Looking for a ST419

[Dave McGuire]

On Oct 31, 2008, at 2:16 PM, Eric Smith wrote:
> >  What do the signals on the data connector look like?  I seem to  
> recall that there
> > are some differential pairs on there...are they analog or digital?
>
> All electrical signals are analog, but I suppose we shouldn't start  
> that discussion again.

   Well yes, you're preaching to the choir on that one. ;)

> In practical terms, the differential pairs are RS-422, so they are  
> digital, but you need RS-422 drivers and receivers to talk to them  
> properly, and termination on the receivers.  There are many  
> suitable quad driver and quad receiver chips, such as the  
> MC3486/3487 and Am26LS31/32.

   Ahh, that's not so bad.

   Is the whole interface spec available anywhere?

         -Dave

-- 
Dave McGuire
Port Charlotte, FL