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Cascade 4040 Ripple counter

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Scarr

Member
Hi All,

Can you take a look at the attached pic and tell me if these two ripple counter are connected correctly to give me a 20bit address, especially the CLK / Q12

Thanks

Steve
 

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JimB

Super Moderator
Most Helpful Member
I think that it should be like this:

4040 counter.png
JimB
 

schmitt trigger

Well-Known Member
One small comment:
Depending what device you are addressing, the ripple characteristics of these types of counters may cause unwanted glitches or states.

If that is the case, you may want to add latches on the outputs.
 

audioguru

Well-Known Member
Most Helpful Member
I agree that the ripple effects will mess up the outputs. You probably want to use synchronous counters where the outputs are always correct.
 
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