DM74LS20MX и другие
| Компонент | Описание | Производитель | |
| DM74LS20M | Dual 4-Input NAND Gate |
Fairchild Semiconductor |
 |
| DM74LS20M | Dual 4-Input NAND Gates |
National Semiconductor |
|
| DM74LS20MX | Dual 4-Input NAND Gate |
Fairchild Semiconductor |
|