Hi list!

Does anybody know what kind of chip that is, preferably has a datasheet?

I also need a few of them (unprogrammed of course  if they are OTP).

It has "M1-7643B-5" printed on it and a symbol that looks like an "H".
package type  is ceramic DIL18.

I guess that it is some kind of PAL/GAL or similar, since I assume that
the
datafiles I have to programm them are 512 bytes in size (if they are the
right datafiles).

Pierre



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