The TPS389006/08 and TPS389R0 combines two comparators with a precision reference voltage and a trimmed resistor divider per monitor (MON) channel. This configuration optimizes device accuracy because all resistor tolerances are accounted for in the accuracy and performance specifications. Both comparators also include built-in hysteresis that provides noise immunity and makes sure stable operation.

Although not required in most cases, for noisy applications good analog design practice is to place a 1nF to 10nF bypass capacitor at the MON input to reduce sensitivity to transient voltages on the monitored signal. Specific deglitch times can also be set independently for each MON via I²C registers

When monitoring VDD supply voltage, the MON pin can be connected directly to VDD. The output (NIRQ) and (NRST) is high impedance when voltage at the MON pin is between upper and lower boundary of threshold.