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ADM823SYRJ-R7

更新时间： 2024-11-06 12:35:31
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亚德诺 - ADI 电源电路电源管理电路光电二极管监控
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12页 206K
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Supervisory Circuits with Watchdog and Manual Reset in 5-Lead SC70 and SOT-23

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 浏览型号ADM823SYRJ-R7的Datasheet PDF文件第2页浏览型号ADM823SYRJ-R7的Datasheet PDF文件第3页浏览型号ADM823SYRJ-R7的Datasheet PDF文件第4页浏览型号ADM823SYRJ-R7的Datasheet PDF文件第5页浏览型号ADM823SYRJ-R7的Datasheet PDF文件第6页浏览型号ADM823SYRJ-R7的Datasheet PDF文件第7页 
Supervisory Circuits with Watchdog and  
Manual Reset in 5-Lead SC70 and SOT-23  
ADM823/ADM824/ADM825  
Data Sheet  
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 (minimum) reset timeout  
Watchdog timer with 1.6 sec timeout (ADM823, ADM824)  
Manual reset input (ADM823, ADM825)  
Push-pull output stages  
ADM823  
V
CC  
V
CC  
RESET  
GENERATOR  
RESET  
V
REF  
DEBOUNCE  
MR  
(ADM823)  
, RESET (ADM824/ADM825)  
RESET  
RESET  
WATCHDOG  
DETECTOR  
Low power consumption: 5 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  
GND  
WDI  
Figure 1.  
APPLICATIONS  
Microprocessor systems  
Computers  
Controllers  
Intelligent instruments  
Portable equipment  
GENERAL DESCRIPTION  
The ADM823/ADM824/ADM825 are supervisory circuits that  
monitor power supply voltage levels and code execution integrity  
in microprocessor-based systems. In addition to 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 three parts feature  
different combinations of watchdog input, manual reset input,  
and output stage configuration, as shown in Table 1.  
These parts are 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 (minimum) and 1.6 sec  
(typical), respectively.  
The ADM823/ADM824/ADM825 are available in 5-lead SC70  
and SOT-23 packages and typically consume only 5 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. D  
Document Feedback  
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  
rightsof third parties that may result fromits 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 andregisteredtrademarks 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 ©2004–2013 Analog Devices, Inc. All rights reserved.  
Technical Support  
www.analog.com  
 
 
 
 
 
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ADM823SYRJ-R7 替代型号

型号 品牌 替代类型 描述 数据表
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