Question

The number of 4 line to 16 line decoders required to make an 8 line to 256 line decoder is

Answer 1

Aim: To construct 8 X 256 decoder

8 X 256 means that we have 8 inputs to make 256 outputs

Since we need 256 output we need 4 X 16 decoders that is 16 times 4 inputs which is equivalent to 64 decoders

Answer 2

Answer:

17

Explanation:

1st level 256/16=16

2nd level 16/16=1

Total=16+1=17