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LP3470IM5X-4.38 Datasheet(PDF) 1 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
Part # LP3470IM5X-4.38
Description  Tiny Power On Reset Circuit
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Manufacturer  NSC [National Semiconductor (TI)]
Direct Link  http://www.national.com
Logo NSC - National Semiconductor (TI)

LP3470IM5X-4.38 Datasheet(HTML) 1 Page - National Semiconductor (TI)

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LP3470
Tiny Power On Reset Circuit
General Description
The LP3470 is a micropower CMOS voltage supervisory
circuit 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
voltage (V
RTH) options: 2.63V, 2.93V, 3.08V, 3.65V, 4.00V,
4.38V, and 4.63V. If other voltage options between 2.4V and
5.0V are desired please contact your National Semiconduc-
tor representative.
The LP3470 asserts a reset signal whenever the V
CC supply
voltage falls below a reset threshold. The reset time-out
period is adjustable using an external capacitor. Reset re-
mains asserted for an interval (programmed by an external
capacitor) after V
CC has risen above the threshold voltage.
The device is available in the tiny SOT23-5 package.
Key Specifications
n ±
1% Reset Threshold Accuracy Over Temperature
n
Standard Reset Threshold Voltages: 2.63V, 2.93V,
3.08V, 3.65V, 4.00V, 4.38V, and 4.63V
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
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
Critical µP and µC Power Monitoring
n
Intelligent Instruments
n
Computers
n
Portable/Battery-Powered Equipments
Pin Configuration and Basic Operating Circuit
Pin Configuration
Basic Operating Circuit
10001602
Top View
See NS Package Number
MF05A
10001601
September 2000
© 2004 National Semiconductor Corporation
DS100016
www.national.com


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