demultiplexer

[jidan]

I need to understand demultiplexer

input 1
select line n
output 2 n

S0  S1     I   D
0    0     0  d0
0    1     1  d1
1    0     0  d2
1    1     1  d3

select line S0 , S1
Input I
Output D

how to determine the value D0 D1 D2 And D3 ?

 

[djsfantasi]

Deleted original post - confused mux and demux.

D represents one of four outputs, d0 through d3. Depending on the value represented by s0 and s1, the signal I is passed on to one of the four outputs. The others are usually low (digital). For example, if s0 =1 and s1=1, then the value of I is sent to d3.

Your column for I is misleading, as whatever the input is, it is sent to the selected output. The selected output is defined in the manner described above.