EMC1403/EMC1404
1°C Temperature
Sensor with Beta
Compensation
PRODUCT FEATURES
GENERAL DESCRIPTION
The EMC1403 and EMC1404 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.
Each device provides ±1° accuracy for external diode
temperatures and ±2°C accuracy for the internal diode
temperature. The EMC1403 monitors three temperature
channels (two external and one internal). The EMC1404
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.
APPLICATIONS
Notebook Computers
Desktop Computers
Industrial
Embedded applications
Datasheet
FEATURES
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 < T
DIODE
< 100°C)
— 0.125°C Resolution
— Anti-parallel diodes for extra diode support
Internal Temperature Monitor
— ±2°C accuracy
3.3V Supply Voltage
Programmable temperature limits for ALERT and
THERM
Small 10-lead MSOP Lead-free RoHS Compliant
Package
EMC1403/EMC1404 PIN DESCRIPTION
VDD
DP1
DN1
DP2
DN2
1
2
3
4
5
10
9
8
7
6
SMCLK
SMDATA
ALERT
THERM
GND
SMSC EMC1403/EMC1404
DATASHEET
Revision 1.16 (03-15-07)
SMSC [ SMSC CORPORATION ]
