EMC1002_07 Datasheet, PDF (3/21 Pages) SMSC Corporation – 1°C Dual SMBus Sensor

1°C Dual SMBus Sensor with Resistance Error Correction
Datasheet
Chapter 1 Pin Configuration
V_DD
DP
DN
ADDR/THERM
1
8
2 _{EMC1002 7}
3 ^{TOP VIEW} 6
4
5
SMCLK
SMDATA
ALERT/THERM2
GND
PIN
V_DD
DP
DN
ADDR/THERM
GND
ALERT/THERM2
SMDATA
SMCLK
Figure 1.1 EMC1002 Pin Configuration
Table 1.1 Pin Description
PIN NO.
DESCRIPTION
1
Supply Voltage, 3.0V to 3.6V.
2
Anode connection for remote temperature diode.
3
Cathode connection for remote temperature diode.
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
as V_DD.
5
Ground.
6
Logic output used as interrupt, SMBus alert or as a second THERM
output. This is an open-drain output.
7
SMBus data input/output. This is an open-drain output.
8
SMBus clock input.
PART NUMBER
EMC1002-1
EMC1002-2
Table 1.2 Ordering Information
ADDR/THERM
PULL-UP RESISTOR
1kΩ or greater
(If unused, connect to GND)
7.5kΩ ±5% Note 1.1 Note 1.2
12kΩ ±5% Note 1.2
20kΩ ±5% Note 1.2
33kΩ ±5% Note 1.2
SMBUS
ADDRESS
1001 100b
1001 100b
1001 101b
0111 100b
0111 101b
Note 1.1 This value must be greater than 1kΩ ±5% and less than or equal to 7.5kΩ ±5%.
Note 1.2 The pull-up resistor must be connected to V_DD (pin 1), less than 100pf capacitance on pin.
.
SMSC EMC1002
3
DATASHEET
Revision 1.4 (12-18-07)