23 Jun
1999
23 Jun
'99
5:43 p.m.
"Richard Erlacher" <edick(a)idcomm.com> wrote:
Aren't those 6520's just weak-kneed versions
of the 6821? I haven't ever
had cause to use a 6520 and I though it was more or less the same in an
identical pinout as the 6821 (maybe the 6521).
Hi Dick
I don't recall if it was the 6820 that was the same as the
6520 or the 6821 that was considered the same as the 6520.
I have parts labled with both 65XX and 68XX numbers some place
in one of my pinball machines ( I remember seeing this ). In
anycase, I would think that in most cases one could also use
6821's as well. Jameco also sells these:
6821 part # 43596 @ 2.49
68B21 part # 43414 @ 2.95
Since the 6520A was a 2 MHz part I would think that:
6520 = 6821
6520A = 68B21
If it were me, I'd just order the 6520A and be happy.
Dwight