Electronic – What does this schematic mean

multiplexersymbol [~]

I know that this is a 4:1 MUX, but what does the little line across the w1 w2 selection line mean?

You know, the little black line that has a "2" next to it.

Has it something to do with "array" or something?

enter image description here

Best Answer

This notation means a bus line with the width noted by the number written next to it. In your case it is 2-bit wide bus. It is used to make the drawing less convoluted by reducing lines drawn.