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SN65HVD1176_08

更新时间： 2024-11-18 05:18:11
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德州仪器 - TI /
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19页 629K
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PROFIBUS RS-485 TRANSCEIVERS

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SN65HVD1176_08 数据手册

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SN65HVD1176  
SN75HVD1176  
www.ti.com  
SLLS563D–JULY 2003–REVISED DECEMBER 2007  
PROFIBUS RS-485 TRANSCEIVERS  
1
FEATURES  
APPLICATIONS  
•
•
•
Process Automation  
•
Optimized for PROFIBUS Networks  
–
–
–
Chemical Production  
Brewing and Distillation  
Paper Mills  
–
–
Signaling Rates Up to 40 Mbps  
Differential Output Exceeds 2.1 V  
(54 Ω Load)  
Factory Automation  
–
Low Bus Capacitance of 10 pF (Max)  
–
–
–
Automobile Production  
Rolling, Pressing, Stamping Machines  
Networked Sensors  
•
•
•
•
•
Meets the Requirements of TIA/EIA-485-A  
ESD Protection Exceeds ±10 kV HBM  
Failsafe Receiver for Bus Open, Short, Idle  
Up to 160 Transceivers on a Bus  
General RS-485 Networks  
–
–
–
Motor/Motion Control  
HVAC and Building Automation Networks  
Networked Security Stations  
Low Skew During Output Transitions and  
Driver Enabling / Disabling  
•
•
•
•
Common-Mode Rejection Up to 50 MHz  
Short-Circuit Current Limit  
Hot Swap Capable  
Thermal Shutdown Protection  
DESCRIPTION  
These devices are half-duplex differential transceivers, with characteristics optimized for use in PROFIBUS (EN  
50170) applications. The driver output differential voltage exceeds the Profibus requirements of 2.1 V with a 54 Ω  
load. A signaling rate of up to 40 Mbps allows technology growth to high data transfer speeds. The low bus  
capacitance provides low signal distortion.  
The SN65HVD1176 and SN75HVD1176 meet or exceed the requirements of ANSI standard TIA/EIA-485-A  
(RS-485) for differential data transmission across twisted-pair networks. The driver outputs and receiver inputs  
are tied together to form a half-duplex bus port, with one-fifth unit load, allowing up to 160 nodes on a single bus.  
The receiver output stays at logic high when the bus lines are shorted, left open, or when no driver is active. The  
driver outputs are in high impedance when the supply voltage is below 2.5 V to prevent bus disturbance during  
power cycling or during live insertion to the bus. An internal current limit protects the transceiver bus pins in  
short-circuit fault conditions by limiting the output current to a constant value. Thermal shutdown circuitry protects  
the device against damage due to excessive power dissipation caused by faulty loading and drive conditions.  
The SN75HVD1176 is characterized for operation at temperatures from 0°C to 70°C. The SN65HVD1176 is  
characterized for operation at temperatures from -40°C to 85°C.  
LOGIC DIAGRAM (POSITIVE LOGIC)  
D PACKAGE  
(TOP VIEW)  
A
B
D
R
RE  
DE  
D
VCC  
B
1
2
3
4
8
7
6
5
DE  
A
GND  
RE  
R
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.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2003–2007, Texas Instruments Incorporated  
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