I've played only with isolated 232 and other isolation devices in medical
equipment.
However for clk I think will work any photodiode-phototransistor
optocoupler like CNY17 or 4N series, depends on max frequency
requirements.
For data, I'll use two high frequency trigger schmitd inverter like MOC
5007 or H11L series, both have a two input nand gate which could be use
for enabling the sense of transmision ( receiving or transmiting ) and run
well up to 100kHz.
Vasile



On Fri, 17 Aug 2001, Alan B. Pearce wrote:

> I have a requirement to have an I2C link across an isolation boundary. The
> voltage requirements of the boundary are not high, it is just that I am
> needing to emulate some circuitry for testing purposes from the rest of the
> test equipment.
>
> I will not need to be running the I2C link at high speed, so I was thinking
> in terms of opto-isolators to achieve this. Anyone have any experience in
> this area, especially the bi-directional part?
>
> --
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>
>

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