Battery backup supervisor with a 4.4V trip point
The reset output is active-low with a push-pull, totem-pole drive stage, so it can directly drive the reset input of a microcontroller or processor without an external pull-up resistor.
What the 4.4V threshold means for your rail
A 4.4V threshold is set for monitoring a nominal 5V supply rail. The supervisor will trigger a reset when the 5V rail droops roughly 12% below its nominal value, which is a common brown-out detection point for 5V logic systems. The device monitors only one voltage, so if your board has multiple rails (e.g., 3.3V core, 1.8V I/O), each additional rail needs its own supervisor or a multi-voltage monitor part.