[sdiy] moog module designs

[Tim Daugard]

Scot and y'all,

> This is clearly contrary to the spec sheet from Philips, and I'll bet
> that's true of all makers, otherwise they couldn't really call it a
4027,
> and in fact, I don't believe they can call a flip-flop like this a
true
> JK.  IMHO, these are broken.  This comment attracted my attention
because
> I like to play with 4xxx series CMOS and 4027 is one of my favorite
toys.
>  Can you give the manufacturer(s) that produced junk 4027s like this ?

I checked my data sheets, I haven't looked at the actual ICs yet. ST
micro is the offender based on the data sheet. Their data sheet does not
have the J high, K high entry in their truth table.

At the time, I was building the module, I was using an ON Semiconductor
data sheet that had the correct truth table. I went back and printed out
the ST data sheet and noticed they had done some strange things with the
truth table.

I still have to verify that the parts in my stock are ST, but, I'm
almost sure they are.

Tim Daugard
AG4GZ 30.4078N 86.6227W Alt: 3.7 M
http://home.sprintmail.com/~daugard/synth.htm