This is a modern replacement for the PLA chip in your Commodore C16, C116 or Plus/4.
I assembled this by following this open source project: https://www.freepascal.org/~daniel/c16pla/
Note: This also works in the Plus 4, however the PCB is too large and while it fits into the socket, the PCB sticks up too high and the keyboard/case will not close. So in Plus 4 you need replace legs with shorter legs or soldering directly motherboard.