Question

How many select lines would be required for an 8-line-to-1-line multiplexer?

Answer 1

The answer is 3 I've given explaination in pic

Answer 2

The number of selection lines in 8-line-to-1-line multiplexer:

Multiplexer:

• Multiplexer is a circuit which is used to take several inputs which are in the binary numbers i.e., 0 or 1.
• In general multiplexer is in the form of $2^{n}$:1, here n is the number of selection lines.
• Multiplexer is also written as MUX.

8-line-to-1-line multiplexer:

• This multiplexer can takes 8 input signals and outputs one signal.
• This output is generated based on the selection lines.
• It can be written as $2^{3}$:1.
• By observation in 8:1 multiplexer n = 3.
• In 8:1 MUX we need to use 3 selection lines to select the output.

Hence the number of selection lines in 8-line-to-1-line multiplexer is 3.