Multiplexers (con't)

• 2:1 mux: Z = S'In0 + SIn1

• 4:1 mux: Z = S0'S1'In0 + S0'S1In1 + S0S1'In2 + S0S1In3

• 8:1 mux: Z = S0'S1'S2'In0 + S0'S1S2In1 + ...

I0I1I2I3I4I5I6I7

S0 S1 S2

8:1mux

Z

I0I1I2I3

S0 S1

4:1mux

Z

I0I1

S0

2:1mux

Z

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