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MAX810_EUR+T

更新时间： 2024-11-27 11:14:43
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美信 - MAXIM 微处理器复位电路
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8页 136K
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3-Pin Microprocessor Reset Circuits

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19-0344; Rev 7; 2/10  
3-Pin Microprocessor Reset Circuits  
39J,AX810LMRST/Z  
General Description  
____________________________Features  
♦ Precision Monitoring of +2.5V, +3V, +3.3V, and  
The MAX803/MAX809/MAX810 are microprocessor (µP)  
supervisory circuits used to monitor the power supplies  
in µP and digital systems. They provide excellent circuit  
reliability and low cost by eliminating external compo-  
nents and adjustments when used with +5V, +3.3V,  
+3.0V, or +2.5V powered circuits.  
+5V Power-Supply Voltages  
♦ Fully Specified Over Temperature  
♦ Available in Three Output Configurations  
Open-Drain RESET Output (MAX803)  
Push-Pull RESET Output (MAX809)  
Push-Pull RESET Output (MAX810)  
♦ 140ms min Power-On Reset Pulse Width  
♦ 12µA Supply Current  
♦ Guaranteed Reset Valid to VCC = +1V  
♦ Power Supply Transient Immunity  
♦ No External Components  
These circuits perform a single function: they assert a  
reset signal whenever the V  
supply voltage declines  
CC  
below a preset threshold, keeping it asserted for at  
least 140ms after V has risen above the reset thresh-  
CC  
old. Reset thresholds suitable for operation with a vari-  
ety of supply voltages are available.  
The MAX803 has an open-drain output stage, while the  
MAX809/MAX810 have push-pull outputs. The  
MAX803’s open-drain RESET output requires a pullup  
resistor that can be connected to a voltage higher than  
♦ 3-Pin SC70 and SOT23 Packages  
Ordering Information  
V
CC  
. The MAX803/MAX809 have an active-low RESET  
output, while the MAX810 has an active-high RESET  
output. The reset comparator is designed to ignore fast  
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 +105°C  
-40°C to +105°C  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +105°C  
-40°C to +105°C  
PIN-PACKAGE  
MAX803_EXR-T  
MAX803_EXR+T  
MAX809_EXR-T  
MAX809_EXR+T  
MAX809_EUR-T  
MAX809_EUR+T  
MAX810_EXR-T  
MAX810_EXR+T  
MAX810_EUR-T  
MAX810_EUR+T  
3 SC70  
transients on V , and the outputs are guaranteed to  
CC  
3 SC70  
be in the correct logic state for V  
down to 1V.  
CC  
3 SC70  
Low supply current makes the MAX803/MAX809/  
MAX810 ideal for use in portable equipment. The  
MAX803 is available in a 3-pin SC70 package, and the  
MAX809/MAX810 are available in 3-pin SC70 or SOT23  
packages.  
3 SC70  
3 SOT23  
3 SOT23  
3 SC70  
Applications  
3 SC70  
Computers  
Controllers  
3 SOT23  
3 SOT23  
Intelligent Instruments  
Critical µP and µC Power Monitoring  
Portable/Battery-Powered Equipment  
Automotive  
Note: These parts are offered in 2.5k reels, and must be  
ordered in 2.5k increments. Insert the desired suffix letter from  
the Selector Guide into the blank to complete the part number.  
All versions of these products may not be available at the time  
of announcement. Contact factory for availability.  
Devices are available in both leaded and lead-free packaging.  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
Typical Operating Circuit  
Pin Configuration  
TOP VIEW  
V
CC  
V
1
2
GND  
V
CC  
CC  
R
*
PULLUP  
MAX803  
MAX809  
μP  
MAX803  
MAX809  
MAX810  
V
CC  
3
RESET  
INPUT  
RESET  
RESET (RESET)  
GND  
GND  
SC70-3/SOT23-3  
( ) ARE FOR MAX810.  
MAX803 AVAILABLE IN SC70-3 ONLY.  
*MAX803 ONLY  
________________________________________________________________ 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.  
12345678

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