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ADM812MART-REEL7

更新时间： 2024-11-02 12:34:23
品牌 Logo 应用领域
亚德诺 - ADI 电源电路电源管理电路微处理器监控
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12页 178K
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Microprocessor Supervisory Circuit in 4-Lead SOT-143 with DSP

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ADM812MART-REEL7 数据手册

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Microprocessor Supervisory  
Circuit in 4-Lead SOT-143 with DSP  
ADM811/ADM812  
Data Sheet  
FEATURES  
FUNCTIONAL BLOCK DIAGRAM  
Superior upgrade for MAX811/MAX812  
Specified over temperature  
Low power consumption: 5 µA typical  
Precision voltage monitor: 2.5 V, 3 V, 3.3 V, 5 V options  
Reset assertion down to 1 VCC  
ADM811/ADM812  
V
CC  
RESET  
GENERATOR  
RESET/RESET  
GND  
V
REF  
MR  
DEBOUNCE  
Power-on reset: 140 ms minimum  
RESET  
Logic low  
output (ADM811)  
Figure 1.  
Logic high RESET output (ADM812)  
Built-in manual reset  
APPLICATIONS  
Microprocessor systems  
Controllers  
Intelligent instruments  
Automotive systems  
Safety systems  
Portable instruments  
GENERAL DESCRIPTION  
The ADM811/ADM812 are reliable voltage monitoring devices  
suitable for use in most voltage monitoring applications. The  
ADM811/ADM812 are designed to monitor six different  
voltages, each allowing a 5% or 10% degradation of standard  
PSU voltages before a reset occurs. These voltages have been  
selected for the effective monitoring of 2.5 V, 3 V, 3.3 V, and 5 V  
supply voltage levels.  
V
V
CC  
CC  
ADM811  
MICROPROCESSOR  
SYSTEM  
MR  
RESET  
GND  
RESET  
100kΩ  
GND  
Included in this circuit is a debounced manual reset input.  
Reset can be activated using an electrical switch (or an input  
from another digital device) or by a degradation of the supply  
voltage. The manual reset function is very useful, especially if  
the circuit in which the ADM811/ADM812 are operating enters  
into a state that can only be detected by the user. Allowing the  
user to reset a system manually can reduce the damage or  
danger that could otherwise be caused by an out-of-control  
or locked system.  
Figure 2. Typical ADM811 Operating Circuit  
Rev. G  
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  
Technical Support  
©2013 Analog Devices, Inc. All rights reserved.  
www.analog.com  
 
 
 
 
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ADM812MART-REEL7 替代型号

型号 品牌 替代类型 描述 数据表
ADM812MARTZ-REEL7 ADI

完全替代

 Microprocessor Supervisory Circuit in 4-Lead SOT-143 with DSP
STM812MW16F STMICROELECTRONICS

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