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MAX6339

更新时间： 2024-09-20 22:58:03
品牌 Logo 应用领域
美信 - MAXIM 微处理器监控
页数 文件大小 规格书
9页 174K
描述
Quad Voltage レP Supervisory Circuit in SOT Package

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19-1756; Rev 2; 10/01  
Quad Voltage µP Supervisory Circuit  
in SOT Package  
General Description  
Features  
The MAX6339 is a precision quad voltage monitor with  
microprocessor (µP) supervisory reset timing. The device  
can monitor up to four system supply voltages without  
any external components and asserts a single reset if any  
supply voltage drops below its preset threshold. The  
device significantly reduces system size and component  
count while improving reliability compared to separate  
ICs or discrete components.  
o Monitors Four Power-Supply Voltages  
o Precision Factory-Set Reset Threshold Options  
for +5.0V, +3.3V, +3.0, +2.5V, +1.8V, and -5.0V  
Supplies  
o User-Adjustable Voltage Monitoring Threshold  
Options  
o Low 55µA Supply Current  
A variety of factory-trimmed threshold voltages are avail-  
able to accommodate different supply voltages and toler-  
ances with minimal external component requirements.  
The selection includes internally fixed options for monitor-  
ing +5.0V, +3.3V, +3.0V, +2.5V, +1.8V, and -5.0V sup-  
plies with -5% and/or -10% tolerances. The device is also  
available with one or two user-adjustable threshold  
options if non-standard thresholds are desired (use exter-  
nal resistor-divider network).  
o Open-Drain RESET Output with 10µA Internal  
Pullup  
o 140ms (min) Reset Timeout Period  
o RESET Valid to IN1 = 1V or IN2 = 1V  
o Immune to Short Monitored Supply Transients  
o No External Components Required  
o Guaranteed from -40°C to +85°C  
o Small 6-Pin SOT23 Package  
The quad monitor provides a single active-low reset out-  
put that is asserted when any monitored input is below its  
associated threshold. The output is open drain with a  
weak internal pull-up (10µA) to IN2. Reset remains low for  
a reset timeout period (140ms min) after all voltages are  
above the selected thresholds. The output is valid as long  
as either the IN1 or IN2 input voltage remains >1V.  
Ordering Information  
The MAX6339 is available in a small 6-pin SOT23 pack-  
age and operates over the extended (-40°C to +85°C)  
temperature range.  
PART  
TEMP. RANGE  
PIN-PACKAGE  
MAX6339_UT-T*  
-40°C TO +85°C  
6 SOT23-6  
________________________Applications  
*Insert the desired letter from the Selector Guide into the blank  
to complete the part number. There is a 2500 piece minimum  
order increment requirement on the SOT package and these  
devices are available in tape-and-reel only.  
Telecommunications  
High-End Printers  
Desktop and Network Computers  
Data Storage Equipment  
Networking Equipment  
Industrial Equipment  
Set-Top Boxes  
Typical Operating Circuit  
MAX6339  
IN1  
SUPPLIES  
IN2  
TO BE  
µP  
RESET  
MONITORED  
IN3  
IN4  
GND  
Pin Configuration appears at end of data sheet.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...9

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