PST851A

This is a reset IC with an independent voltage detection monitor terminal VS and VDD terminal.
The IC power supply is separate. So, even if the monitor voltage VS is low, the output does not become unstable at the operation limit like conventional reset ICs. Instead it maintains low-level operation.
This IC is particularly suitable for low-voltage (1V type) power monitoring. It has an accuracy of ±1.5% and an ultralow current consumption of 0.35 μA type and otherwise offers characteristics equivalent to those of conventional reset ICs.

The MinebeaMitsumi reset circuits are made in Japan and are of the highest quality. They will be perfectly suited for your applications.