How many data inputs does a multiplexer have?
Multiplexer is a combinational circuit that has maximum of 2 n data inputs, ‘n’ selection lines and single output line. One of these data inputs will be connected to the output based on the values of selection lines.
What is the difference between a multiplexer and A mux?
The multiplexer or MUX is a digital switch, also called as data selector. It is a Combinational Logic Circuit with more than one input line, one output line and more than one select line.
How is a multiplexer a combinational circuit?
Multiplexer is a combinational circuit that has maximum of 2 n data inputs, ‘n’ selection lines and single output line. One of these data inputs will be connected to the output based on the values of selection lines. Since there are ‘n’ selection lines, there will be 2 n possible combinations of zeros and ones.
Which is the output of the first stage 8×1 multiplexer?
The outputs of first stage 8×1 Multiplexers are applied as inputs of 2×1 Multiplexer that is present in second stage. The other selection line, s3 is applied to 2×1 Multiplexer. If s 3 is zero, then the output of 2×1 Multiplexer will be one of the 8 inputs Is 7 to I 0 based on the values of selection lines s 2, s 1 & s 0.
What happens if the Select line is low in a multiplexer?
If the select line is low, then the output will be switched to D0 input, whereas if select line is high, then the output will be switched to D1 input. The figure below shows the block diagram of a 2-to-1 multiplexer which connects two 1-bit inputs to a common destination.
Why do we need 2×1 multiplexer in second stage?
Whereas, 16×1 Multiplexer has 16 data inputs, 4 selection lines and one output. So, we require two 8×1 Multiplexers in first stage in order to get the 16 data inputs. Since, each 8×1 Multiplexer produces one output, we require a 2×1 Multiplexer in second stage by considering the outputs of first stage as inputs and to produce the final output.
How many selection lines does a multiplexer have?
Multiplexer is a combinational circuit that has maximum of 2n data inputs, ‘n’ selection lines and single output line. One of these data inputs will be connected to the output based on the values of selection lines.
What is the block diagram of a multiplexer?
Multiplexer is also called as Mux. 4×1 Multiplexer 4×1 Multiplexer has four data inputs I 3, I 2, I 1 & I 0, two selection lines s 1 & s 0 and one output Y. The block diagram of 4×1 Multiplexer is shown in the following figure.
When to enable or disable a multiplexer in a computer?
There is an additional Strobe or Enable control input E/Strobe, which enables and disables all the multiplexers, i.e., when E=1, outputs of all the multiplexer is zero irrespective of the value of S. All the multiplexers are activated only when the E / Strobe input is LOW.