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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  DM74S251 | TRI-STATE 1 of 8 Line Data Selector/Multiplexer | National Semiconductor | NSC | - | - | - | 119 Kb |
| 2. | HD74S251 | TTL HD74/HD74S Series | Hitachi Semiconductor | HITACHI | - | - | - | 144 Kb |
| 3. | SN74S251 | DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 321 Kb |
| 4. | SN74S251D | DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 321 Kb |
| 5. | SN74S251N | DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 321 Kb |
| 6. | DM74S253 | Dual 3-STATE 1-of-4 Line Data Selector/Multiplexer | Fairchild Semiconductor | FAIRCHILD | - | - | - | 52 Kb |
| 7. | SN74S253 | DUAL 4-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 632 Kb |
| 8. | SN74S253D | DUAL 4-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 632 Kb |
| 9. | DM74S253N | Dual 3-STATE 1-of-4 Line Data Selector/Multiplexer | Fairchild Semiconductor | FAIRCHILD | - | - | - | 52 Kb |
| 10. | SN74S253N | DUAL 4-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 632 Kb |
| 11. | DM74S257 | 3-STATE Quad 1-of-2 Data Selector/Multiplexer | Fairchild Semiconductor | FAIRCHILD | - | - | - | 51 Kb |
| 12. | DM74S257 | TRI-STATE QUAD 1 OF 2 DATA SELECTORS / MULTIPLEXERS | National Semiconductor | NSC | - | - | - | 150 Kb |
| 13. | HD74S257 | TTL HD74/HD74S Series | Hitachi Semiconductor | HITACHI | - | - | - | 144 Kb |
| 14. | SN74S257 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 15. | SN74S257 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 1016 Kb |
| 16. | SN74S257 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 17. | DM74S257CW | Quad 3-STATE 2-to-1 Line Data Selector/Multiplexer | Fairchild Semiconductor | FAIRCHILD | - | - | - | 51 Kb |
| 18. | SN74S257D | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 19. | SN74S257D | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 20. | SN74S257DE4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
