Texas Instruments LM809M3X-3.08

Description
The LM809/LM810 microprocessor supervisory circuits monitor power supplies in microprocessor and digital systems. They provide a reset to the microprocessor during power-up, power-down, and brown-out conditions. The LM809/LM810 monitor the Voc supply voltage and assert a reset signal when the voltage declines below the factory-programmed reset threshold. The reset signal remains asserted for 240ms after Voc rises above the threshold. The LM809 has an active-low RESET output, while the LM810 has an active-high RESET output.

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)
Guaranteed RESET Output valid for Voc 1V
Low Supply Current, 15μA typ.
Power supply transient immunity
Seven standard reset voltage options

Applications
Microprocessor Systems
Computers
Controllers
Intelligent Instruments
Portable/Battery-Powered Equipment
Automotive