Optocoupler - dual, but "back to back"??

[max_torque]

I'm trying to find a dual optocoupler, ideally in a SO-8 package that has it's channels oriented "back to back" so that in effect i have the signals crossing the isolation barrier in opposite directions.  I'm pretty sure this must exist, but obviously "back2back" isn't the right phrase to search for!  What do you call such a device? 

[Ian.M]

Google: bidirectional dual opto

[wraper]

"Bidirectional"  .
http://uk.farnell.com/avago-technologies/acsl-7210-00re/optocoupler-digital-bi-dir-3750vrms/dp/2368140?ost=ACSL-7210
http://uk.farnell.com/fairchild-semiconductor/fod8012r2/optocoupler-so-8-bi-directional/dp/2083181?ost=fod8012

Two separate optocouplers would be much cheaper though. Especially if you need something low speed.

[max_torque]

"bidirectional" seems to get me expensive devices that can actually send data in both directions across the isolation gap.  What i want is to be able to send data in a single direction per channel, but that each channel should be in opposing directions!  ie instead of having both LED's on one side, and both LDDs/transistors on the other, the device has one LED & one LDD/transistor on each side?

[wraper]

What i want is to be able to send data in a single direction per channel, but that each channel should be in opposing directions!  ie instead of having both LED's on one side, and both LDDs/transistors on the other, the device has one LED & one LDD/transistor on each side?

You are saying obvious. I rather assume you cannot read the datasheets properly  , not we understand you wrong. Devices on the both links I provided do have 2 independent channels, except the power pins of course. Cheapest I can find at farnell http://uk.farnell.com/avago-technologies/acsl-6210-00re/optocoupler-smd-dual-bi-dir/dp/9130144