| 制造商 | 部件名 | 数据表 | 功能描述 |
 National Semiconductor ... | DM74LS55 |  112Kb/6P | 2-Wide, 4-Input AND-OR-INVERT Gate |
| DM74LS55M |  112Kb/6P | 2-Wide, 4-Input AND-OR-INVERT Gate |
| DM74LS55M14A |  112Kb/6P | 2-Wide, 4-Input AND-OR-INVERT Gate |
| DM74LS55N |  112Kb/6P | 2-Wide, 4-Input AND-OR-INVERT Gate |
| DM74LS55N14A |  112Kb/6P | 2-Wide, 4-Input AND-OR-INVERT Gate |
 National Semiconductor ... | DM74LS502N |  133Kb/6P | 8-Bit Successive Approximation Register |
| DM74LS502WM |  133Kb/6P | 8-Bit Successive Approximation Register |
 National Semiconductor ... | DM74LS51 |  63Kb/3P | DUAL 2-WIDE 2-INPUT, 2-WIDE 3-INPUT AND-OR-INVERT GATES |
 National Semiconductor ... | DM74LS51M |  63Kb/3P | DUAL 2-WIDE 2-INPUT, 2-WIDE 3-INPUT AND-OR-INVERT GATES |
 National Semiconductor ... | DM74LS51N |  63Kb/3P | DUAL 2-WIDE 2-INPUT, 2-WIDE 3-INPUT AND-OR-INVERT GATES |