Digital Circuits & Design, 1st Education by Pearson

6.32 | Chapter 6

S

2

I

0

I

1

I

2

I

3

S

1

I

4

I

5

I

6

I

7

S

0

O

2

3

-to-1

MUX

E

FIGURE 6.38 | Block diagram of 23-to-1 MUX

6.4.4 | Sixteen-to-One Multiplexer

A sixteen-to-one (or 2

4

-to-1 or 16-to-1) multiplexer (MUX) is a combinational circuit with

sixteen input lines, I

0

to I

15

, one output line, O and four selection lines, S

3

, S

2

, S

1

and S

0

. On

receiving active low enable input, multiplexer is able to perform its intended function. A

2

4

-to-1 (or 16-to-1) multiplexer selects binary information present on any one of I

0

, I

1

, I

2

, I

3

,

I

4

, I

5

, I

6

, I

7

, I

8

, I

9

, I

10

, I

11

, I

12

, I

13

, I

14

or I

15

input line, depending upon the logic status of four selec-

tion inputs, S

3

, S

2

, S

1

and ...