> I've had a look at the maxim site however havent been able to
> see any chips along these lines. Perhaps I am looking in the
> wrong area, do you have a part number or know of an app note ?

http://www.maxim-ic.com/appnotes.cfm/appnote_number/1036

Maybe the MAX444x ?

http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2083/ln/

There's also this, found with Google, a unit for twisted-pair
video to 2400m

http://www.elkron.it/en/catalogo/catalogo.asp?liv=4&fam=13&cat=69&prod=359

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