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MAX6822

更新时间： 2024-11-24 14:57:27
品牌 Logo 应用领域
亚德诺 - ADI 监控微处理器
页数 文件大小 规格书
9页 1380K
描述
低电压、SOT23封装、微处理器监控电路，带有手动复位及看门狗定时器

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MAX6822 数据手册

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Click here for production status of specific part numbers.  
MAX6821/MAX6825  
Low-Voltage SOT23 µP Supervisors  
with Manual Reset and Watchdog Timer  
General Description  
Features  
The MAX6821–MAX6825 are low-voltage microprocessor  
(µP) supervisory circuits that combine voltage monitoring,  
watchdog timer, and manual reset input functions in  
a 5-pin SOT23 package. Microprocessor supervisory  
circuits significantly improve system reliability and accuracy  
compared to separate ICs or discrete components. These  
devices assert a reset signal whenever the monitored voltage  
drops below its preset threshold, keeping it asserted for  
● Monitors +1.8V, +2.5V, +3.0V, +3.3V, +5.0V Supplies  
● 140ms (min) Reset Timeout Delay  
● 1.6s Watchdog Timeout Period (MAX6821/MAX6822/  
MAX6823/MAX6824)  
● Manual Reset Input (MAX6821/MAX6822/MAX6823/  
MAX6825)  
● Three Reset Output Options  
Push-Pull RESET  
a minimum timeout period after V  
rises above the  
CC  
Push-Pull RESET  
Open-Drain RESET  
threshold. In addition, a watchdog timer monitors against  
code execution errors. A debounced manual reset is also  
available. The MAX6821–MAX6825 monitor voltages from  
+1.8V to +5.0V. These outputs are guaranteed to be in the  
● Guaranteed Reset Valid to V  
= +1.0V  
CC  
● Immune to Short Negative V  
● No External Components  
Transients  
CC  
correct state for V  
down to +1.0V.  
CC  
Nine preprogrammed reset threshold voltages are  
available (see the Threshold Suffix Guide). The  
MAX6821, MAX6822, and MAX6823 all have a manual  
reset input and a watchdog timer. The MAX6821 has  
push-pull RESET, the MAX6822 has open-drain RESET,  
and the MAX6823 has push-pull RESET. The MAX6824  
has a watchdog timer and both push-pull RESET and  
push-pull RESET. The MAX6825 has a manual reset  
input and both push-pull RESET and push-pull RESET.  
The Selector Guide explains the functions offered in  
this series of parts.  
● Small 5-Pin SOT23 Packages  
Ordering Information  
PART*  
TEMP RANGE  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
PIN-PACKAGE  
MAX6821_UK-T  
MAX6822_UK-T  
MAX6823_UK-T  
MAX6824_UK-T  
MAX6825_UK-T  
5 SOT23-5  
5 SOT23-5  
5 SOT23-5  
5 SOT23-5  
5 SOT23-5  
*Insert the desired suffix letter (from the table below) into the  
blank to complete the part number  
Devices are available in both leaded and lead(Pb)-free packag-  
ing.Specify lead-free by replacing “-T” with “+T” when ordering.  
Applications  
● Set-Top Boxes  
● Computers and Con-  
trollers  
● Intelligent Instruments  
● Critical µP Monitoring  
● Portable/Battery-  
Threshold Suffix Guide  
RESET  
THRESHOLD (V)  
● Embedded Controllers  
Powered Equipment  
SUFFIX  
L
M
T
4.63  
4.38  
3.08  
2.93  
2.63  
2.32  
2.19  
1.67  
1.58  
Pin Configurations  
TOP VIEW  
S
R
Z
RESET(RESET)  
1
2
3
5
4
V
CC  
MAX6821  
MAX6822  
MAX6823  
GND  
Y
W
V
MR  
WDI  
Note: Bold indicates standard versions. Samples are typically  
available for standard versions only. All parts require a 2.5k  
minimum order increment. Contact factory for availability.  
SOT23-5  
(RESET) MAX6821 ONLY  
Pin Configurations continued at end of data sheet.  
Typical Operating Circuit appears at end of data sheet.  
Selector Guide appears at end of data sheet.  
19-1868; Rev 4; 10/19  
1234567...9

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