CD4040 instead of 74HC4040?

pho_boi · 8th November 2006, 11:45 AM

Hello everyone,

my local electronics shop (Jaycar) doesn't stock any 74HC4040, but they do have the CD4040.

The CD4040 is a 12-stage ripple carry binary counter and the 74HC404 is a 12-stage binary ripple counter?

Are these two pretty much the same?

And can i use the CD4040 instead of the 75HC4040 in a reclocking circuit?

oscillator will be 11.2896mhz then dropped down to 44.1khz and 2.82mhz.

Thanks in advance.

rfbrw · 8th November 2006, 01:58 PM

No.

Ouroboros · 8th November 2006, 02:08 PM

Don't even bother thinking of it!

The CD4040 is of the old 15V CMOS familly. These are MUCH slower than the HC4040 part when run at 5V. There's no chance that a CD4040 would work at these speeds.

pho_boi · 8th November 2006, 08:32 PM

oh ok then

thanks for the replies, I'll try look at other places then.

8th November 2006, 11:45 AM	#1
pho_boi diyAudio Member Join Date: Nov 2004 Location: Brisbane	CD4040 instead of 74HC4040? Hello everyone, my local electronics shop (Jaycar) doesn't stock any 74HC4040, but they do have the CD4040. The CD4040 is a 12-stage ripple carry binary counter and the 74HC404 is a 12-stage binary ripple counter? Are these two pretty much the same? And can i use the CD4040 instead of the 75HC4040 in a reclocking circuit? oscillator will be 11.2896mhz then dropped down to 44.1khz and 2.82mhz. Thanks in advance.

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8th November 2006, 01:58 PM	#2
rfbrw diyAudio Member Join Date: Oct 2001 Location: .	No.

8th November 2006, 02:08 PM	#3
Ouroboros diyAudio Member Join Date: Dec 2003 Location: Nottingham UK	Don't even bother thinking of it! The CD4040 is of the old 15V CMOS familly. These are MUCH slower than the HC4040 part when run at 5V. There's no chance that a CD4040 would work at these speeds.

8th November 2006, 08:32 PM	#4
pho_boi diyAudio Member Join Date: Nov 2004 Location: Brisbane	oh ok then thanks for the replies, I'll try look at other places then.

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