4 Petris Christian SN74LS20N 2011-02-22 DIP TTL Logic IC 74xx Logic Gates NAND 74xx Series SN74LS20N DIP14 [THT] Dual 4-Input Positive-NAND Gates in part 4

in part 1

out NAND 1

digital ground

out NAND 2

in part 2

in part 2

NC

in part 2

in part 2

in part 1

in part 2

power simpply +5V

NC