What this supervisor does on your board
It monitors thresholds at 2.313V and 2.93V. The reset output is active low, open-drain, so it pulls down to ground when a fault is detected; you tie it to the processor's reset pin with a pull-up resistor to the monitored supply.
Package and mounting — field-fit check
It comes in a SOT-23-6 package, six pins, surface-mount. That is a small outline transistor package — about 3mm x 3mm — so it fits on tight boards and can be hand-soldered with a fine tip if you are careful. No hot-air station required for a swap, but a steady hand and magnification help. The supplier device package is the same SOT-23-6, so no confusion on the reel label.
It is RoHS non-compliant, so if your BOM requires RoHS exemption or you are shipping into a jurisdiction that enforces it, factor that in.