LM3702/LM3703 Microprocessor Supervisory Circuits with Low Line Output and Manual Reset
June 2001
LM3702/LM3703
Microprocessor Supervisory Circuits with Low Line
Output and Manual Reset
General Description
The LM3702/LM3703 series of microprocessor supervisory
circuits provide the maximum flexibility for monitoring power
supplies and battery controlled functions in systems without
backup batteries. The LM3702/LM3703 series are available
in a 9-bump micro SMD package.
Built-in features include the following:
Reset: Reset is asserted during power-up, power-down, and
brownout conditions. RESET is guaranteed down to V
CC
of
1.0V.
Manual Reset Input: An input that asserts reset when pulled
low.
Low Line Output: This early power failure warning indicator
goes low when the supply voltage drops to a value which is
2% higher than the reset threshold voltage.
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No external components required
Manual-Reset input
RESET (LM3702) or RESET (LM3703) outputs
Precision supply voltage monitor
Factory programmable Reset Timeout Delay
Available in micro SMD package for minimum footprint
鹵
0.5% Reset threshold accuracy at room temperature
鹵
2% Reset threshold accuracy over temperature
extremes
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Reset assertion down to 1V V
CC
(RESET option only)
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28 碌A(chǔ) V
CC
supply current
Applications
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Embedded Controllers and Processors
Intelligent Instruments
Automotive Systems
Critical 碌P Power Monitoring
Features
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Standard Reset Threshold voltage: 3.08V
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Custom Reset Threshold voltages: For other voltages
between 2.2V and 5.0V in 10mV increments, contact
National Semiconductor Corp.
Typical Application
20011503
漏 2001 National Semiconductor Corporation
DS200115
www.national.com