1°C Dual SMBus Sensor with Resistance Error Correction

Datasheet

SMSC EMC1002

3

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

.

Table 1.1 Pin Description

PIN

PIN NO.

DESCRIPTION

1

Supply Voltage, 3.0V to 3.6V.

DP

2

Anode connection for remote temperature diode.

DN

3

Cathode connection for remote temperature diode.

ADDR

4

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

GND

5

Ground.

ALERT

6

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

output. This is an open-drain output.

SMDATA

7

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

SMCLK

8

SMBus clock input.

Table 1.2 Ordering Information

PART NUMBER

ADDR

PULL-UP RESISTOR

SMBUS

ADDRESS

EMC1002-1

1k

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

8

7

6

5

1

2

3

4

V

DD

DP

DN

SMCLK

SMDATA

ALERT/THERM2

GND

ADDR/THERM