EMC1413 datasheet(18/52 Pages) SMSC

18 / 52 page

Multiple Channel 1°C Temperature Sensors with Beta Compensation

Datasheet

Revision 1.41 (02-23-12)

SMSC EMC1413 / EMC1414

DATASHEET

Chapter 6 Product Description

The EMC1413 / EMC1414 is an SMBus temperature sensor. The EMC1413 and EMC1414 monitor

one internal diode and up to two (EMC1413) or three (EMC1414) externally connected temperature

diodes.

Thermal management is performed in cooperation with a host device. This consists of the host reading

the temperature data of both the external and internal temperature diodes of the EMC1413 / EMC1414

and using that data to control the speed of one or more fans.

The EMC1413 and EMC1414 have two levels of monitoring. The first provides a maskable ALERT

signal to the host when the measured temperatures exceeds user programmable limits. This allows

the EMC1413 and EMC1414 to be used as an independent thermal watchdog to warn the host of

temperature hot spots without direct control by the host. The second level of monitoring provides a non

maskable interrupt on the THERM pin if the measured temperatures meet or exceed a second

programmable limit.

For the EMC1414, External Diode channels 2 and 3 are only compatible with general purpose diodes

(such as a 2N3904). For the EMC1413, the External Diode 2 channel is compatible with any diode

type.

Figure 6.1 shows a system level block diagram of the EMC1414 and Figure 6.2 shows a system level

block diagram of the EMC1413.

Figure 6.1 System Diagram for EMC1414

CPU / GPU

EMC1414

Host

DP1

DN1

SMDATA

Thermal

Junction

SMCLK

SMBus

Interface

THERM / ADDR

ALERT

Power Control

VDD

GND

VDD = 3.3V

3.3V – 5V

DN2 / DP3

DP2 / DN3

Optional

Anti-parallel

diode

EMC1413 Datenblatt(PDF) 18 Page - SMSC Corporation

EMC1413 Datenblatt(HTML) 18 Page - SMSC Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52

Datenblatt Download

Link URL