The TLV4062-Q1 and TLV4082-Q1 each have two comparators for voltage detection. Each comparator has one external input; the other input is connected to the internal reference. The comparator rising threshold is designed and trimmed to be equal to V_IT+, and the falling threshold is trimmed to be equal to V_IT–. The difference between V_IT+ and V_IT- is referred to as the comparator hysteresis and is 60 mV. The integrated hysteresis makes the TLV40x2 less sensitive to supply-rail nose and provides stable operation in noisy environments without having to add external positive feedback to create hysteresis.

The comparator inputs can swing from ground to 5.5 V, regardless of the device supply voltage used. This includes the instance when no supply voltage is applied to the comparator (V+ = 0 V). As a result, the TLV40x2 is referred to as fault tolerant, meaning it mainitains the same high input impedance when V+ is unpowered or ramping up. Although not required in most cases, for extremely noisy applications, good analog design practice is to place a 1-nF to 10-nF bypass capacitor at the comparator input in order to reduce sensitivity to transients and layout parasitic.

For each INx input, the corresponding output (OUTx) is driven to logic low when the input voltage drops below V_IT–. When the voltage exceeds V_IT+, the output (OUTx) is driven high; see Figure 6-1.