LP3470 Tiny Power On Reset Circuit
June 1999
LP3470 Tiny Power On Reset Circuit
General Description
The LP3470 is a micropower
CMOS voltage supervisory circuit designed to monitor power supplies in microprocessor (µP) and other digital systems.
It provides maximum adjustability for power-on-reset (POR) and supervisory functions.
It is available in the following six standard reset threshold
voltage (VRTH) options: 2.
63V, 2.
93V, 3.
08V, 4.
00V, 4.
38V, and 4.
63V.
If other
voltage options between 2.
4V and 5.
0V are desired please contact your National Semiconductor representative.
The LP3470 asserts a reset signal whenever the VCC supply
voltage falls below a reset threshold.
The reset time-out p...