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LT1785ACN8-TRPBF PDF预览

LT1785ACN8-TRPBF

更新时间: 2024-11-25 05:43:27
品牌 Logo 应用领域
凌特 - Linear /
页数 文件大小 规格书
16页 195K
描述
60V Fault Protected RS485/RS422 Transceivers

LT1785ACN8-TRPBF 数据手册

 浏览型号LT1785ACN8-TRPBF的Datasheet PDF文件第2页浏览型号LT1785ACN8-TRPBF的Datasheet PDF文件第3页浏览型号LT1785ACN8-TRPBF的Datasheet PDF文件第4页浏览型号LT1785ACN8-TRPBF的Datasheet PDF文件第5页浏览型号LT1785ACN8-TRPBF的Datasheet PDF文件第6页浏览型号LT1785ACN8-TRPBF的Datasheet PDF文件第7页 
LT1785/LT1785A/  
LT1791/LT1791A  
60V Fault Protected  
RS485/RS422 Transceivers  
FEATURES  
DESCRIPTION  
TheLT®1785/LT1791arehalf-duplexandfull-duplexdiffer-  
ential bus transceivers for RS485 and RS422 applications  
which feature on-chip protection from overvoltage faults  
on the data transmission lines. Receiver input and driver  
output pins can withstand voltage faults up to ±±60 with  
respect to ground with no damage to the device. Faults  
may occur while the transceiver is active, shut down or  
powered off.  
n
Protected from Overvoltage Line Faults to ±±0ꢀ  
n
Pin Compatible with LTC485 and LTC491  
n
High Input Impedance Supports Up to 128 Nodes  
No Damage or Latchup to ESD  
n
IEC-1666-4-2 Level 4: ±15k0 Air Discharge  
IEC-1666-4-2 Level 2: ±4k0 Contact Discharge  
n
Controlled Slew Rates for EMI Emissions Control  
n
Guaranteed High Receiver Output State for Floating,  
Shorted or Inactive Inputs  
Data rates to 256kbaud on networks of up to 128 nodes  
are supported. Controlled slew rates on the driver out-  
putscontrol EMI emissions and improve data transmis-  
sion integrity on improperly terminated lines. Drivers are  
specified to operate with inexpensive cables as low as  
72Ω characteristic impedance.  
n
Outputs Assume a High Impedance When Off or  
Powered Down  
n
Drives Low Cost, Low Impedance Cables  
n
Short-Circuit Protection on All Outputs  
n
Thermal Shutdown Protection  
Guaranteed Operation to 125°C  
n
The LT1785A/LT1791A devices have “fail-safe” receiver  
inputstoguaranteeareceiveroutputhighforshorted,open  
or inactive data lines. On-chip ESD protection eliminates  
need for external protection devices.  
APPLICATIONS  
n
Industrial Control Data Networks  
n
CAN Bus Applications  
The LT1785/LT1785A are available in 8-lead DIP and SO  
packages and the LT1791/LT1791A in 14-lead DIP and  
SO packages.  
n
H0AC Controls  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
Normal Operation Waveforms at 250kBaud  
0
CC1  
RO1  
RX  
RO  
RE1  
R
TERM  
LT1785  
DE1  
DI1  
TX  
Y-Z  
GND1  
DI  
0
CC2  
RO2  
RX  
RE2  
R
TERM  
LT1785  
178591 TA62  
DE2  
DI2  
TX  
GND2  
178591 TA61  
178491fb  
1

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