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MAX6343

更新时间： 2024-11-20 23:49:55
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美信 - MAXIM 比较器复位电路
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8页 238K
描述
6-Pin µ.P Reset Circuit with Power-Fail Comparator

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MAX6343 数据手册

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19-1568; Rev 1; 3/00  
6-Pin µP Reset Circuit with  
Power-Fail Comparator  
General Description  
Features  
The MAX6342–MAX6345 family of microprocessor (µP)  
supervisory circuits monitors power supplies in digital sys-  
tems. These devices significantly improve system reliabili-  
ty and accuracy compared to separate ICs or discrete  
components.  
o Small 6-Pin SOT23 Package  
o Precision Factory-Set V Reset Thresholds  
CC  
Between 2.33V and 4.63V  
o Guaranteed RESET Valid to V  
= +1V  
CC  
The MAX6342–MAX6345 provide factory-trimmed V  
CC  
o 100ms min Reset Pulse Width  
reset threshold voltages from 2.33V to 4.63V and operate  
with supply voltages between +1V and +5.5V. A +1.25V  
threshold detector allows for a power-fail warning, for  
low-battery detection, or for monitoring another power  
supply. The MAX6342 contains an MR input and an  
active-low push-pull reset. The MAX6343 and MAX6344  
are identical to the MAX6342 except they provide an  
active-low, open-drain reset and an active-high, push-  
pull reset, respectively. The MAX6345 provides a second  
reset output in place of the MR input to give it an active-  
high push-pull reset and an active-low push-pull reset.  
o Debounced CMOS-Compatible Manual-Reset  
Input  
o Voltage Monitor for Power-Fail or Low-Battery  
Warning  
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  
PIN-PACKAGE  
6 SOT23-6  
6 SOT23-6  
6 SOT23-6  
6 SOT23-6  
MAX6342_UT-T  
MAX6343_UT-T  
MAX6344_UT-T  
MAX6345_UT-T  
All of the devices are packaged in a miniature 6-pin  
SOT23.  
Note: The MAX6342–MAX6345 are available with factory-set  
reset thresholds from 2.33V to 4.63V (see Selector Guides 1, 2).  
Insert the letter corresponding to the desired nominal reset  
threshold into the blank following the part number. There is a  
2500 piece order increment required for the SOT package. SOT  
Top Marks table appears at end of data sheet.  
Applications  
Portable Computers  
Telecom Equipment  
Networking Equipment  
Portable/Battery-Powered Equipment  
Multivoltage Systems  
Pin Configurations  
Embedded Control Systems  
TOP VIEW  
Typical Operating Circuit appears at end of data sheet.  
V
1
2
3
6
5
4
RESET (RESET)  
CC  
Selector Guide 1  
RESET THRESHOLD (V)  
MAX6342  
MAX6343  
MAX6344  
SUFFIX  
GND  
PFI  
MR  
4.63  
4.38  
3.08  
2.93  
2.63  
2.33  
L
M
T
PFO  
S
R
Z
( ) ARE FOR MAX6344 ONLY.  
SOT23-6  
Pin Configurations continued at end of data sheet.  
Selector Guide 2  
PUSH-PULL  
RESET OUTPUT  
OPEN-DRAIN  
RESET OUTPUT  
PUSH-PULL RESET  
OUTPUT  
MANUAL-RESET  
INPUT  
PART  
✔
✔
✔
✔
—
MAX6342  
MAX6343  
MAX6344  
MAX6345  
—
—
—
✔
✔
✔
—
—
✔
—
—
________________________________________________________________ Maxim Integrated Products  
1
For free samples and the latest literature, visit www.maxim-ic.com or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
12345678

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