MOC5007, H11L1 or PC900 are compatible optocouplers with trigger schmitd
open colector inverters. Last one is made by Sharp. Another two I don't
know. They have less than 1mA  photodiode current and go up to 115kbps.
Usual you may sink from tx line up to 10mA from a standard PC ( not
laptop!) If you're not interested to keep compatibility to standard
rx-tx three wire connection, supply may be increased from other lines (
DTR if I remember well...)
And levels, of course using doublers from a local cmos osccilator.
Regards,
Vasile

On Mon, 19 Mar 2001, Dmitry A. Kiryashov wrote:

> What are those?
>
> WBR Dmitry.
>
> Vasile Surducan wrote:
> >
> > You need almost nothing:
> >  two MOC5007or H11L1 to separe tx and rx line.
> >  two voltage doublers if you try a supply from tx line
> > Vasile
>
> --
> http://www.piclist.com hint: The list server can filter out subtopics
> (like ads or off topics) for you. See http://www.piclist.com/#topics
>
>

--
http://www.piclist.com hint: The PICList is archived three different
ways.  See http://www.piclist.com/#archives for details.