The SENSEx input can vary from 0 V to 6 V, regardless of the device supply voltage used. The SENSEx pins are used to monitor critical voltage rails or push-button inputs. If the voltage on this pin drops below V_IT-(UV) or goes above V_IT+(OV), then RESETx/RESETx is asserted. When the voltage on the SENSEx pin rises above the positive threshold voltage V_IT-(UV) + V_HYS or goes below the negative threshold voltage V_IT+(OV) - V_HYS,

RESETx/RESETx deasserts after the set RESETx/RESETx delay time. The internal comparators have built-in hysteresis to make sure well-defined RESETx/RESETx assertions and deassertions even when there are small changes on the voltage rail being monitored.

The TPS3704-Q1 combines comparators with a precision reference voltage and a trimmed resistor divider. This configuration optimizes device accuracy because all resistor tolerances are accounted for in the accuracy and performance specifications. The TPS3704-Q1 is relatively immune to short transients on the SENSEx pin. Although not required in most cases, for noisy applications, good analog design practice is to place a 10-nF to 100-nF bypass capacitor at the SENSEx inputs to reduce sensitivity to transient voltages on the monitored signals.