Nanopower push-button controller with programmable delay

TPS3423 and TPS3424 are push-button controllers

which offer wide range of independent detection of short press and long press

functionality. These devices offer up to two outputs per push-button (RESET and

INT), which can be used for various use cases including

enabling the voltage regulator or circuit breakers, generating a monoshot for given

press duration and sending an interrupt to micro controller. The device generates an

interrupt pulse both for short press and long press notifying the micro controller.

RESET output changes the state based on the device configuration.

The extreme low power consumption 18nA

helps to improve product shelf life for battery powered devices. The device keeps

the power tree disabled until required button press is detected. This feature can be

used to implement battery freshness seal.

TPS3423/4 are offered in fixed timing options for

short and long press durations. To provide flexibility to the designer, TPS3424 also

offers user-programmable short and long press durations through an external

capacitor. Kill pin in TPS3424 enables feedback from the microcontroller to

asynchronously de-assert RESET.