Cascade 4040 Ripple counter

S

Scarr

Member

• Oct 26, 2017

• #1

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

• Oct 26, 2017

• #2

I think that it should be like this:


JimB

 

ronsimpson

Well-Known Member

Most Helpful Member

• Oct 26, 2017

• #3

A11, .......... good catch

 

S

schmitt trigger

Well-Known Member

Most Helpful Member

• Oct 26, 2017

• #4

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

• Oct 26, 2017

• #5

I agree that the ripple effects will mess up the outputs. You probably want to use synchronous counters where the outputs are always correct.