CD4040 instead of 74HC4040? - diyAudio
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Old 8th November 2006, 12:45 PM   #1
pho_boi is offline pho_boi  Australia
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Default 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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Old 8th November 2006, 02:58 PM   #2
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Old 8th November 2006, 03:08 PM   #3
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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.
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Old 8th November 2006, 09:32 PM   #4
pho_boi is offline pho_boi  Australia
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oh ok then

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