The Microchip MCP100 microcontroller supervisory circuit is designed to keep a microcontroller in reset until the system voltage has reached the proper level and stabilized. It operates on 1V to 5.5V voltage range. It also operates as protection from brown-out conditions when the supply voltage drops below a safe operating level. This supervisor has a CMOS Push-Pull output with Active Low reset and is available in a choice of seven different trip voltages.

Holds microcontroller in reset until supply voltage reaches stable operating level
Resets microcontroller during power loss
Active low RESET pin
Push-pull output
Holds RESET for 350ms (typical)
RESET voltage (Vtrip) range between 4.5V to 4.75V
Accuracy of +(-)125mV for 5V systems and +(-)75mV for 3V systems over temp
45uA typical operating current
Temperature range between -40°C and 85°C
3-lead TO-92 package with 'H' bondout

Supervisory & Reset Circuits - Microchip