9.1 Application Information

The TMP43x devices require only a transistor connected between the DXP and DXN pins for remote temperature measurement. Tie the DXP pin to GND if the remote channel is not used and only the local temperature is measured. The SDA, ALERT, and THERM pins (and SCL, if driven by an open-drain output) require pullup resistors as part of the communication bus. TI recommends a 0.1-µF power-supply decoupling capacitor for local bypassing. Figure 21 shows a typical configuration of the TMP431; see Figure 22 for a typical configuration of the TMP432.