# 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