Practical 4 Decoder

Harjeet
Harjeet Kaur
• Created on May 5, 2021 • 0 • 0 • 2
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Practical 4 Decoder
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Integrated Circuits Used

74LS138 74LS20

Procedure

  1. Connect Output-1 to ICBase-2 (74LS20).
  2. Add IC 74LS138 into ICBase-1 (74LS138).
  3. Add IC 74LS20 into ICBase-2 (74LS20).
  4. Connect GND Port to Pin-8 (Ground) of ICBase-1 (74LS138).
  5. Connect VCC Port to Pin-20 (VCC) of ICBase-1 (74LS138).
  6. Connect GND Port to Pin-7 (Ground) of ICBase-2 (74LS20).
  7. Connect VCC Port to Pin-20 (VCC) of ICBase-2 (74LS20).
  8. Connect VCC Port to Pin-6 (Input) of ICBase-1 (74LS138).
  9. Connect GND Port to Pin-4 (Input) of ICBase-1 (74LS138).
  10. Connect GND Port to Pin-5 (Input) of ICBase-1 (74LS138).
  11. Connect Input-15 to Pin-1 (Input) of ICBase-1 (74LS138).
  12. Connect Input-14 to Pin-2 (Input) of ICBase-1 (74LS138).
  13. Connect Input-13 to Pin-3 (Input) of ICBase-1 (74LS138).
  14. Connect Pin-1 (Input) of ICBase-2 (74LS20) to Pin-18 (Output) of ICBase-1 (74LS138).
  15. Connect Pin-2 (Input) of ICBase-2 (74LS20) to Pin-17 (Output) of ICBase-1 (74LS138).
  16. Connect Pin-4 (Input) of ICBase-2 (74LS20) to Pin-15 (Output) of ICBase-1 (74LS138).
  17. Connect Pin-5 (Input) of ICBase-2 (74LS20) to Pin-7 (Output) of ICBase-1 (74LS138).
  18. Connect Output-0 to Pin-6 (Output) of ICBase-2 (74LS20).
  19. Connect Output-1 to Pin-14 (Output) of ICBase-2 (74LS20).
  20. Connect Pin-15 (Input) of ICBase-2 (74LS20) to Pin-16 (Output) of ICBase-1 (74LS138).
  21. Connect Pin-16 (Input) of ICBase-2 (74LS20) to Pin-14 (Output) of ICBase-1 (74LS138).
  22. Connect Pin-18 (Input) of ICBase-2 (74LS20) to Pin-13 (Output) of ICBase-1 (74LS138).
  23. Connect Pin-19 (Input) of ICBase-2 (74LS20) to Pin-7 (Output) of ICBase-1 (74LS138).