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ADM8691ARWZ

更新时间： 2024-11-15 20:52:31
品牌 Logo 应用领域
亚德诺 - ADI 光电二极管
页数 文件大小 规格书
24页 384K
描述
Microprocessor Supervisory Circuit

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ADM8691ARWZ 数据手册

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Microprocessor  
Supervisory Circuits  
Data Sheet  
ADM8690/ADM8691/ADM8695  
FEATURES  
FUNCTIONAL BLOCK DIAGRAMS  
Upgrade for the ADM690, ADM691, ADM695 and  
for the MAX690, MAX691, MAX695  
Specified over temperature  
V
BATT  
V
OUT  
Low power consumption: 0.7 mW  
Precision voltage monitor  
V
CC  
RESET  
GENERATOR  
Reset assertion down to 1 V VCC  
1
RESET  
4.65V  
2
Low switch on resistance: 0.7 Ω normal, 7 Ω in backup  
High current drive: 100 mA  
Watchdog timer: 100 ms, 1.6 sec, or adjustable  
Standby current: 400 nA  
Automatic battery backup power switching  
Extremely fast gating of chip enable signals (3 ns)  
Voltage monitor for power fail  
WATCHDOG  
TRANSITION DETECTOR  
(1.6sec)  
WATCHDOG  
INPUT (WDI)  
ADM8690  
POWER-FAIL  
INPUT (PFI)  
POWER-FAIL  
OUTPUT (PFO)  
1.3V  
1
2
VOLTAGE DETECTOR = 4.65V  
RESET PULSE WIDTH = 50ms  
Available in TSSOP package  
Figure 1. ADM8690  
APPLICATIONS  
Microprocessor systems  
Computers  
Controllers  
BATT ON  
ADM8691/  
ADM8695  
V
BATT  
Intelligent instruments  
Automotive systems  
V
OUT  
V
CC  
CE  
PRODUCT HIGHLIGHTS  
IN  
CE  
OUT  
The ADM8690 is available in 8-lead PDIP and SOIC packages  
and provides the following functions:  
LOW LINE  
RESET  
1
4.65V  
1. Power-on reset output during power-up, power-down,  
RESET AND  
WATCHDOG  
TIME BASE  
OSC IN  
RESET  
and brownout conditions. The  
operational with VCC as low as 1 V.  
output remains  
RESET  
GENERATOR  
RESET  
OSC SEL  
2. Battery backup switching for CMOS RAM, CMOS micro-  
processor, or other low power logic.  
WATCHDOG  
INPUT (WDI)  
WATCHDOG  
TRANSITION DETECTOR  
WATCHDOG  
TIMER  
WATCHDOG  
OUTPUT (WDO)  
3. Reset pulse if the optional watchdog timer is not toggled  
within a specified time.  
4. 1.3 V threshold detector for power-fail warning, low battery  
detection, or to monitor a power supply other than 5 V.  
POWER-FAIL  
INPUT (PFI)  
POWER-FAIL  
OUTPUT (PFO)  
1.3V  
1
VOLTAGE DETECTOR = 4.65V  
The ADM8691 and ADM8695 are available in 16-lead PDIP  
and small outline packages (including TSSOP) and provide  
three additional functions:  
Figure 2. ADM8691/ADM8695  
1. Write protection of CMOS RAM or EEPROM.  
2. Adjustable reset and watchdog timeout periods.  
3. Separate watchdog timeout, backup battery switchover, and  
low VCC status outputs.  
Rev. C  
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 registeredtrademarks arethe 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: 781.461.3113 ©2006–2011 Analog Devices, Inc. All rights reserved.  
 
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ADM8691ARWZ 替代型号

型号 品牌 替代类型 描述 数据表
ADM8691ARNZ ADI

完全替代

 Microprocessor Supervisory Circuit
ADM8691ARW-REEL ADI

完全替代

 2-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO16, MS-013AA, SOIC-16
ADM691AARNZ ADI

类似代替

 Microprocessor Supervisory Circuits

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