2V threshold supervisor for a single supply rail
It provides an active-low, open-drain output with a typical reset timeout of 619ms, giving the downstream system a defined power-up sequence and guaranteed hold time during brown-out conditions.
SOT-23-5 footprint and open-drain output
Housed in a SOT-23-5 package (SC-74A), this supervisor fits a compact board footprint with a standard five-pin layout. The open-drain output lets the reset signal be pulled up to any voltage up to the absolute maximum of the output transistor, which is useful when the supervisor runs from a different rail than the monitored logic. The single-channel monitoring means one TPS3840DL20DBVR covers exactly one supply voltage — multiple rails require multiple devices or a multi-channel supervisor.