A 8x1 Multiplexer. The 8 pins are the Inputs and the 3 pins below the left corner are selectands. Any binary no between 0 and 111 fed to the selectands will select the respective value from the inputs. The inputs start from 0, so the first input at the top is called input 0, then next input 1 and so on.
Ex: feeding 11(i.e =3) in the selectands will result in whatever value input 3(i.e 4th input) has (0/1) to the output.
