Multiplexers

General concept
- 2n data inputs; n control inputs (called "selects"); 1 output
- Connects one of 2n inputs to the single output
- Select inputs "choose" which input is connected to the output

Example: A 2:1 Mux

1) Z = SIn1 + S'Ino

2) Two alternative forms

for the truth table

functional truth table

logical truth table

General concept