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?
\$\begingroup\$
\$\endgroup\$
1
-
1\$\begingroup\$ Generally you never tie unconnected outputs high/low. Only unconnected inputs. \$\endgroup\$– smciMay 17, 2015 at 1:32
Add a comment
|
3 Answers
\$\begingroup\$
\$\endgroup\$
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.
answered May 16, 2015 at 16:52
\$\begingroup\$
\$\endgroup\$
Leave it disconnected, if you're not using it.
\$\begingroup\$
\$\endgroup\$
Generally you never tie unconnected outputs high/low. Only unconnected inputs.
