>
> On May 13, 2009, at 4:30 PM, Wouter van Ooijen wrote:
>
>> I am looking for an optocoupler that can handle serial asynch (1MHz is
>> fine) and can operate at 2.5 .. 5.5 V supplies. Must of course be
>> cheap
>> and widely available ;)
>
> the 6N138 and/or 6n137 are widely used in MIDI current-loop to logic
> translators (which is serial async at 31250bps...)  You can probably
> look up other MIDI circuits for other suitable part numbers...
>
> BillW

I've used the 6N137 at 250kbps.

Harold


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