| 制造商 | 部件名 | 数据表 | 功能描述 |
 National Semiconductor ... | DM74LS273N |  142Kb/6P | 8-Bit Register with Clear |
 National Semiconductor ... | DM74LS273N |  78Kb/3P | 8-BIT REGISTER WITH CLEAR |
 National Semiconductor ... | DM74LS273M |  142Kb/6P | 8-Bit Register with Clear |
| DM74LS273M |  78Kb/3P | 8-BIT REGISTER WITH CLEAR |
 National Semiconductor ... | DM74LS273 |  78Kb/3P | 8-BIT REGISTER WITH CLEAR |
 National Semiconductor ... | DM74LS279M |  137Kb/6P | Quad S-R Latches |
 National Semiconductor ... | DM74LS279N |  137Kb/6P | Quad S-R Latches |
 National Semiconductor ... | DM74LS27M |  58Kb/2P | TRIPLE 3-INPUT NOR GATES |
 National Semiconductor ... | DM74LS27N |  58Kb/2P | TRIPLE 3-INPUT NOR GATES |