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If I am using a J-K flip-flop, but only need one of the outputs, what should I do with the other?

Leave it disconnected, or tie it high/low (via a resistor?) Why?

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    \$\begingroup\$ Generally you never tie unconnected outputs high/low. Only unconnected inputs. \$\endgroup\$
    – smci
    May 17, 2015 at 1:32

3 Answers 3

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If it is an output, simply leave it unconnected.

If you try to connect it to a power rail directly, it will just short out the supply when the flip flop output is driving to the opposite rail. If you connect via a resistor, it will just waste power - there will be a voltage drop across the resistor when the output is opposite from the resistor's bias supply rail.

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Leave it disconnected, if you're not using it.

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Generally you never tie unconnected outputs high/low. Only unconnected inputs.

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