It uses an active-low, push-pull output, so it pulls the reset line low during a fault and drives it high when the rail is valid — no external pull-up resistor needed.
The voltage threshold is 4.63 V, which means this part is designed to monitor a 5 V supply rail. It will assert reset when the rail drops to about 4.63 V or below, and de-assert (release) once the rail recovers above that level plus a small hysteresis.
Package and rework — SOT-23-5
Housed in a SOT-23-5 package (SC-74A, SOT-753), surface-mount only. Five pins, fine-pitch enough that a steady hand and a hot-air station will lift it clean without lifting the pads. The small thermal mass means it reflows quickly; just don't cook it past 260°C peak for more than 10 seconds.
ROHS3 compliant.
