Some +15V CMOS ICs are labelled HCF 40xx. ST micro seem to do this a
lot - I have HCF4052, 4013, 4001 etc. - all +15V parts. The F is the
important bit to watch for.
Most +5V parts I have come across have a "74" prefix eg. 74HC123. 74HCT
is another class of +5V parts - CMOS, but TTL compatible.
cheers,
Dave
lot - I have HCF4052, 4013, 4001 etc. - all +15V parts. The F is the
important bit to watch for.
Most +5V parts I have come across have a "74" prefix eg. 74HC123. 74HCT
is another class of +5V parts - CMOS, but TTL compatible.
cheers,
Dave
On Apr 3, 2009, at 15:36, w1xyzq wrote:
> I'm just getting back to building my synth. I was looking through my
> parts to see what I need to order, and most of my logic chips are
> labeled HC4015, etc. I was kicking myslef, because I want the CD part.
> BUT.. then I was looking at my modules, and most are built w/ the HC
> part. So, I look up the datasheet for the IC, which is a STMicro, and
> it does say 5, 10, 15 volts. (and my modules work)
>
> so, do these just have a different naming convention, or am I missing
> something?
>
>