Part Number
|
LM809 |
Manufacturer
|
National Semiconductor |
Description
|
3-Pin Microprocessor Reset Circuits |
Published
|
Mar 22, 2005 |
Detailed Description
|
LM809/LM810 3-Pin Microprocessor Reset Circuits
September 1999
LM809/LM810 3-Pin Microprocessor Reset Circuits
General...
|
Datasheet
|
LM809
|
Overview
LM809/LM810 3-Pin Microprocessor Reset Circuits
September 1999
LM809/LM810 3-Pin Microprocessor Reset Circuits
General Description
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 assert a reset signal whenever this voltage declines below the factory-programmed reset threshold.
The reset signal remains asserted for 240ms after VCC rises above the threshold.
The LM809 has an active-low RESET output, while the LM810 has an active-high RESET outp...
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