looking for false high/Low

Hello all,
My device needs to signal device allow to trigger outputs. from 8 bit register chip 74hc595. After which it output pins trigger a second 74hc595.
atfewards it drives three motors. adice please.

Could you be a little less succinct, please?

looking for false high/low

Can you explain what that means?

My device needs to signal device allow to trigger outputs

Still struggling here with the meaning.

You should read the guidelines for posting and then post all the details we need.
What device?
What signal?
What do you mean by trigger?
Circuit diagram? or some explanation of what you are actually trying to do.