LM809 Datasheet (National Semiconductor) - 3-Pin Microprocessor Reset Circuits

LM809, 3-Pin Microprocessor Reset Circuits

The LM809/810 microprocessor supervisory circuits can be used to monitor the power supplies in microprocessor and digital systems.

They provide a reset to the microprocessor during power-up, power-down and brown-out conditions.

The function of the LM809/810 is to monitor the VCC supply voltage, and

LM809 Features

* Precise monitoring of 3V, 3.3V, and 5V supply voltages Superior upgrade to MAX809/810 Fully specified over temperature 140ms min. Power-On Reset pulse width, 240ms typical Active-low RESET Output (LM809) Active-high RESET Output (LM810) n Guaranteed RESET Output valid for VCC≥1V n Low Supply Current