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SN65HVD1781

更新时间： 2024-11-21 05:18:11
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德州仪器 - TI /
页数 文件大小 规格书
16页 510K
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70-V Fault-Protected RS-485 Transceiver

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SN65HVD1781 数据手册

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SN65HVD1781  
www.ti.com  
SLLS877A–DECEMBER 2007–REVISED JANUARY 2008  
70-V Fault-Protected RS-485 Transceiver  
1
FEATURES  
APPLICATIONS  
•
•
•
•
•
•
HVAC Networks  
•
Bus-Pin Fault Protection to > ±70 V  
Operation With 3.3-V to 5-V Supply Range  
±16 kV HBM Protection on Bus Pins  
Reduced Unit Load for up to 320 Nodes  
Security Electronics  
Building Automation  
Telecomm Equipment  
Motion Control  
•
•
•
•
Failsafe Receiver for Open-Circuit,  
Short-Circuit and Idle-Bus Conditions  
Industrial Networks  
A
A
A
A
•
Low Power Consumption  
–
–
Low Standby Supply Current, 1 µA Max  
ICC 4 mA Quiescent During Operation  
•
•
Designed for RS-485 and RS-422 Networks  
Pin-Compatible With Industry-Standard  
SN75176  
DESCRIPTION  
This device is designed to survive overvoltage faults such as direct shorts to power supplies, mis-wiring faults,  
connector failures, cable crushes, and tool mis-applications. The internal current-limit circuits allow fault  
survivability without causing the high bus currents that otherwise might damage external components or power  
supplies. It is also robust to ESD events, with high levels of protection to the JEDEC or IEC human-body-model  
specification.  
This device combines a differential driver and a differential receiver, which operate from a single power supply.  
The driver differential outputs and the receiver differential inputs are connected internally to form a bus port  
suitable for half-duplex (two-wire bus) communication. This port features a wide common-mode voltage range,  
making the devices suitable for multipoint applications over long cable runs. This device is characterized from  
–40°C to 125°C. The SN65HVD1781 is pin-compatible with the industry-standard SN75176 transceiver, making it  
a drop-in upgrade for most devices.  
The HVD1781 is fully compliant with ANSI TIA/EIA 485-A with a 5-V supply and can operate with a 3.3-V supply  
with reduced driver output voltage for low-power applications.  
VFAULT up to 70 V  
M0092-02  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
PRODUCTION DATA information is current as of publication date.  
Copyright © 2007–2008, Texas Instruments Incorporated  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
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SN65HVD1781 替代型号

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