Electronic Components Datasheet Search
Selected language     English  ▼


ADM823 Datasheet(PDF) 1 Page - Analog Devices

Part No. ADM823
Description  Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SC70 and SOT-23
Download  10 Pages
Scroll/Zoom Zoom In 100% Zoom Out
Maker  AD [Analog Devices]
Homepage  http://www.analog.com
Logo 

 
 1 page
background image
Supervisory Circuits with Watchdog and
Manual Reset in 5-Lead SC70 and SOT-23
Preliminary Technical Data
ADM823/ADM824/ADM825
Rev.PrB
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.
Tel: 781.329.4700
www.analog.com
Fax: 781.326.8703
© 2004 Analog Devices, Inc. All rights reserved.
FEATURES
Precision 2.5 V to 5 V power supply monitor
7 reset threshold options: 2.19 V to 4.63 V
140 ms (min) reset timeout
Watchdog timer with 1.6s timeout (ADM823, ADM824)
Manual reset input (ADM823, ADM825)
Push-pull output stages:
RESET (ADM823)
RESET, RESET (ADM824/ADM825)
Low power consumption (3 µA)
Guaranteed reset output valid to VCC = 1 V
Power supply glitch immunity
Specified over automotive temperature range
5-lead SC70 and SOT-23 packages
APPLICATIONS
Microprocessor systems
Computers
Controllers
Intelligent instruments
Portable equipment
FUNCTIONAL BLOCK DIAGRAM
ADM823
VCC
VCC
MR
GND
WDI
RESET
RESET
GENERATOR
WATCHDOG
DETECTOR
DEBOUNCE
VREF
Figure 1.
GENERAL DESCRIPTION
The ADM823/ADM824/ADM825 are supervisory circuits
which 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 means of an
external push-button, through a manual reset input. The three
parts feature different combinations of watchdog input, manual
reset input and output stage configuration, as shown in Table 1.
Each part is available in a choice of seven reset threshold
options ranging from 2.19 V to 4.63 V. The reset and watchdog
timeout periods are fixed at 140 ms (min) and 1.6s (typ),
respectively.
The ADM823/ADM824/ADM825 are available in 5-lead SC70
and SOT-23 packages and typically consume only 3 µA, making
them suitable for use in low power portable applications.
Table 1. Selection Table
Output Stage
Part No.
Watchdog Timer
Manual Reset
RESET
RESET
ADM823
Yes
Yes
Push-Pull
ADM824
Yes
Push-Pull
Push-Pull
ADM825
Yes
Push-Pull
Push-Pull




Html Pages

1  2  3  4  5  6  7  8  9  10 


Datasheet Download



Related Electronics Part Number

Part NumberComponents DescriptionHtml ViewManufacturer
ADM6316Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SOT-23 1 2 3 4 5 MoreAnalog Devices
ADM6821Low Voltage Supervisory Circuits with Watchdog & Manual Reset in 5-Lead SOT-23 1 2 3 4 5 MoreAnalog Devices
LM3712Microprocessor Supervisory Circuits with Separate Watchdog Timer Output Power Fail Input and Manual Reset 1 2 3 4 5 MoreNational Semiconductor (TI)
MAX6854Nanopower uP Supervisory Circuits with Manual Reset and Watchdog Timer 1 2 3 4 5 MoreMaxim Integrated Products
LM3710Microprocessor Supervisory Circuits with Power Fail Input Low Line Output Manual Reset and Watchdog Timer 1 2 3 4 5 MoreNational Semiconductor (TI)
CAT1021Supervisory Circuits with I2C Serial 2k-bit CMOS EEPROM Manual Reset and Watchdog Timer 1 2 3 4 5 MoreCatalyst Semiconductor
AS1916Microprocessor Supervisory Circuits with Manual Reset and Watchdog 1 2 3 4 5 Moreams AG
MAX6323-MAX6324uP Supervisory Circuits with Windowed Min/Max Watchdog and Manual Reset 1 2 3 4 5 MoreMaxim Integrated Products
LM3709Microprocessor Supervisory Circuits with Low Line Output Manual Reset and Watchdog Timer 1 2 3 4 5 MoreNational Semiconductor (TI)
MAX63165-Pin μP Supervisory Circuits with Watchdog and Manual Reset 1 2 3 4 5 MoreMaxim Integrated Products

Link URL

Does ALLDATASHEET help your business so far?  [ DONATE ]  

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Bookmark   |   Link Exchange   |   Manufacturer List
All Rights Reserved© Alldatasheet.com 2003 - 2017    


Mirror Sites
English : Alldatasheet.com  , Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp  |   Russian : Alldatasheetru.com
Korean : Alldatasheet.co.kr   |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com  |   Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl