ADM6318DZ25ARJRL7 datasheet, PDF

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ADM6318DZ25ARJRL7: DescriptionSupervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23; File Size242KB，16 Pages; ManufacturerADI; Websitehttps://www.analog.com

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ADM6318DZ25ARJRL7 Overview

Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23

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Supervisory Circuits with Watchdog

and Manual Reset in 5-Lead SOT-23

Data Sheet

FEATURES

26 reset threshold options

2.5 V to 5 V in 100 mV increments

4 reset timeout options

1 ms, 20 ms, 140 ms, and 1120 ms (minimum)

4 watchdog timeout options

6.3 ms, 102 ms, 1600 ms, and 25.6 sec (typical)

Manual reset input

Reset output stages

Push-pull active low

Open-drain active low

Push-pull active high

Low power consumption: 5 µA

Guaranteed reset output valid to V

= 1 V

Power supply glitch immunity

Specified over industrial temperature range

5-lead SOT-23 package

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

FUNCTIONAL BLOCK DIAGRAMS

ADM6316

REF

RESET

GENERATOR

RESET

DEBOUNCE

WATCHDOG

DETECTOR

04533-001

GND

WDI

Figure 1.

ADM6320

REF

APPLICATIONS

Microprocessor systems

Computers

Controllers

Intelligent instruments

Portable equipment

RESET

GENERATOR

RESET

DEBOUNCE

WATCHDOG

DETECTOR

04533-028

GND

WDI

Figure 2.

GENERAL DESCRIPTION

The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/

ADM6321/ADM6322 are supervisory circuits that monitor

power supply voltage levels and code execution integrity in

microprocessor-based systems. As well as providing power-

on reset signals, an on-chip watchdog timer can reset the

microprocessor if it fails to strobe within a preset timeout

period. A reset signal can also be asserted by an external push

button through a manual reset input. The seven parts feature

different combinations of watchdog input, manual reset input,

and output stage configuration, as shown in Table 1.

Table 1. Selection Table

Output Stage

Part No.

ADM6316

ADM6317

ADM6318

ADM6319

ADM6320

ADM6321

ADM6322

Rev. F

Each part is available in a choice of 26 reset threshold options

ranging from 2.5 V to 5 V in 100 mV increments. There are also

four reset timeout options of 1 ms, 20 ms, 140 ms, and 1120 ms

(minimum) and four watchdog timeout options of 6.3 ms, 102 ms,

1600 ms, and 25.6 sec (typical).

The ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/

ADM6321/ADM6322 are available in 5-lead SOT-23 packages

and typically consume only 3 µA, making them suitable for use

in low power portable applications.

Watchdog

Yes

Manual Reset

Yes

Document Feedback

RESET

Push-pull

Open-drain

RESET

Push-pull

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.

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

Technical Support

www.analog.com

ADM6316/ADM6317/ADM6318/ADM6319/ADM6320/ADM6321/ADM6322

TABLE OF CONTENTS

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

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

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

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

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

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

Absolute Maximum Ratings ............................................................ 5

ESD Caution .................................................................................. 5

Pin Configurations and Function Descriptions ........................... 6

Typical Performance Characteristics ............................................. 7

Circuit Description ........................................................................... 9

Reset Output ................................................................................. 9

Data Sheet

Open-Drain RESET Output ........................................................9

Manual Reset Input .......................................................................9

Watchdog Input .............................................................................9

Applications Information .............................................................. 10

Watchdog Input Current ........................................................... 10

Negative-Going V

Transients ................................................ 10

Ensuring Reset Valid to V

= 0 V ........................................... 10

Watchdog Software Considerations ......................................... 10

Options ............................................................................................ 11

Outline Dimensions ....................................................................... 13

Ordering Guide .......................................................................... 13

REVISION HISTORY

5/13—Rev. E to Rev. F

Changes to Table 8 .......................................................................... 12

Changes to Ordering Guide .......................................................... 13

10/10—Rev. D to Rev. E

Changes to Table 8 .......................................................................... 12

Updated Outline Dimensions ....................................................... 13

8/08—Rev. C to Rev. D

Change to Figure 18 ......................................................................... 9

4/07—Rev. B to Rev. C

Added Figure 2.................................................................................. 1

Changes to Figure 23 ...................................................................... 13

Changes to Ordering Guide .......................................................... 13

1/07—Rev. A to Rev. B

Changes to Functional Block Diagram .......................................... 1

Changes to Figure 18 ...................................................................... 10

5/06—Rev. 0 to Rev. A

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

Changes to Functional Block Diagram .......................................... 1

Changes to Table 8 .......................................................................... 12

Changes to Figure 22 ...................................................................... 13

Changes to Ordering Guide .......................................................... 13

10/04—Revision 0: Initial Version

Rev. F | Page 2 of 16

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