What this supervisor does on your board
The Maxim MAX6715UTZGD3-T is a two-channel multi-voltage supervisor that monitors two independent supply rails and asserts a reset signal when either voltage drops below its threshold. The reset outputs are active low, open-drain, so they can be wire-OR'd with other reset sources. It comes in a SOT-23-6 package, which is a common footprint for space-constrained designs like portable equipment, industrial controllers, and networking gear.
The two monitored thresholds are 1.11 V and 2.313 V.
Reset timeout and output type
The open-drain output lets you pull the reset line to any voltage up to the absolute maximum of the supervisor, and you can connect a pull-up resistor to the appropriate rail. Active-low polarity is the standard for most processors and FPGAs.