[sdiy] 4N25 SMT?

[harry]

Speed... I think the 4N25 is actually on the slow side for MIDI...
maybe you get away with it....

I'll look around. The most common one I know is tthe 6N138 don't
know about package. We use some  SMT at work I'll check the numbers

H^) harry

Simon Gatrall wrote:

> I'm trying to squeeze all the extra space that I can out of an
> adapter that I'm working on, and I would like to find a SMT version
> of the common optocoupler that is used for MIDI - the 4N25.  I'm much
> more of a mechanical engineer than an electrical engineer so all of
> the specs for these guys don't mean too much to me.  I know that the
> 4N25 is available in a bent lead DIP version that makes it
> pseudo-SMT, but it is still huge.  There are other photo-transistor
> optocouplers that don't use the base of the transistor and are in
> small 4-pin flat packages (e.g. Fairchild makes the HMA121).  Is
> there any reason that these wouldn't work?  What are the important
> specs?
>
> -s!mon