[sdiy] More old chips...BA651/BA652

[Peter Blackett]

Hi,
well they are made by Rohm, but I wasn't able to find a datasheet 
unfortunately.
the number may be similar to some ic's used in some Roland equipment ?
regards Peter

> Hi All,
>
> I can't seem to find anything on these. They must have something to do
> with compansion/expansion as they came from an old DBX noise reduction
> unit and the only other ICs on the boards were 4558s. I am unable to
> find a datasheet on them, however, or even a schematic which would
> show the pinout.
>
> tnx,
> Daryl