Datasheet > LP3470M5X-4.38

LP3470M5X-4.38

更新时间： 2024-09-08 22:46:59

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

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数据手册

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LP3470M5X-4.38 数据手册

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 V_CC=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 (V_RTH) 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 V_CCsupply

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 V_CChas risen above the threshold voltage.

n Immune to Short V_CCTransients

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

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

DS100016

www.national.com

12 3 4 5 6 7

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