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1 74LS21 Dual 4-input Positive AND Gates 44K HITACHI 4336211
2 74LS21 DUAL 4-INPUT POSITIVE-AND GATES 521K TI 4336210
3 74LS21 DUAL 4-INPUT POSITIVE AND GATE 52K ETC 4336209
4 74LS21 DUAL 4-INPUT POSITIVE AND GATE 56K ETC1 1025106
5 74LS21DC DUAL 4-INPUT POSITIVE AND GATE 52K ETC 4336208
6 74LS21DC DUAL 4-INPUT POSITIVE AND GATE 56K ETC1 1025105
7 74LS21FC DUAL 4-INPUT POSITIVE AND GATE 52K ETC 4336207
8 74LS21FC DUAL 4-INPUT POSITIVE AND GATE 56K ETC1 1025104
9 74LS21PC DUAL 4-INPUT POSITIVE AND GATE 52K ETC 4336206
10 74LS21PC DUAL 4-INPUT POSITIVE AND GATE 56K ETC1 1025103