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LP3470M5-3.08 Datasheet

  • LP3470M5-3.08

  • Tiny Power On Reset Circuit

  • 161.24KB

  • 7頁

  • NSC

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LP3470 Tiny Power On Reset Circuit
June 1999
LP3470
Tiny Power On Reset Circuit
General Description
The LP3470 is a micropower CMOS voltage supervisory cir-
cuit designed to monitor power supplies in microprocessor
(碌P) 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.
The LP3470 asserts a reset signal whenever the V
CC
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 V
CC
has risen above the threshold voltage.
The device is available in the tiny SOT23-5 package.
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 碌A(chǔ) typical)
n
Guaranteed Reset valid down to V
CC
=0.5V
Features
n
Tiny SOT23-5 Package
n
Open Drain Reset Output
n
Programmable Reset Timeout Period Using an External
Capacitor
n
Immune to Short V
CC
Transients
Applications
n
n
n
n
Critical 碌P and 碌C Power Monitoring
Intelligent Instruments
Computers
Portable/Battery-Powered Equipments
Key Specifications
n
鹵
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
漏 1999 National Semiconductor Corporation
DS100016
www.national.com

LP3470M5-3.08 產(chǎn)品屬性

  • National Semiconductor (TI)

  • 1

  • 0.5 V to 5.5 V

  • 3.0492 V

  • 3.1108 V

  • Not Resettable

  • No Watchdog

  • 5.5 V

  • 0.5 V

  • 16 uA

  • 300 mW

  • + 85 C

  • SOT-23-5

  • Reel

  • - 20 C

  • 1000

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