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ADM823MYKS-R7

更新时间: 2024-11-01 22:09:27
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亚德诺 - ADI 监控
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10页 176K
描述
Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SC70 and SOT-23

ADM823MYKS-R7 数据手册

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Supervisory Circuits with Watchdog and  
Manual Reset in 5-Lead SC70 and SOT-23  
Preliminary Technical Data  
ADM823/ADM824/ADM825  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
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:  
ADM823  
V
CC  
V
CC  
RESET  
RESET  
GENERATOR  
V
REF  
DEBOUNCE  
MR  
RESET  
RESET  
(ADM823)  
WATCHDOG  
DETECTOR  
, RESET (ADM824/ADM825)  
Low power consumption (3 µA)  
Guaranteed reset output valid to VCC = 1 V  
Power supply glitch immunity  
GND  
WDI  
Figure 1.  
Specified over automotive temperature range  
5-lead SC70 and SOT-23 packages  
APPLICATIONS  
Microprocessor systems  
Computers  
Controllers  
Intelligent instruments  
Portable equipment  
GENERAL DESCRIPTION  
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 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.  
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  
RESET  
RESET  
Part No.  
ADM823  
ADM824  
ADM825  
Watchdog Timer  
Manual Reset  
Yes  
Yes  
Yes  
Push-Pull  
Push-Pull  
Push-Pull  
Push-Pull  
Push-Pull  
Yes  
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  
Fax: 781.326.8703  
www.analog.com  
© 2004 Analog Devices, Inc. All rights reserved.  

ADM823MYKS-R7 替代型号

型号 品牌 替代类型 描述 数据表
ADM823MYKSZ-R7 ADI

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