DIYbanter - View Single Post

In article ,
says...
On 28 Mar 2006 02:02:51 -0800,
wrote:

Yes, you can. It's the number 7414 which tells the purpose of the chip.
The C-letter means it is cmos-type (and it needs to be in your circuit,
as you mentioned), and H means it is high-speed-type. It is not
mentioned to be necessary in your circuit, but it is ok to use the
high-speed type, although not necessary.

While you are right with the 'general picture' that it is the
function that counts, you may well be wrong here :-)

Use in a C-meter, as the poster mentioned, is likely to be
dependant on the Schmitt trigger's threshold.
And that is one of specs that varies between different
technologies :-)

Also, the C part can run from a higher VCC that the HC part. That might
pose a problem if the VCC is 9V or so.

Jim