full adder using 4:1 MUX

Ganesh
Ganesh Langhi
• Created on Sep 2, 2025 • 1 • 1 • 2
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full adder using 4:1 MUX
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Integrated Circuits Used

74LS138 74LS20

Procedure

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