參數(shù)資料
型號(hào): LM3705YABP-643
廠商: National Semiconductor Corporation
英文描述: Microprocessor Supervisory Circuits with Power Fail Input, Low Line Output and Manual Reset
中文描述: 微處理器監(jiān)控電路,帶有電源故障輸入,低壓線路輸出和手動(dòng)復(fù)位
文件頁(yè)數(shù): 1/17頁(yè)
文件大?。?/td> 319K
代理商: LM3705YABP-643
LM3704/LM3705
Microprocessor Supervisory Circuits with Power Fail
Input, Low Line Output and Manual Reset
General Description
The LM3704/LM3705 series of microprocessor supervisory
circuits provide the maximum flexibility for monitoring power
supplies and battery controlled functions in systems without
backup batteries. The LM3704/LM3705 series are available
in MSOP-10 and 9-bump micro SMD packages.
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.
Power-Fail Input: A 1.225V threshold detector for power fail
warning, or to monitor a power supply other than V
CC
.
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.
Features
n
Standard Reset Threshold voltage: 3.08V
n
Custom Reset Threshold voltages: For other voltages
between 2.2V and 5.0V in 10mV increments, contact
National Semiconductor Corp.
n
No external components required
n
Manual-Reset input
n
RESET (LM3704) or RESET (LM3705) outputs
n
Precision supply voltage monitor
n
Factory programmable Reset Timeout Delay
n
Separate Power Fail comparator
n
Available in micro SMD package for minimum footprint
n
±
0.5% Reset threshold accuracy at room temperature
n
±
2% Reset threshold accuracy over temperature
extremes
n
Reset assertion down to 1V V
CC
(RESET option only)
n
28 μA V
CC
supply current
Applications
n
Embedded Controllers and Processors
n
Intelligent Instruments
n
Automotive Systems
n
Critical μP Power Monitoring
Typical Application
10136903
July 2002
L
M
2002 National Semiconductor Corporation
DS101369
www.national.com
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