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ADM1813_15: DescriptionMicroprocessor Reset Circuits; File Size249KB，12 Pages; ManufacturerADI; Websitehttps://www.analog.com

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Microprocessor Reset Circuits

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Microprocessor Reset Circuits

Data Sheet

FEATURES

Reliable low cost voltage monitor with reset output

Suitable for monitoring 2.5 V, 3 V, 3.3 V, and 5 V power

supply voltages

Reset threshold levels: 4.62 V, 4.35 V, 3.06 V, 2.88 V, 2.55 V,

2.31 V, and 2.18 V typical

Active high and low push-pull output choices:

ADM1810,

ADM1812, ADM1815,

and

ADM1817

Open-drain with internal pull-up resistor output choices:

ADM1811, ADM1813, ADM1816,

and

ADM1818

Can be used with a manual push-button to generate a reset:

ADM1813, ADM1818

Initialization of microprocessor systems with added safety

Available in 3-lead SOT-23 and SC70 packages

ADM1810

ADM1813/ADM1815

ADM1818

FUNCTIONAL BLOCK DIAGRAMS

ADM1810/ADM1815

RST

TOLERANCE

BIAS

150ms

DELAY

GND

REFERENCE

ADM1811/ADM1816

5.5kΩ

RST

TOLERANCE

BIAS

150ms

DELAY

GND

REFERENCE

APPLICATIONS

Microprocessor systems

Computers

Controllers

Intelligent instruments

Automotive systems

GENERAL DESCRIPTION

The

ADM181x

range of voltage monitoring circuits is used in

any application where an electronic system needs to be reset

when a voltage increases above or below a predetermined value.

Because of the reset delay time incorporated into the

ADM181x

series, these devices provide a safe startup for electronic systems.

Before a system initializes, the power supply must stabilize.

Using the

ADM181x

series ensures that there are typically 150 ms

for the power supply to stabilize before the system resets and

safe system initialization begins.

The

ADM181x

series of microprocessor reset circuits are

available in low cost, space-saving SOT-23 and SC70 packages.

ADM1812/ADM1817

RST

TOLERANCE

BIAS

150ms

DELAY

GND

REFERENCE

ADM1813/ADM1818

RESET

MONITOR

TOLERANCE

BIAS

5.5kΩ

RST

150ms

DELAY

00064-001

GND

REFERENCE

Figure 1.

Rev. F

Information furnished by Analog Devices is believed to be accurate and reliable. However, no

responsibility is assumed by Analog Devices for its use, nor for any infringements of patents or other

rights of third parties that may result from its use. Specifications subject to change without notice. No

license is granted by implication or otherwise under any patent or patent rights of Analog Devices.

Trademarks and registered trademarks are the property of their respective owners.

Document Feedback

One Technology Way, P.O. Box 9106, Norwood, MA 02062-9106, U.S.A.

Technical Support

www.analog.com

ADM1810 to ADM1813/ADM1815 to ADM1818

TABLE OF CONTENTS

Features .............................................................................................. 1

Applications ....................................................................................... 1

General Description ......................................................................... 1

Functional Block Diagrams ............................................................. 1

Revision History ............................................................................... 2

Specifications..................................................................................... 3

Absolute Maximum Ratings............................................................ 4

ESD Caution .................................................................................. 4

Pin Configurations and Function Descriptions ........................... 5

Data Sheet

Typical Performance Characteristics ..............................................6

Theory of Operation .........................................................................7

Timing Diagrams for All Devices ...............................................7

ADM1813 and ADM1818 .............................................................7

ADM1810, ADM1812, ADM1815, and ADM1817 ....................7

ADM1811 and ADM1816 .............................................................7

Outline Dimensions ..........................................................................8

Ordering Guide .............................................................................9

REVISION HISTORY

10/13—Rev. E to Rev. F

Changed Open-Drain to Open-Drain with Internal Pull-Up

Resistor ............................................................................ Throughout

Updated Outline Dimensions ......................................................... 8

Changes to Ordering Guide ............................................................ 9

8/08—Rev. D to Rev. E

Changes to Table 3 ............................................................................ 5

Updated Outline Dimensions ......................................................... 8

Changes to Ordering Guide ............................................................ 9

10/05—Rev. C to Rev. D

Updated Format .................................................................. Universal

Added Figure 3 .................................................................................. 5

Changes to Table 3 ............................................................................ 5

Updated Outline Dimensions ......................................................... 8

Edits to Ordering Guide .................................................................. 9

9/03—Rev. B to Rev. C.

Added SC70 ......................................................................... Universal

Edits to Specifications ...................................................................... 2

Edits to Ordering Guide .................................................................. 4

Updated Outline Dimensions ......................................................... 7

2/03—Rev. A to Rev. B.

Edits to Features.................................................................................1

Deleted Table I ...................................................................................1

Edits to Specifications .......................................................................2

Edits to Absolute Maximum Ratings ..............................................3

Edits to Ordering Guide ...................................................................3

Added Typical Performance Characteristics .................................4

Edits to ADM1813 AND ADM1818 section .................................5

Edits to ADM1810, ADM1812, ADM1815, and

ADM1817 Section .............................................................................5

Edits to ADM1811 and ADM1816 Section ...................................5

Updated Outline Dimensions ..........................................................6

3/02—Rev. 0 to Rev. A.

Addition of Table ..............................................................................1

Edits to Ordering Guide ...................................................................3

Addition of New Text to ADM1813 and ADM1818 Section ......4

4/99—Revision 0: Initial Version

Rev. F | Page 2 of 12

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