Jim, the old one was a repeater, but it didn't address one of the significant issues, that being the amplitude of the serial data stream. I finally realized after doing a little detective work, that was the one issue that kept the previous design from solving some of the problems. So I figured it was time for a "final" cut to address that issue, and then the request for a thru-hole version came along and I went half-way. The one SMT part has pretty wide lead spacing, and shouldn't be a major issue to solder.
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