• State TI Thinks Resolved
  • Locked Locked
  • Replies 1 reply
  • Answers 1 answer
  • Subscribers 20 subscribers
  • Views 1305 views
  • Users 0 members are here
Support feedback
Options
Options
Related

This thread has been locked.

If you have a related question, please click the "Ask a related question" button in the top right corner. The newly created question will be automatically linked to this question.

CD4027B: Unused pins

Robert Eschbach
Expert 6695 points
Part Number: CD4027B

My customer would like to know the exact proper way to tie unused pins on the TI CD4027 JK Flip-Flop. 

 

That is, he is using only one flip-flop in the package.  Should J, K, S, R, Clock all be pulled low or should R be pulled high and J, K, S, Clock pulled low so that it’s constantly in reset? 

 

Thanks.

  • 0
    TI__Guru* 97046 points
    I would recommend tying all unused inputs directly to ground.

    The states on any unused input can technically be either V_DD or ground, but I would recommend keeping at least CLOCK at ground (and not V_DD) to avoid any possible excess power consumption from the unused channel.