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Original question:

CD4043B: Output logic when start-up

CD4043B: defined power on state.

Davide LP
Prodigy 540 points

Part Number: CD4043B

Hello Team,

is there any suggested way (e.g. external circuitry) so that the output state after powerup can be defined?

From the other related post, I understand that no fixed state can be assured with this IC alone.

Regards,
Davide

  • 0
    TI__Genius 15781 points

    Hi Davide,

    With if the enable pin is held low, the outputs will be in high impedance mode. You could keep the outputs disabled until a valid state is registered to the latches. If a pull down is tied to the outputs, the line will be held low until they are re-enabled.