MCP120/130
Microcontroller Supervisory Circuit with Open Drain Output
FEATURES PACKAGES Holds microcontroller in reset until supply voltage
reaches stable operating level Resets microcontroller during power loss Precision monitoring of 3V, 3.3V and 5V systems 7 voltage trip points available Active low RESET pin Open drain output Internal pull-up resistor (5 kΩ) for MCP130 Holds RESET for 350 ms (typical) RESET to VCC = 1.0V Accuracy of ±125 mV for 5V systems and ±75 mV
for 3V systems over temperature 45 ВµA typical operating current Temperature range:
-Industrial (I): -40В°C to +85В°C TO-92 WITH
�F’ BONDOUT RST VSS VSS VDD VDD RST MCP120
MCP130 MCP130 TO-92 with
�G’ Bondout VDD DESCRIPTION
The Microchip Technology Inc. MCP120/130 is a voltage supervisory device designed to keep a microcontroller in reset until the system voltage has reached the
proper level and stabilized. It also operates as protection from brown-out conditions when the supply voltage
drops below a safe operating level. Both devices are
available with a choice of seven different trip voltages
and both have open drain outputs. The MCP130 has an
internal 5 kΩ pullup resistor. Both devices have active
low RESET pins. The MCP120/130 will assert the
RESET signal whenever the voltage on the VDD pin is
below the trip-point voltage. TO-92 with
�D’ Bondout TO-92 with
�H’ Bondout VDD VSS
RST
MCP120
MCP130 RST …
