Active lifecycle, 1.2V monitored rail
It asserts an active-low reset signal via an open-drain output when the monitored voltage drops below the 1.2V threshold, and releases it after an adjustable/selectable timeout period once the rail recovers.
It comes in a 10-VFDFN exposed-pad package (10-VSON 3x3 mm supplier package).
Adjustable reset timeout — design flexibility
The reset timeout is adjustable or selectable via an external capacitor or pin-strapping, which lets the designer tune the reset hold time to the downstream load's power-up sequence. This avoids false re-sets during supply glitches shorter than the timeout window.