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MAX3444E

更新时间： 2024-11-16 14:57:59
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亚德诺 - ADI /
页数 文件大小 规格书
19页 1212K
描述
±15kV ESD保护、±60V故障保护、10Mbps、失效保护型RS-485/J1708收发器

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中文翻译

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MAX3444E 数据手册

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MAX3440E–MAX3444E  
±15kV ESD-Protected, ±60V Fault-Protected,  
10Mbps, Fail-Safe RS-485/J1708 Transceivers  
General Description  
Features  
The MAX3440E–MAX3444E fault-protected RS-485 and  
J1708 transceivers feature ±60V protection from signal  
faults on communication bus lines. Each device contains  
one differential line driver with three-state output and one  
differential line receiver with three-state input. The 1/4-unit-  
load receiver input impedance allows up to 128 transceiv-  
ers on a single bus. The devices operate from a 5V supply  
at data rates of up to 10Mbps. True fail-safe inputs guar-  
antee a logic-high receiver output when the receiver inputs  
are open, shorted, or connected to an idle data line.  
● ±15kV ESD Protection  
● ±60V Fault Protection  
● Guaranteed 10Mbps Data Rate  
(MAX3441E/MAX3443E)  
● Hot Swappable for Telecom Applications  
● True Fail-Safe Receiver Inputs  
● Enhanced Slew-Rate-Limiting Facilitates  
Error-Free Data Transmission  
(MAX3440E/MAX3442E/MAX3444E)  
Hot-swap circuitry eliminates false transitions on the data  
bus during circuit initialization or connection to a live  
backplane. Short-circuit current-limiting and thermal shut-  
down circuitry protect the driver against excessive power  
dissipation, and on-chip ±15kV ESD protection eliminates  
costly external protection devices.  
● Allow Up to 128 Transceivers on the Bus  
● -7V to +12V Common-Mode Input Range  
● Automotive Temperature Range (-40°C to +125°C)  
● Industry-Standard Pinout  
The MAX3440E–MAX3444E are available in 8-pin SO  
and PDIP packages and are specified over industrial and  
automotive temperature ranges.  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +125°C  
-40°C to +125°C  
PIN-PACKAGE  
8 SO  
MAX3440EESA+  
MAX3440EEPA+  
MAX3440EASA+  
MAX3440EAPA+  
Applications  
● RS-422/RS-485 Communications  
● Industrial Networks  
● Telecommunications Systems  
● HVAC Controls  
8 PDIP  
8 SO  
8 PDIP  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
Ordering Information continued at end of data sheet.  
Selector Guide  
DATA RATE  
(Mbps)  
LOW-POWER  
SHUTDOWN  
RECEIVER/DRIVER TRANSCEIVERS  
PART  
TYPE  
HOT SWAP  
ENABLE  
ON BUS  
MAX3440E  
MAX3441E  
MAX3442E  
MAX3443E  
MAX3444E  
RS-485  
RS-485  
RS-485  
RS-485  
J1708  
0.25  
2.5 to 10  
0.25  
No  
No  
Yes  
128  
Yes  
Yes  
Yes  
128  
Yes  
Yes  
Yes  
Yes  
128  
Yes  
2.5 to 10  
0.25  
Yes  
128  
Yes  
Yes  
128  
Yes (only RE)  
Pin Configurations and Typical Operating Circuits  
TOP VIEW  
DE/RE  
MAX3440E  
MAX3441E  
+
+
FAULT  
RO  
FAULT  
RO  
1
2
3
4
1
2
3
4
V
8
8
7
6
5
V
CC  
D
CC  
DI  
B
B
A
7
R
R
B
A
Rt  
Rt  
6
DE/RE  
DI  
DE/RE  
DI  
A
GND  
RO  
R
GND  
D
D
5
FAULT  
DIP/SO  
DIP/SO  
Pin Configurations and Typical Operating Circuits continued at end of data sheet.  
19-2666; Rev 3; 4/14  
1234567...19

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