The MCP809 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. MCP809 has a CMOS push-pull output with active low reset and is available in a choice of seven different trip voltages. It operates over the extended industrial temperature range (-40°C/+85°C). MCP809 is available in a SOT23-3 package.

  Holds microcontroller in reset until supply voltage reaches stable operating voltage

  Resets microcontroller during power loss

  Precision monitoring of 3V, 3.3V and 5V systems

  Active low RESET pin (MCP809) or active high RESET (MCP810)

  Push-pull output

  Holds RESET for 350ms (typical)

  RESET to VDD = 1.0V

  Accuracy of +(-)125mV for 5V systems and +(-)75mV for 3V systems over temperature

  45uA typical operating current

  Temp range:

  Industrial (I): -40C to +85C