LP3470IM5X-2.83 National Semiconductor, LP3470IM5X-2.83 Datasheet

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LP3470IM5X-2.83

Manufacturer Part Number
LP3470IM5X-2.83
Description
Microprocessor Reset Circuit IC
Manufacturer
National Semiconductor
Datasheet

Specifications of LP3470IM5X-2.83

Peak Reflow Compatible (260 C)
No
Ic Function
Microprocessor Reset Circuit IC
Reel Quantity
3000
Leaded Process Compatible
No
Mounting Type
Surface Mount
Package / Case
5-SOT-23
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant

Available stocks

Company
Part Number
Manufacturer
Quantity
Price
Part Number:
LP3470IM5X-2.83
Manufacturer:
NS
Quantity:
748
© 2004 National Semiconductor Corporation
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
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
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
The device is available in the tiny SOT23-5 package.
Key Specifications
n
n Standard Reset Threshold Voltages: 2.63V, 2.93V,
Pin Configuration and Basic Operating Circuit
±
3.08V, 3.65V, 4.00V, 4.38V, and 4.63V
1% Reset Threshold Accuracy Over Temperature
RTH
) options: 2.63V, 2.93V, 3.08V, 3.65V, 4.00V,
See NS Package Number
CC
Pin Configuration
has risen above the threshold voltage.
Top View
MF05A
10001602
DS100016
CC
supply
n Custom Reset Threshold Voltages: For other voltages
n Very Low Quiescent Current (16 µA typical)
n Guaranteed Reset valid down to V
Features
n Tiny SOT23-5 Package
n Open Drain Reset Output
n Programmable Reset Timeout Period Using an External
n Immune to Short V
Applications
n Critical µP and µC Power Monitoring
n Intelligent Instruments
n Computers
n Portable/Battery-Powered Equipments
between 2.4V and 5.0V contact your National
Semiconductor representative
Capacitor
Basic Operating Circuit
CC
Transients
CC
=0.5V
September 2000
www.national.com
10001601

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LP3470IM5X-2.83 Summary of contents

Page 1

... Pin Configuration and Basic Operating Circuit Pin Configuration Top View See NS Package Number MF05A © 2004 National Semiconductor Corporation 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) ...

Page 2

... LP3470M5X-3.65 LP3470M5-4.00 LP3470M5X-4.00 LP3470M5-4.38 LP3470M5X-4.38 LP3470M5-4.63 LP3470M5X-4.63 LP3470IM5-2.63 LP3470IM5X-2.63 LP3470IM5-2.93 LP3470IM5X-2.93 LP3470IM5-3.08 LP3470IM5X-3.08 LP3470IM5-3.65 −40˚C to +85˚C LP3470IM5X-3.65 LP3470IM5-4.00 LP3470IM5X-4.00 LP3470IM5-4.38 LP3470IM5X-4.38 LP3470IM5-4.63 LP3470IM5X-4.63 www.national.com Nominal Package V (V) RTH Marking 2.63 D25B 2.63 D25B 2.93 D26B 2.93 D26B 3.08 D28B 3 ...

Page 3

... Note 5: Min. and Max. limits in standard typeface are 100% production tested at 25˚C. Min. and Max. limits in boldface are guaranteed through correlation using Statistical Quality Control (SQC) methods. The limits are used to calculate National’s Average Outgoing Quality Level (AOQL). Note 6: Factory-trimmed reset thresholds are available increments from 2.4V to 5.0V. Contact your National Semiconductor representative. Note 7: V ...

Page 4

Typical Operating Characteristics T = +25˚C, unless otherwise specified Temperature Reset Delay vs Temp CC Normalized V vs Temp. RTH www.national.com 10001610 Normalized t 10001613 10001608 10001611 vs ...

Page 5

Typical Operating Characteristics HYST RTH Pin Description Pin Name 1 SRT Set Reset Time-out Input. Connect a capacitor between this input and ground to select the Reset Time-out period (t leave this pin floating. 2 GND Ground ...

Page 6

Application Information RESET TIMEOUT PERIOD The Reset Timeout Period ( programmable using an RP external capacitor (C ) connected to pin SRT of LP3470 Ceramic chip capacitor rated at or above 10V is sufficient. The Reset ...

Page 7

Typical Application Circuit 7 10001605 www.national.com ...

Page 8

... BANNED SUBSTANCE COMPLIANCE National Semiconductor certifies that the products and packing materials meet the provisions of the Customer Products Stewardship Specification (CSP-9-111C2) and the Banned Substances and Materials of Interest Specification (CSP-9-111S2) and contain no ‘‘Banned Substances’’ as defined in CSP-9-111S2. ...

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