Have a part on a display / control board from industrial equipment,
> marked
> with:
>
> UCN 4815A
>
> date code in 1984 and manufacturer icon of a stylized capital "A"
> (very fat,
> almost just a triangle). DIP-22 package.
>
> The only other "UCN" part number I can find is a UCN5800 series:
>
>formatting link
>
> Does anybody know what the 4815 is, who the manufacturer is (or was),
> and --
> hope against hope -- a datasheet?
>
> And -- depending on the test results -- possibly a replacement part.
>
> Thanks.
>
You may try your luck here:
Seems to be from a family of devices for VF display driving.
On parent page you will find the book in other formats. These may be easier for text searching.
Cheers!