Info wanted
 

Has anyone got any data/information on the
MSM5525RS chip?
It was manufactured by Oki in the early 1990's
but sadly is obsolete now.
If anyone has a good one gathering dust , please let
me know as I would like to purchase it.
I would also like to know if it is functionally same
(pin for pin) as the MSM5525.
Any information or leads would be greatly appreciated.

Duncan G4DFV