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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  DM74LS20 | Dual 4-Input NAND Gate | Fairchild Semiconductor | FAIRCHILD | - | - | - | 50 Kb |
| 2. | DM74LS20M | Dual 4-Input NAND Gate | Fairchild Semiconductor | FAIRCHILD | - | - | - | 50 Kb |
| 3. | DM74LS20M | Dual 4-Input NAND Gates | National Semiconductor | NSC | - | - | - | 130 Kb |
| 4. | DM74LS20MX | Dual 4-Input NAND Gate | Fairchild Semiconductor | FAIRCHILD | - | - | - | 50 Kb |
| 5. | DM74LS20N | Dual 4-Input NAND Gate | Fairchild Semiconductor | FAIRCHILD | - | - | - | 50 Kb |
| 6. | DM74LS20N | Dual 4-Input NAND Gates | National Semiconductor | NSC | - | - | - | 130 Kb |
| 7. | DM74LS21 | Dual 4-Input AND Gates | National Semiconductor | NSC | - | - | - | 126 Kb |
| 8. | DM74LS22 | DUAL 4-INPUT NAND GATE (WITH OPEN-COLLECTOR OUTPUT) | National Semiconductor | NSC | - | - | - | 55 Kb |
| 9. | DM74LS221 | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs | Fairchild Semiconductor | FAIRCHILD | - | - | - | 114 Kb |
| 10. | DM74LS221 | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs | National Semiconductor | NSC | - | - | - | 142 Kb |
| 11. | DM74LS221CW | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs | Fairchild Semiconductor | FAIRCHILD | - | - | - | 114 Kb |
| 12. | DM74LS221M | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs | Fairchild Semiconductor | FAIRCHILD | - | - | - | 114 Kb |
| 13. | DM74LS221M | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs | National Semiconductor | NSC | - | - | - | 142 Kb |
| 14. | DM74LS221MX | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs | Fairchild Semiconductor | FAIRCHILD | - | - | - | 114 Kb |
| 15. | DM74LS221N | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs | Fairchild Semiconductor | FAIRCHILD | - | - | - | 114 Kb |
| 16. | DM74LS221N | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs | National Semiconductor | NSC | - | - | - | 142 Kb |
| 17. | DM74LS221SJ | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs | Fairchild Semiconductor | FAIRCHILD | - | - | - | 114 Kb |
| 18. | DM74LS221SJX | Dual Non-Retriggerable One-Shot with Clear and Complementary Outputs | Fairchild Semiconductor | FAIRCHILD | - | - | - | 114 Kb |
| 19. | DM74LS22M | DUAL 4-INPUT NAND GATE (WITH OPEN-COLLECTOR OUTPUT) | National Semiconductor | NSC | - | - | - | 55 Kb |
| 20. | DM74LS22N | DUAL 4-INPUT NAND GATE (WITH OPEN-COLLECTOR OUTPUT) | National Semiconductor | NSC | - | - | - | 55 Kb |
