Supervisory Circuits with Watchdog

and Manual Reset in 5-Lead SOT-23

Data Sheet

ADM8316/ADM8318/ADM8319/ADM8320/ADM8321/ADM8322

Rev. 0

Document Feedback

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

responsibilityisassumedbyAnalogDevicesforitsuse,norforanyinfringementsofpatentsorother

rightsofthirdpartiesthatmayresultfromitsuse.Specificationssubjecttochangewithoutnotice.No

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

Trademarksandregisteredtrademarksarethepropertyoftheirrespectiveowners.

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

Tel: 781.329.4700

©2013 Analog Devices, Inc. All rights reserved.

Technical Support

www.analog.com

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, 1.6 sec, and 25.6 sec (typical)

Manual reset input

Multiple reset output options

Low power consumption

Specified over wide temperature range (−40°C to +125°C)

Qualified for automotive applications

5-lead SOT-23 package

APPLICATIONS

Automotive infotainment

Microprocessor systems

Computers

Controllers

Intelligent instruments

Portable equipment

FUNCTIONAL BLOCK DIAGRAMS

Figure 1. ADM8316

Figure 2. ADM8320

GENERAL DESCRIPTION

The ADM8316/ADM8318/ADM8319/ADM8320/ADM8321/

ADM8322 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 switch through a manual

reset input. The six devices feature different combinations of

watchdog input, manual reset input, and output stage

configuration, as shown in Table 6.

Each device 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,

1.6 sec, and 25.6 sec (typical).

The ADM8316/ADM8318/ADM8319/ADM8320/ADM8321/

ADM8322 are available in 5-lead SOT-23 packages and

typically consume only 10 µA, making them suitable for use in

low power, portable applications.

ADM8316

MR

GND

WDI

RESET

RESET

GENERATOR

WATCHDOG

DETECTOR

DEBOUNCE

ADM8320

MR

GND

WDI

RESET

RESET

GENERATOR

WATCHDOG

DETECTOR

DEBOUNCE