I have an older Radio Shack Voice Recording & Sound Lab Kit (Radio Shack Cat No:28-264). It has a UM5583 IC in it and I am looking for some kind of Data Sheet for it. I have looked at a zillion datasheet sites and Radio Shack but no luck yet. Any assistance appreciated.

 

Not a datasheet but it may be of some help

http://books.google.com/books?id=iT...t=result&resnum=10#v=onepage&q=UM5583&f=false