EMC1002_07 datasheet(3/21 Pages) SMSC

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1°C Dual SMBus Sensor with Resistance Error Correction

Datasheet

SMSC EMC1002

Revision 1.4 (12-18-07)

DATASHEET

Chapter 1 Pin Configuration

Figure 1.1 EMC1002 Pin Configuration

Note 1.1

This value must be greater than 1k

Ω ±5% and less than or equal to 7.5kΩ ±5%.

Note 1.2

The pull-up resistor must be connected to VDD (pin 1), less than 100pf capacitance on pin.

Table 1.1 Pin Description

PIN NO.

DESCRIPTION

VDD

Supply Voltage, 3.0V to 3.6V.

Anode connection for remote temperature diode.

Cathode connection for remote temperature diode.

ADDR

/THERM

Logic output that can be used to turn on/off a fan or throttle a CPU clock

in the event of an over-temperature condition. This is an open-drain

output. For the EMC1002-2, this pin is sampled following power up and

the value of the pull-up resistor determines the SMBus slave address per

Table 1.2 on page 3. Total capacitance on this pin must not exceed 100

pf, and the pull-up resistor must be connected to the same supply voltage

as VDD.

GND

Ground.

ALERT

/THERM2

Logic output used as interrupt, SMBus alert or as a second THERM

output. This is an open-drain output.

SMDATA

SMBus data input/output. This is an open-drain output.

SMCLK

SMBus clock input.

Table 1.2 Ordering Information

PART NUMBER

ADDR

/THERM

PULL-UP RESISTOR

SMBUS

ADDRESS

EMC1002-1

Ω or greater

(If unused, connect to GND)

1001 100b

EMC1002-2

7.5k

Ω ±5% Note 1.1 Note 1.2

1001 100b

12k

Ω ±5% Note 1.2

1001 101b

20k

Ω ±5% Note 1.2

0111 100b

33k

Ω ±5% Note 1.2

0111 101b

EMC1002

TOP VIEW

SMCLK

SMDATA

ALERT/THERM2

GND

ADDR/THERM

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