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HowTo: How to build a High Speed Differential Line Transmitter/Receiver
( Robert Stark)
Step 3 : How it works
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| | The DS9638 line driver is a Schottky, TTL compatible, dual differential line driver designed to meet RS-422 specifications. It is designed to provide unipolar differential drive to twisted pair or parallel wire transmission lines. In plain English:
It takes your input and provides two outputs. One, a buffered version of your input, the second, an inverted version of your input. You connect this directly to your twisted pair wire. CAT-V wire is the best, in my opinion. It's a dead on match for the chip specifications, it's got enough conductors for what we're doing here, and you can get a 1000' roll for $40.
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