MCP120/130

Microcontroller Supervisory Circuit with Open Drain Output

FEATURES

• 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 µA typical operating current

• Temperature range:

- Industrial (I): -40°C to +85°C

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.

Maximum Ratings*

V_DD........................................................................7.0V

All inputs and outputs w.r.t. V_SS .....-0.6V to V_DD +1.0V

Storage temperature ..........................-65°C to +150°C

Ambient temp. with power applied .....-65°C to +125°C

ESD protection on all pins ..................................... ≥ 2 kV

*Notice: Stresses above those listed under “Maximum Ratings” may cause permanent damage to the device. This is a stress rating only and functional operation of the device at those or any other conditions above those indicated in the operational listings of this specification is not implied. Exposure to maximum rating conditions for extended periods may affect device reliability.

PACKAGES BLOCK DIAGRAM

3-Lead Plastic Transistor Outline (TO) (TO-92)

3-Lead Plastic Small Outline Transistor (TT) (SOT23)

8-Lead Plastic Small Outline (SN) – Narrow, 150 mil (SOIC)