LM8365 Micropower Undervoltage Sensing Circuits with Programmable Output Delay
March 2003
LM8365
Micropower Undervoltage Sensing Circuits with
Programmable Output Delay
General Description
The LM8365 series are micropower undervoltage sensing
circuits that are ideal for use in battery powered micropro-
cessor based systems, where extended battery life is a key
requirement.
A range of threshold voltages from 2.0V to 4.5V are available
with an active low, open drain or CMOS, output. These
devices feature a very low quiescent current of 0.65碌A(chǔ) typi-
cal. The LM8365 series features a highly accurate voltage
reference, a comparator with precise thresholds and built-in
hysterisis to prevent erratic reset operation, a time delayed
output which can be programmed by the system designer,
and guaranteed Reset operation down to 1.0V with ex-
tremely low standby current.
These devices are available in the space saving 5-Pin
SOT23 surface mount package. For additional undervoltage
thresholds and output options, please contact National
Semiconductor.
Features
n
Extremely Low Quiescent Current: 0.65碌A(chǔ), at V
IN
=
2.87V
n
High Accuracy Threshold Voltage (
鹵
2.5%)
n
Complementary or Open Drain Output
n
Programmable output delay by external Capacitor
(100ms typ with 0.1碌F)
n
Input Voltage Range: 1V to 6V
n
Surface Mount Package (5-Pin SOT23)
n
Pin for pin compatible with MC33465
Applications
n
n
n
n
Low Battery Detection
Microprocessor Reset Controller
Power Fail Indicator
Battery Backup Detection
Functional Diagrams
CMOS Output
Open Drain Output
20066013
20066014
Connection Diagram
5-Pin SOT23
20066012
Top View
漏 2003 National Semiconductor Corporation
DS200660
www.national.com