[sdiy] Issue with CD4024 Ripple Counter

David G Dixon dixon at mail.ubc.ca
Sun Sep 19 22:53:14 CEST 2021


Hi Tim,

The BEs are made by Texas Instruments.

The BCNs are made by National.

Incidentally, I just added an additional 100nF decoupling cap between VDD
and GND close to the 4024 -- no effect.



-----Original Message-----
From: Synth-diy [mailto:synth-diy-bounces at synth-diy.org] On Behalf Of Tim
Stinchcombe
Sent: Sunday, September 19, 2021 1:45 PM
To: synth-diy at synth-diy.org
Subject: Re: [sdiy] Issue with CD4024 Ripple Counter

[CAUTION: Non-UBC Email]

David,

> CD4024BCN works perfectly (2 chips tested)
> 
> CD4024BE does not work (3 chips tested) -- it seems to want to clock 
> on
both
> edges, erratically.

So that we are completely clear, are these *all* made by TI, or are they
made by a mix of manufacturers, particularly the 'BCN' <-> 'BE' split?!

I have a single TI CD4024BE here, which I am tempted to stick on some
breadboard to see what _it_ does, particularly with reference to rise/fall
times.

Tim
__________________________________________________________
Tim Stinchcombe 

Cheltenham, Glos, UK
email: tim102 at timstinchcombe.co.uk
www.timstinchcombe.co.uk




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