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MAX8211_08

更新时间： 2024-09-28 11:47:15
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美信 - MAXIM 微处理器监控
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7页 90K
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Microprocessor Voltage Monitors with Programmable Voltage Detection

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MAX8211_08 数据手册

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19-0539; Rev 5; 9/08  
Microprocessor Voltage Monitors  
with Programmable Voltage Detection  
/MAX812  
________________General Description  
____________________________Features  
o µP Power-Fail Warning  
Maxim’s MAX8211 and MAX8212 are CMOS micropower  
voltage detectors that warn microprocessors (µPs) of  
power failures. Each contains a comparator, a 1.5V  
bandgap reference, and an open-drain n-channel output  
driver. Two external resistors are used in conjunction with  
the internal reference to set the trip voltage to the desired  
level. A hysteresis output is also included, allowing the user  
to apply positive feedback for noise-free output switching.  
o Improved 2nd Source for ICL8211/ICL8212  
o Low-Power CMOS Design  
o 5µA Quiescent Current  
o On-Board Hysteresis Output  
o
40mV Threshold Accuracy ( 3.5%)  
o 2.0V to 16.5V Supply-Voltage Range  
o Define Output Current Limit (MAX8211)  
o High Output Current Capability (MAX8212)  
The MAX8211 provides a 7mA current-limited output sink  
whenever the voltage applied to the threshold pin is less  
than the 1.5V internal reference. In the MAX8212, a voltage  
greater than 1.5V at the threshold pin turns the output  
stage on (no current limit).  
_______________Ordering Information  
The CMOS MAX8211/MAX8212 are plug-in replacements  
for the bipolar ICL8211/ICL8212 in applications where the  
maximum supply voltage is less than 16.5V. They offer sev-  
eral performance advantages, including reduced supply  
current, a more tightly controlled bandgap reference, and  
more available current from the hysteresis output.  
PIN-  
PACKAGE  
PART  
TEMP RANGE  
MAX8211CPA  
MAX8211CSA  
MAX8211CUA  
MAX8211CTY  
MAX8211EPA  
MAX8211ESA  
MAX8211EJA  
MAX8211ETY  
MAX8211MJA  
-0°C to +70°C  
-0°C to +70°C  
-0°C to +70°C  
-0°C to +70°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
-55°C to +125°C  
8 Plastic DIP  
8 SO  
8 µMAX  
8 TO-99  
________________________Applications  
8 Plastic DIP  
8 SO  
µP Voltage Monitoring  
8 CERDIP  
8 TO-99  
Undervoltage Detection  
Overvoltage Detection  
Battery-Backup Switching  
Power-Supply Fault Monitoring  
Low-Battery Detection  
8 CERDIP**  
Ordering Information continued on last page.  
*Contact factory for dice specifications.  
**Contact factory for availability and processing to MIL-STD-883.  
_________________Pin Configurations  
___________Typical Operating Circuit  
V+  
TOP VIEW  
R3  
V+  
N.C.  
1
8
7
6
5
V+  
HYST  
µP  
NMI  
OUT  
N.C.  
2
3
HYST  
THRESH  
OUT  
R2  
MAX8211  
MAX8212  
MAX8211  
N.C.  
GND  
THRESH  
GND  
4
R1  
DIP/SO  
LOGIC-SUPPLY UNDERVOLTAGE DETECTOR  
(DETAILED CIRCUIT DIAGRAM—FIGURE 5)  
Pin Configurations continued at end of data sheet.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
1234567

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