 1314K	8/28/06 12/13/06 12/14/06
Application Notes
Application Note 10-14: Using Temperature Sensing Diodes with EMC Devices - Remote Sensors	an1014.pdf	125K	4/13/09
Application Note 12-14: Remote Thermal Sensing Diode Selection Guide	an1214.pdf	216K	9/9/05
Application Note 13-19: Resistance Error Correction	an1319.pdf	210K	11/11/05
Application Note 14-0: SMBus Temperature Sensors from SMSC in an I2C System	an140.pdf	119K	12/12/05
Application Note 16-4: Using Anti-Parallel Diode (APD) with SMSC Temperature Sensors	an164.pdf	173K	4/1/09
Application Note 17-0: EMC142X Pullup Resistor Circuit Considerations	an170.pdf	97K	9/17/07
White Paper
White Paper 1-7: Portable Design Beyond ON/OFF Fan Control	wp17.pdf	175K	8/11/05
Other Information
Using the Adobe® Acrobat® Reader	aacrobat.html

Although the information in this document has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make changes to product descriptions and specifications at any time without notice. Contact your local SMSC sales office to obtain the latest specifications before placing your product order. The provision of this information does not convey any licenses under any patent rights or other intellectual property rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order. Products may contain design defects or errors known as anomalies which may cause a product's functions to deviate from published specifications. Anomaly sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well as the Terms of Sale Agreement, may be obtained by visiting SMSC's website at http://www.smsc.com. SMSC and the SMSC logo are registered trademarks of Standard Microsystems Corporation ("SMSC"). Other names mentioned may be trademarks of their respective holders. All claims made herein speak as of the date of this material. The company does not undertake to update such statements. (3/09)