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MAX6826VUT

更新时间： 2024-11-30 13:00:23
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美信 - MAXIM 监控
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19-1867; Rev 1; 1/02  
Dual Ultra-Low-Voltage SOT23 µP Supervisors  
with Manual Reset and Watchdog Timer  
General Description  
Features  
The MAX6826–MAX6831 are ultra-low-voltage micro-  
processor (µP) supervisory circuits designed to monitor  
two power supplies and have manual reset and watch-  
dog input functions. These devices assert a system reset  
if any of the monitored supplies fall below the prepro-  
grammed thresholds, and maintain reset for a minimum  
timeout period after the supplies rise above the threshold.  
Microprocessor supervisors significantly improve system  
reliability and accuracy compared to separate ICs or dis-  
crete components. These devices monitor primary volt-  
ages from +1.8V to +5.0V and secondary voltages from  
+0.9V to +2.5V. These devices are guaranteed to be in  
o Monitor Primary V  
Supplies from +1.8V  
CC  
to +5.0V and Secondary V  
from +0.9V to +2.5V  
o User Adjustable RESET IN Down to +0.63V  
(MAX6826/MAX6827/MAX6828)  
Supplies  
CC2  
o 140ms (min) Reset Timeout Delay  
o 1.6s Watchdog Timeout Period  
o Manual Reset Input  
o Three Reset Output Options  
Push-Pull RESET  
Push-Pull RESET  
Open-Drain RESET  
the correct state for V down to +1.0V.  
CC  
A variety of preprogrammed reset threshold voltages  
are available (see Threshold Suffix Guide). The devices  
include manual reset and watchdog inputs. The  
MAX6829/MAX6830/MAX6831 provide a factory-  
trimmed threshold to monitor a 2nd voltage down to  
+0.9V. The MAX6826/MAX6829 have a push-pull  
RESET, the MAX6827/MAX6830 have a push-pull  
RESET and the MAX6828/MAX6831 have an open-drain  
RESET. The MAX6826/MAX6827/MAX6828 have an aux-  
iliary monitor that allows user adjustable input to monitor  
voltages down to +0.6V. See Selector Guide for func-  
tions available.  
o Guaranteed Reset Valid Down to V  
= +1.0V  
CC  
o Immune to Short Negative V  
Transients  
CC  
o No External Components  
o Small 6-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  
-40°C to +125°C  
PIN-PACKAGE  
6 SOT23-6  
6 SOT23-6  
6 SOT23-6  
6 SOT23-6  
6 SOT23-6  
6 SOT23-6  
MAX6826_UT-T  
MAX6827_UT-T  
MAX6828_UT-T  
MAX6829_ _UT-T  
MAX6830_ _UT-T  
MAX6831_ _UT-T  
________________________Applications  
Portable/Battery-  
Powered Equipment  
Automotive Systems  
Critical µP Monitoring  
Multivoltage Systems  
Embedded Controllers  
Intelligent Instruments  
†
Insert the desired suffix letter (from Standard Versions table) into  
the blanks to complete the part number.  
Pin Configuration  
Standard Versions Table*  
TOP VIEW  
MAX6826/MAX6827/MAX6828  
RESET(RESET)  
1
2
3
6
5
4
V
CC  
L
S
R
Z
V
MAX6826–  
MAX6831  
GND  
MR  
RESET IN/V  
WDI  
CC2  
*Samples are typically available for standard versions only.  
The MAX6826/MAX6827/MAX6828 require a 2.5k minimum  
order increment for all versions. Contact factory for availability.  
SOT23-6  
(RESET) MAX6827/MAX6830 ONLY  
RESET IN FOR MAX6826/MAX6827/MAX6828 ONLY  
V
FOR MAX6829/MAX6830/MAX6831 ONLY  
CC2  
Typical Operating Circuit appears at end of data sheet.  
Threshold Suffix Guide appears at end of data sheet.  
Standard Versions Table continued at end of data sheet.  
Selector Guide 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...12

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