The TLV841M and TLV841C device variant options monitor the voltage via the VDD pin. The EVM provides jumper J2 and test point TP1 for connecting the power supply input to the VDD pin. If the voltage on this pin drops below V_IT-, RESET is asserted low. The VDD pin is connected internally to a comparator through an internal resistor divider at the positive input and the negative input is connected to an internal reference. The internal resistor divider is set to provide the input voltage threshold to cause a reset, V_IT-, that corresponds to the chosen voltage option variant. Please see the Device Comparison Table in the TLV841 datasheet for more information on the different voltage device variants.