AMATUER LOOKING FOR HELP WITH CHIP

Can anyone please help me to find a datasheet, or at least pinouts for the
Texas Instrument TSP5220CNL voice synthesis chip.

Or where I might find them. I have checked Datasheets.or.uk,
Datasheetarchive.com, Alldatasheet.com, Chipdocs.com, Datasheets4u.com,
Datasheetcatalog.com and Chipcatalog.com without any success. I also tried
the Texas Instrument website.

It was used in vintage arcade machines, the TI/44a computers, the Speak 'n
Spell, etc.

Also does anyone know of any EXTERNAL voice synthesizer boxes that ran on
PCs using the serial port that used the TSP5220 chip?

Any help would be greatly appreciated.

Thanks in advance!