full adder using demux IC 74139

Pavithra B
Pavithra B Rudraiah
• Created on Feb 3, 2025 • 0 • 0 • 3
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full adder using demux IC 74139
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Integrated Circuits Used

74LS139 74LS20 74LS04

Procedure

  1. Add IC 74LS139 into ICBase-1 (74LS139).
  2. Add IC 74LS20 into ICBase-2 (74LS20).
  3. Add IC 74LS04 into ICBase-3 (74LS04).
  4. Connect Pin-1 (Input) of ICBase-3 (74LS04) to Input-1.
  5. Connect Input-1 to Pin-19 (Input) of ICBase-1 (74LS139).
  6. Connect Pin-1 (Input) of ICBase-1 (74LS139) to Pin-2 (Output) of ICBase-3 (74LS04).
  7. Connect Pin-17 (Input) of ICBase-1 (74LS139) to Input-2.
  8. Connect Input-2 to Pin-3 (Input) of ICBase-1 (74LS139).
  9. Connect Input-3 to Pin-2 (Input) of ICBase-1 (74LS139).
  10. Connect Input-3 to Pin-18 (Input) of ICBase-1 (74LS139).
  11. Connect GND Port to Pin-8 (Ground) of ICBase-1 (74LS139).
  12. Connect VCC Port to Pin-20 (VCC) of ICBase-1 (74LS139).
  13. Connect Pin-1 (Input) of ICBase-2 (74LS20) to Pin-15 (Output) of ICBase-1 (74LS139).
  14. Connect Pin-2 (Input) of ICBase-2 (74LS20) to Pin-14 (Output) of ICBase-1 (74LS139).
  15. Connect Pin-15 (Input) of ICBase-2 (74LS20) to Pin-13 (Output) of ICBase-1 (74LS139).
  16. Connect Pin-4 (Input) of ICBase-2 (74LS20) to Pin-4 (Output) of ICBase-1 (74LS139).
  17. Connect Pin-16 (Input) of ICBase-2 (74LS20) to Pin-5 (Output) of ICBase-1 (74LS139).
  18. Connect Pin-18 (Input) of ICBase-2 (74LS20) to Pin-6 (Output) of ICBase-1 (74LS139).
  19. Connect Pin-19 (Input) of ICBase-2 (74LS20) to Pin-7 (Output) of ICBase-1 (74LS139).
  20. Connect Pin-7 (Output) of ICBase-1 (74LS139) to Pin-5 (Input) of ICBase-2 (74LS20).
  21. Connect Output-1 to Pin-6 (Output) of ICBase-2 (74LS20).
  22. Connect GND Port to Pin-7 (Ground) of ICBase-2 (74LS20).
  23. Connect VCC Port to Pin-20 (VCC) of ICBase-2 (74LS20).
  24. Connect Output-2 to Pin-14 (Output) of ICBase-2 (74LS20).
  25. Connect GND Port to Pin-7 (Ground) of ICBase-3 (74LS04).
  26. Connect VCC Port to Pin-20 (VCC) of ICBase-3 (74LS04).
  27. Connect Pin-5 (Input) of ICBase-2 (74LS20) to ICBase-1 (74LS139).
  28. Connect Output-2 to ICBase-2 (74LS20).