28 Mar
2005
28 Mar
'05
9:27 p.m.
Dwight wrote:
I just saw someone auctioning a motorola
MC4004. I suspect that some will think it is
an Intel 4004 but I guess they'll soon
find out that it is just a simple cmos part.
Even if they did expect a simple CMOS part, they'll still be
disappointed, because the MC4004 is a TTL part!
Motorola had a 4000 series of TTL parts before the SN7400 series
became established. So when they introduced their equivalent
of the RCA CD4000 series CMOS, they called it the MC14000 series.
I can't find any reference to a CD4004 at the moment, but if there
was one, and Motorola made an equivalent, they would have called it
an MC14004.
I've seen this problem occur more often when someone wants a CD4024
and gets an MC4024, or vice versa. The former is seven stage binary
counter, but the latter is a dual VCO.
Eric