http://www.thaddbrooks.com/strippit_IC.png

The attached image is from the DSP I/O board on a Strippit 1000 /XP20 CNC Machines.

The IC appears to be some type of optoisolator, or line buffer. When I scope it out, the Input and output are fairly close to the same, with a little difference in voltage levels.

Any help would be appreciated.

Thadd

 

Have a look at this datasheet:
http://www.nve.com/Downloads/il600a.pdf
and this one:
http://www.nve.com/Downloads/il600.pdf

See if the pinouts/signals match what you're seeing.
Digikey stocks these A versions:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=390-1084-5-ND

and these non-A versions:
http://search.digikey.com/scripts/DkSearch/dksus.dll?Detail&name=390-1082-5-ND

These are just the first parts I'd found on Digikey's site that matched with the *611* and the 8-TSSOP/8-MSOP package.
There are plenty more.
Click on this Digikey search: http://search.digikey.com/scripts/D...earch_go&lang=en&site=us&keywords=611&x=0&y=0
...and then scroll down to Isolators; select one of the 3 links that will appear under that heading.
Narrow your search to 8-pin surface mount type packages, then look through the list to see what all matches the signals you're seeing AND what your parts are connected to.

 

That looks Really close to what I am looking for. It appears that the pin-out is the same. I believe it is close enough to try it. I will order some, and post a reply after I test it.

Thanks for the quick reply.

Thadd

 

With your help, I found the exact part.

HCPL-0611

 

That does look like a prime candidate; the markings on your part seem to match the datasheets' marking specifications as well.

Glad that helped you find something so similar. It's pretty tough to find an exact match for a SMD remotely when I don't have all of the information about the original part.