To design BCD to Decimal decoder using IC-7442





  1. Click on the components button and place all the component.
  2. Make connections as per the circuit diagram and pin diagram of IC.
    3. Fig.1 Circuit diagram of BCD to Decimal Decoder
    Fig. 2 Pin diagram of IC 7442
  3. Click on 'Check Connections' button. If connections are right, click on ‘OK’, then Simulation will become active.
  4. Provide the input by clicking toggle switches A0, A1, A2 and A3.
  5. Fill the observed values in the Truth Table.
  6. Verify Truth Table by clicking on 'Check' button, if outputs are correct then click on OK.

Truth table

S.No A0 A1 A2 A3 D0 D1 D2 D3 D4 D5 D6 D7 D8 D9
0 0 0 0 0
1 0 0 0 1
2 0 0 1 0
3 0 0 1 1
4 0 1 0 0
5 0 1 0 1
6 0 1 1 0
7 0 1 1 1
8 1 0 0 0
9 1 0 0 1
I 1 0 1 0
N 1 0 1 1
V 1 1 0 0
A 1 1 0 1
L 1 1 1 0
ID 1 1 1 1