Answer to Question #242496 in Electrical Engineering for rahul rajput

Question

Construct a 5 to 32-line decoder with four 3 to 8 decoders, with enable and 2 to 4-line decoder with the help of truth table, use block diagram for it.

Answer 1

Provided:

5 to 32-line decoder with four 3 to 8 decoders

We  have 5 input lines and you need output lines

now let lines are

d0 lsb

d1

d2

d3

d4 msb

We connect d3 and d4 to 2-to-4 line decoder

connect d0, d1, and d2 to all 3-to-8 line decoders.

Now we connect output of 2-to-4 line decoder to enable pins of 3-to-8 line decoders such that the first output makes first 3-to-8 line decoders enable.

thats it 32 output of 3-to-8 line decoders are we are required output

We can illustrate this as captured below: