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LP3470IM5-4.63 PDF预览

LP3470IM5-4.63

更新时间: 2024-11-22 22:15:03
品牌 Logo 应用领域
美国国家半导体 - NSC 复位电路
页数 文件大小 规格书
7页 161K
描述
Tiny Power On Reset Circuit

LP3470IM5-4.63 数据手册

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June 1999  
LP3470  
Tiny Power On Reset Circuit  
n Custom Reset Threshold Voltages: For other voltages  
between 2.4V and 5.0V contact your National  
Semiconductor representative  
n Very Low Quiescent Current (16 µA typical)  
n Guaranteed Reset valid down to VCC=0.5V  
General Description  
The LP3470 is a micropower CMOS voltage supervisory cir-  
cuit designed to monitor power supplies in microprocessor  
(µP) and other digital systems. It provides maximum adjust-  
ability for power-on-reset (POR) and supervisory functions. It  
is available in the following six standard reset threshold volt-  
age (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 repre-  
sentative.  
Features  
n Tiny SOT23-5 Package  
n Open Drain Reset Output  
n Programmable Reset Timeout Period Using an External  
Capacitor  
The LP3470 asserts a reset signal whenever the VCC supply  
voltage falls below a reset threshold. The reset time-out pe-  
riod is adjustable using an external capacitor. Reset remains  
asserted for an interval (programmed by an external capaci-  
tor) after VCC has risen above the threshold voltage.  
n Immune to Short VCC Transients  
Applications  
n Critical µP and µC Power Monitoring  
n Intelligent Instruments  
The device is available in the tiny SOT23-5 package.  
n Computers  
n Portable/Battery-Powered Equipments  
Key Specifications  
±
n
1% Reset Threshold Accuracy Over Temperature  
n Standard Reset Threshold Voltages: 2.63V, 2.93V,  
3.08V, 4.00V, 4.38V, and 4.63V  
Pin Configuration and Basic Operating Circuit  
Pin Configuration  
Basic Operating Circuit  
DS100016-2  
Top View  
See NS Package Number  
MA05B  
DS100016-1  
© 1999 National Semiconductor Corporation  
DS100016  
www.national.com  

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