RS232 <=> RS422

[Tony Duell]

> 
> >> http://www.ortodoxism.ro/datasheets/analogdevices/264748104ad7306.pdf
> >
> >Looks interesting. I wonder if you can get 1-offs anywhere (I've not 
> >looks yet). On the other hand, the 26LS3x's and the MAX232 are easy to 
> >obtain (even though they take up more board area).
> 
> Just looked at DigiKey--you can get them, but I've seen cheaper MPUs!  You

Right... And then there's the shipping across the Pond..... 

> could also sample them from Analog.com if your day job qualifies you.

What day job? I doubt if 'privately repairing old HP calculators' counts :-)
 
> As far as board space, if one were using DIPs, it'd be a hard call.  The AD
> IC is a 24 pin PDIP (also comes in SOIC).  

I'd rather keep buffers that talk to the outside world in 
pin-through-hole DIPs, since they're likely to get zapped at some point, 
and it's a lot easier to replace a (socketed?) DIP than a SOIC. Anyway, 
board area (and component count) are not too important for 1-off 
prototype designs IMHO.

-tony