## How many 4×1 multiplexers are needed for 16×1 multiplexer?

In a 4:1 mux, you have 4 input pins, two select lines and one output. So, at the least you have to use 4 4:1 MUX, to obtain 16 input lines.

What is multiplexer design 4×1 and 8×1 multiplexer?

8×1 Multiplexer We know that 4×1 Multiplexer has 4 data inputs, 2 selection lines and one output. Whereas, 8×1 Multiplexer has 8 data inputs, 3 selection lines and one output. So, we require two 4×1 Multiplexers in first stage in order to get the 8 data inputs. The Truth table of 8×1 Multiplexer is shown below.

### Which IC is used for the implementation of 1 to 16 demux?

Explanation: IC 74154 is used for the implementation of 1-to-16 DEMUX, whose output is inverted input.

How many 4x MUX do you need to design an 8 1 mux?

8×1 Multiplexer So, we require two 4×1 Multiplexers in first stage in order to get the 8 data inputs. Since, each 4×1 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.

#### What is a 4-to-1 multiplexer?

A 4-to-1 multiplexer consists four data input lines as D0 to D3, two select lines as S0 and S1 and a single output line Y. The select lines S0 and S1 select one of the four input lines to connect the output line.

How many 4X1 MUXS and other circuit are needed to construct a 16X1 MUX?

5 4X1 MUX
A 16X1 MUX is created using 5 4X1 MUX as shown in the Fig 7.1, different FETs of varying W/L are connected as the inputs to the MUX, and the current flowng at the output of the MUX is measured.

## How many muxes are required in total to implement an 8 1 mux if the muxes that are available are 2 1 and 4 1 only select all correct answers *?

Similarly, While 8 : 1 MUX require seven(7) ​2 : 1 MUX, 16 : 1 MUX require fifteen(15) ​2 :1 MUX, 64 : 1 MUX requires sixty three(63)​ 2 : 1 MUX.

How many 2×1 multiplexers are required for the design of 8×1 multiplexer?

Therefore, the overall combination of two 4×1 Multiplexers and one 2×1 Multiplexer performs as one 8×1 Multiplexer.

### How many 2 1xx are needed to design a 8 1 mux?

Each of the 2-input muxes reduces the number of signals by 1, thereby requiring total of “7” 2-input muxes to implement an 8-input mux.

How to implement 8 MUX by using 4 : 1 MUX?

There are two ways to realize 8:1 mux using 4:1 mux. Both lower order select line S 1 S 0 is common to two of 4:1 mux. If the MSB select line S 2 = 0, lower mux is active and depending on lower order select lines I 0 − I 3 will be available at the output. For S 2 = 1, upper mux will be active.

#### What is the logic diagram for 81 MUX?

Logic diagram for 81 mux you can observe that the input signals are d0 d1 d2 d3 d4 d5 d6 d7 s0 s1 s2 and the output signal is out. Mux mux is a device which has 2n input lines. The data inputs of upper 4×1 multiplexer are i 7 to i 4 and the data inputs of lower 4×1 multiplexer are i 3 to i 0.

How many lines do you need for 4 > 1 MUX?

Assuming your 4>1 MUX uses two lines to select the appropriate output, you will need 5 lines to control your cascaded MUXes. 2 lines to address MUX1, 2 lines to address MUX2 and a fifth line to select the output from the 2>1 MUX. As you will only ever be selecting one of 8 inputs, your two lines that control each 4>1 MUX can be commoned.

## How many data inputs does an 8×1 multiplexer have?

We know that 8×1 Multiplexer has 8 data inputs, 3 selection lines and one output. 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.