When using multiple-input and multiple-channel logic devices inputs must not ever be left floating. In many cases, functions or parts of functions of digital logic devices are unused; for example, when only 24 channels of a 32-channel D-type latch are used. Pins with bus-hold circuitry (xDy) are automatically held in a valid state and can be left unconnected without the input voltage floating. Other inputs, such as the xLE and x OE must be terminated at either ground or V_CC to prevent floating. Generally, the inputs are tied to GND or V_CC, whichever makes more sense for the logic function or is more convenient.

It is not recommended to use pull-up or pull-down resistors with bus-hold inputs.