opto couplers

[Daniel Schouten]

Hi all,

The last couple of weeks I'm busy making a midi interface with a
PIC16C73, for one of my analog synth projects.
The opto coupler I used in the first place was a CNY17-2 from QTC, which
didn't work properly. After measurements I found out that this one was
just to slow, because the rise and fall times at the transistor side
were too long.
After that I used the same type but from an other manufacturer (HP I
think). This opto worked well.

My question is, which (low cost) opto is mostly used for midi
applications? Maybe the CNY17-2 isn't really suited for this kind of
stuff.

Thanks.

____Daniel____