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1 DM74LS33 Quad 2-Input NOR Buffer with Open-Collector Outputs 46K FAIRCHILD 4225075
2 DM74LS33 QUAD 2-INPUT NOR BUFFER WITH OPEN-COLLECTOR OUTPUTS 50K NSC 4225074
3 DM74LS33M Quad 2-Input NOR Buffer with Open-Collector Outputs 46K FAIRCHILD 4225073
4 DM74LS33M QUAD 2-INPUT NOR BUFFER WITH OPEN-COLLECTOR OUTPUTS 50K NSC 4225072
5 DM74LS33MX Quad 2-input NOR Gate 46K FAIRCHILD 3552426
6 DM74LS33N Quad 2-Input NOR Buffer with Open-Collector Outputs 46K FAIRCHILD 4225071
7 DM74LS33N QUAD 2-INPUT NOR BUFFER WITH OPEN-COLLECTOR OUTPUTS 50K NSC 4225070