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LM3705XCMMX-643 PDF预览

LM3705XCMMX-643

更新时间： 2024-11-07 04:59:51
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美国国家半导体 - NSC 微处理器监控
页数 文件大小 规格书
17页 313K
描述
Microprocessor Supervisory Circuits with Power Fail Input, Low Line Output and Manual Reset

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LM3705XCMMX-643 数据手册

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July 2002  
LM3704/LM3705  
Microprocessor Supervisory Circuits with Power Fail  
Input, Low Line Output and Manual Reset  
n No external components required  
n Manual-Reset input  
The LM3704/LM3705 series of microprocessor supervisory  
n RESET (LM3704) or RESET (LM3705) outputs  
General Description  
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.  
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  
Built-in features include the following:  
n
n
0.5% Reset threshold accuracy at room temperature  
2% Reset threshold accuracy over temperature  
extremes  
Reset: Reset is asserted during power-up, power-down, and  
brownout conditions. RESET is guaranteed down to VCC of  
1.0V.  
n Reset assertion down to 1V VCC (RESET option only)  
n 28 µA VCC supply current  
Manual Reset Input: An input that asserts reset when pulled  
low.  
Power-Fail Input: A 1.225V threshold detector for power fail  
Applications  
warning, or to monitor a power supply other than VCC  
.
n Embedded Controllers and Processors  
n Intelligent Instruments  
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.  
n Automotive Systems  
n Critical µP Power Monitoring  
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.  
Typical Application  
10136903  
© 2002 National Semiconductor Corporation  
DS101369  
www.national.com  
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