EMC1424 SMSC Corporation, EMC1424 Datasheet

EMC1424

Manufacturer Part Number

EMC1424

Description

(EMC1423 / EMC1424) Temperature Sensor

Manufacturer

SMSC Corporation

Datasheet

1.EMC1424.pdf (45 pages)

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PRODUCT FEATURES

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 90nm

and 65nm CPU diodes) 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.

SMSC EMC1423/EMC1424

GENERAL DESCRIPTION

DATASHEET

Notebook Computers

Desktop Computers

Industrial

Embedded applications

Hardware Thermal Shutdown

Support for 90nm and 65nm CPU diodes

Automatically determines external diode type and

Resistance Error Correction

External Temperature Monitors

Internal Temperature Monitor

3.3V Supply Voltage

Programmable temperature limits for ALERT

Small 10-lead MSOP Lead-free RoHS Compliant

— triggers dedicated SYS_SHDN pin

— hardware configured range 77°C to 112°C in 1°C steps

— cannot be disabled or modified by software

optimal settings

— ±1°C Accuracy (60°C < T

— 0.125°C Resolution

— Supports up to 2.2nF diode filter capacitor

— Anti-parallel diodes for extra diode support

— ±2°C accuracy

Package

1°C Temperature

Sensor with Hardware

Thermal Shutdown

EMC1423/EMC1424

EMC1423/EMC1424 PIN DESCRIPTION

VDD

DN2

DN1

DP2

DP1

APPLICATIONS

FEATURES

DIODE

Revision 1.16 (03-15-07)

< 100°C)

SMDATA

SYS_SHDN

SMCLK

GND

ALERT

Datasheet

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