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LTC1535ISWPBF PDF预览

LTC1535ISWPBF

更新时间： 2024-09-24 05:43:39
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
18页 257K
描述
Isolated RS485 Transceiver

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中文翻译

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LTC1535ISWPBF 数据手册

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LTC1535  
Isolated RS485 Transceiver  
FEATURES  
DESCRIPTION  
The LTC®1535 is an isolated RS485 full-duplex differential  
line transceiver. Isolated RS485 is ideal for systems where  
thegroundloopisbrokentoallowformuchlargercommon  
modevoltageranges.Aninternalcapacitiveisolationbarrier  
n
UL Rated Isolated RS485: 2500V  
RMS  
File #E151738  
UL Recognized  
®
n
n
n
n
n
Eliminates Ground Loops  
250kBd Maximum Data Rate  
Self-Powered with 420kHz Converter  
Half- or Full-Duplex  
Fail-Safe Output High for Open or  
Shorted Receiver Inputs  
Short-Circuit Current Limit  
Slow Slew Rate Control  
68kΩ Input Impedance Allows Up to 128 Nodes  
Thermal Shutdown  
provides2500V  
ofisolationbetweenthelinetransceiver  
RMS  
and the logic level interface. The powered side contains a  
420kHz push-pull converter to power the isolated RS485  
transceiver. Internal full-duplex communication occurs  
through the capacitive isolation barrier. The transceiver  
meets RS485 and RS422 requirements.  
n
n
n
n
n
The driver and receiver feature three-state outputs, with  
the driver maintaining high impedance over the entire  
common mode range. The drivers have short-circuit  
currentlimitsinbothdirectionsandaslowslewrateselect  
to minimize EMI or reflections. The 68kΩ receiver input  
allows up to 128 node connections. A fail-safe feature  
defaults to a high output state when the receiver inputs  
are open or shorted.  
8kV ESD Protection On Driver Outputs and  
Receiver Inputs  
Available in 28-Lead SW Package  
n
APPLICATIONS  
n
Isolated RS485 Receiver/Driver  
n
RS485 with Large Common Mode Voltage  
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear  
Technology Corporation. All other trademarks are the property of their respective owners.  
n
Breaking RS485 Ground Loops  
Multiple Unterminated Line Taps  
n
TYPICAL APPLICATION  
**  
CTX02-14659  
1/2 BAT54C  
+
10μF  
2
1/2 BAT54C  
2
2
3
11  
14  
ST1  
ST2  
GND2  
V
CC2  
V
1
V
CC  
CC  
420kHz  
+
10μF  
A
B
1
16  
15  
17  
TWISTED-PAIR  
CABLE  
RO  
28  
27  
R
D
RO  
LOGIC COMMON  
1
FLOATING RS485 COMMON  
RO2  
RE  
2
RE  
** COOPER (888) 414-2645  
Y
Z
DE  
DI  
13  
12  
18  
26  
25  
4
DE  
DI  
GND  
SLO  
1
1535 TA01  
1535fb  
1
1234567...18

中文翻译

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