Microchip Voltage Supervisor 3-Pin SOT-23B, MCP102T-270E/TT

The Microchip MCP102 is a Voltage Supervisor that keeps a Microcontroller or other device in Reset during a Brownout event via an active-low Reset Pin.

Ultra-Low Supply Current: 1.75 μA (steady-state maximum)
Resets Microcontroller in a Power-Loss Event
RST Pin: Active-low, push-pull
Reset Delay Timer (120 ms delay, typical)

Supervisory & Reset Circuits - Microchip