Multiplexer

Multiplexer is an electronic circuit that functions to select one among many inputs into one output. The number of bits from the selector (selector) to determine the number of input channels can be received.
With provisions are:

I = 2 ^ s

where:
I: Number of input channels can be received
s: The number of bits of the selector or the number of lines of voters

for example if we want the 14 input channels, then the minimum number of bits of selectors who should we meet is 4 bits. Where is the selector 4 bits can represent 16 channels of input.