SCES307J August 2001 – July 2015 SN74LVC2G06
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When using multiple bit logic devices, inputs must never float. In many cases, functions or parts of functions of digital logic devices are unused. Examples include when only two inputs of a triple input and gate are used or when only three of the four buffer gates are used. Avoid leaving input pins unconnected because the undefined voltages at the outside connections result in undefined operational states. Observe the following rules under all circumstances. Connect all unused inputs of digital logic devices to a high or low bias to prevent them from floating. Based on the function of the device, apply the logic level to any unused input. Based on convenience, tie unused inputs to the GND or the VCC.