Buffers and Drivers

4049: Inverting buffer:

• Used as an (inverting) buffer to restore logic levels.
• If the input on the inverting buffer is '0', the output will be '1'.

4050: Buffer:

• Used as a buffer to restore logic levels.

4066: Bilateral switch:

• An electrically controlled switch. When the enable input is high, an electrical connection is made between the other two pins.

74125: Tri-state driver:

• When enabled, the part acts as a buffer, with the input logic level appearing on the output.
• When not enabled, the output is effectively disconnected from the circuit.

See also:

• Logic family parts
• Simulation of Digital ICs
• Using electronics parts