[ortek_service]

I'd recently being looking for an alternative to the AY-3-4592 single +5V rail 128/112 key 16/15 x 8 matrix (needs external De-mux) Capacitive keyboard encoder, used by Acorn System, as it's now very expensive.

And found these (that also require -12V) standard non-capacitive possibilities to design keyboard PCB:

AY-5-2376 / KR2376 88-key 11x8 matrix


AY-5-3600 90-key 10x9 matrix (Were 5off for $13 on an online auction site, but I then discovered I had one already) / KR3600

AY-5-3600PRO PROM / EPROM version, that can be programmed in Factory / Field for custom output codes
(I found Aliexpress seller had the at 99p+delivery)

The number at the end of the part is the ROM-size in bits, and they were in the ROM-Memory section of the GI Databook. And the higher number ones generally support more keys.


Whilst they all tend to give out a standard ASCII code for each key, the matrix arrangement is custom to the particular IC.
So not easy to swap from one IC to another, if keyboard matrix X or Y values are different, and each one requires a particular keyboard layout circuit / PCB