How should unused terminals of bus switches and analog switches be handled?

Unused pins (I/O pins) of bus switches and analog switches can be left open. The control pin needs pull-up/pull-down.

It is recommended, however, to pull up or down the I/O pins that are exposed to large external noise or other disturbances. In this case, the pull-up and pull-down resistors on the input and output sides of a switch should have the same value to make their voltages equal in order to prevent unnecessary current flow.

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