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AN-214

Part Number	AN-214
Manufacturer	National Semiconductor
Description	Transmission Line Drivers/Receivers
Published	Mar 26, 2013
Detailed Description	Transmission Line Drivers and Receivers for TIA/EIA Standards RS-422 and RS-423 Transmission Line Drivers and Receivers...
Datasheet	AN-214 PDF File

Overview

Transmission Line Drivers and Receivers for TIA/EIA Standards RS-422 and RS-423 Transmission Line Drivers and Receivers for TIA/EIA Standards RS-422 and RS-423 Introduction With the advent of the microprocessor, logic designs have become both sophisticated and modular in concept.
Frequently the modules making up the system are very closely coupled on a single printed circuit board or cardfile.
In a majority of these cases a standard bus transceiver will be adequate.
However because of the distributed intelligence ability of the microprocessor, it is becoming common practice for the peripheral circuits to be physically separated from the host processor with data communications being handled over cables (e.
g.
plant environmental control or security system).
And often these cables are measured in hundreds or thousands of feet as opposed to inches on a backplane.
At this point the component wavelengths of the digital signals may become shorter than the electrical length of the cable and c...

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