MIDI OPTO? Availability/suitability

[The Dark force of dance]

Y-ellow Y'all.
	It is becoming abundantly clear to me now that a 4N35/CNY17 opto isolator
is _not_ suitable for MIDI. Despite them being suggested as a candidate and
used in one or two MIDI projects. Or not for use with an ATMEL processor's
RXD input at any rate.

My first choice would have been a SHARP PC900. Or a Telefunken (only coz I
like the name) K80P13 (same thing really) I was lucky enough to be able to
purchase a pile of them years ago and am yet to run out. However I couldn't
purchase any these days. (Locally) So my reason for using the 4N35 was that
I thought it would be universally available. Bad choice it would seem! I
get more than enough voltage swing on DC tests but obviously the MIDI
signal isn't getting through to the UART unscathed.

Therefore I have a choice. A 6N137 (the only one I've got it would seem) or
use a PC900. What I want to know is, which would be better in terms of long
term availability and general cheapness and availability in the northern
hemisphere. IE: North America.

The PC900s are desirable because they have a shmitt trigger buffer which
helps clean up the signal. But they may not be easily obtainable. They're
also not pin compatible so they're not exchangeable with the other types. 

Any suggestions would be appreciated because I'm pretty sure the 4N35 is
unredeemable in terms of getting a clean MIDI signal into the UART.

Thanks in advance

Be absolutely Icebox.

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