Push-button input (PB) for TPS3423 and TPS3424 is available in active low and active high configuration as per Table 7-1 as shown in Figure 7-1 and Figure 7-2.

PB pin should be connected to a switch with ON resistance less than 20% of the pull-up / pull-down resistance to provide the correct PB input trigger for the device.

A precise timer gets started once PB pin is triggered. The device generates the output corresponding to short press, once PB pin is kept low (for active low PB) or kept high (for active high PB) for more than short press (t_SP) duration. The device generates output corresponding to long press if the PB pin is held in the same state for long press (t_LP) duration. The timer stops and gets reset when PB pin is released. If PB is released during interrupt pulse (Figure 7-3), non-latched RESET pulse or KILL debounce time then next PB input is ignored as described in Section 6.7.

TPS3423 has two independent push-button pins PB1 and PB2. These pins are factory programmed for short press (t_SP) and long press (t_LP) duration. TPS3424 has single PB pin. PB pin in TPS3424 is available both in fixed timing and user programmable option (8-pin DRL package) through capacitor connection on SPT and LPT pins. SPT and LPT pins must be floating for fixed timing option of TPS3424.