Datasheet
1
2
3
4
8
7
6
5
V+
SCL
GND
DXP
DXN
A1
A0
SDA
TMP421
V+
SCL
SDA
DXP
DXN
A1
A0
1
2
8
7
3
4
6
5
GND
TMP421C
1
2
3
4
8
7
6
5
V+
SCL
GND
DX1
DX2
DX3
DX4
SDA
TMP422
TMP421
TMP422
TMP423
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SBOS398C –JULY 2007–REVISED MAY 2012
TMP421 PIN CONFIGURATION
DCN PACKAGE
YZD PACKAGE
SOT23-8
DSBGA-8
(TOP VIEW)
(TOP VIEW)
TMP421 PIN ASSIGNMENTS
TMP421
NO. NAME DESCRIPTION
1 DXP Positive connection to remote temperature sensor.
2 DXN Negative connection to remote temperature sensor.
3 A1 Address pin
4 A0 Address pin
5 GND Ground
6 SDA Serial data line for SMBus, open-drain; requires pull-up resistor to V+.
7 SCL Serial clock line for SMBus, open-drain; requires pull-up resistor to V+.
8 V+ Positive supply voltage (2.7V to 5.5V for the TMP421; 2.55V to 5.5V for the TMP421C)
TMP422 PIN CONFIGURATION
DCN PACKAGE
SOT23-8
(TOP VIEW)
TMP422 PIN ASSIGNMENTS
TMP422
NO. NAME DESCRIPTION
1 DX1 Channel 1 remote temperature sensor connection pin. Also sets the TMP422 address; see Table 10.
2 DX2 Channel 1 remote temperature sensor connection pin. Also sets the TMP422 address; see Table 10.
3 DX3 Channel 2 remote temperature sensor connection pin. Also sets the TMP422 address; see Table 10.
4 DX4 Channel 2 remote temperature sensor connection pin. Also sets the TMP422 address; see Table 10.
5 GND Ground
6 SDA Serial data line for SMBus, open-drain; requires pull-up resistor to V+.
7 SCL Serial clock line for SMBus, open-drain; requires pull-up resistor to V+.
8 V+ Positive supply voltage (2.7V to 5.5V)
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Product Folder Link(s): TMP421 TMP422 TMP423