DM74LS257BN и другие
| Компонент | Описание | Производитель | |
| DM74LS257B | 3-STATE Quad 2-Data Selectors/Multiplexers |
Fairchild Semiconductor |
 |
| DM74LS257BCW | 3-STATE Quad 2-Data Selector/Multiplexer |
Fairchild Semiconductor |
|
| DM74LS257BM | 3-STATE Quad 2-Data Selectors/Multiplexers |
Fairchild Semiconductor |
|
| DM74LS257BM | TRI-STATE Quad 2-Data Selectors/Multiplexers |
National Semiconductor |
|
| DM74LS257BN | 3-STATE Quad 2-Data Selectors/Multiplexers |
Fairchild Semiconductor |
|
| DM74LS257BN | TRI-STATE Quad 2-Data Selectors/Multiplexers |
National Semiconductor |
|