| Fabricante Electrónico | No. de pieza | Datasheet | Descripción Electrónicos |
 National Semiconductor ... | 54LS253 |  158Kb/6P | TRI-STATE Data Selectors/Multiplexers |
| 54LS253DMQB |  158Kb/6P | TRI-STATE Data Selectors/Multiplexers |
| 54LS253FMQB |  158Kb/6P | TRI-STATE Data Selectors/Multiplexers |
| 54LS253LMQB |  158Kb/6P | TRI-STATE Data Selectors/Multiplexers |
| 54LS256 |  127Kb/6P | Dual 4-Bit Addressable Latch |
| 54LS256DMQB |  127Kb/6P | Dual 4-Bit Addressable Latch |
| 54LS256FMQB |  127Kb/6P | Dual 4-Bit Addressable Latch |
 National Semiconductor ... | 54LS257 |  163Kb/8P | TRI-STATE Quad 2-Data Selectors/Multiplexers |
 National Semiconductor ... | 54LS257A |  163Kb/8P | TRI-STATE Quad 2-Data Selectors/Multiplexers |
| 54LS257ADMQB |  163Kb/8P | TRI-STATE Quad 2-Data Selectors/Multiplexers |
| 54LS257AFMQB |  163Kb/8P | TRI-STATE Quad 2-Data Selectors/Multiplexers |
| 54LS257ALMQB |  163Kb/8P | TRI-STATE Quad 2-Data Selectors/Multiplexers |
 National Semiconductor ... | 54LS258ADMQB |  163Kb/8P | TRI-STATE Quad 2-Data Selectors/Multiplexers |
| 54LS258AFMQB |  163Kb/8P | TRI-STATE Quad 2-Data Selectors/Multiplexers |