DESCRIPTION

· The MCP120/130 by Microchip Technology is a voltage supervisory device designed to maintain a microcontroller in reset until the system voltage stabilizes at the correct level. It also safeguards against brown-out conditions by resetting the microcontroller if the supply voltage drops below a safe threshold. Available with seven trip voltage options, both devices feature open drain outputs, with the MCP130 including an internal 5 kΩ pull-up resistor. The RESET pin is active low, ensuring the microcontroller remains in reset when the VDD pin voltage is below the trip-point.

FEATURES

· Holds microcontroller in reset until supply voltage stabilizes.
· Resets microcontroller during power loss.
· Precision monitoring for 3V, 3.3V, and 5V systems.
· Seven selectable voltage trip points.
· Active low RESET pin.
· Open drain output.
· Internal 5 kΩ pull-up resistor (MCP130).
· 350 ms typical RESET hold time.
· RESET to VCC = 1.0V.
· Accuracy: ±125 mV for 5V systems, ±75 mV for 3V systems.
· 45 µA typical operating current.
· Industrial temperature range: -40°C to +85°C.

APPLICATIONS

· Microcontroller reset management.
· Power supply monitoring.
· Brown-out protection in embedded systems.
· Voltage supervision in industrial and consumer electronics.