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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  SN74LS257 | LOW POWER SCHOTTKY | ON Semiconductor | ONSEMI | - | - | - | 129 Kb |
| 2. | SN74LS257 | LOW POWER SCHOTTKY | ON Semiconductor | ONSEMI | - | - | - | 129 Kb |
| 3. | SN74LS257 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 4. | SN74LS257B | LOW POWER SCHOTTKY | ON Semiconductor | ONSEMI | - | - | - | 129 Kb |
| 5. | SN74LS257B | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 1016 Kb |
| 6. | SN74LS257B | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 7. | SN74LS257B | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 8. | SN74LS257BD | LOW POWER SCHOTTKY | ON Semiconductor | ONSEMI | - | - | - | 129 Kb |
| 9. | SN74LS257BD | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 10. | SN74LS257BD | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 11. | SN74LS257BDE4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 12. | SN74LS257BDE4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 13. | SN74LS257BDG4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 14. | SN74LS257BDR | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 15. | SN74LS257BDR | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 16. | SN74LS257BDR2 | Quad 2-Input Multiplexer with 3-State Outputs | ON Semiconductor | ONSEMI | - | - | - | 129 Kb |
| 17. | SN74LS257BDRE4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 18. | SN74LS257BDRE4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 19. | SN74LS257BDRG4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 20. | SN74LS257BM | Quad 2-Input Multiplexer with 3-State Outputs | ON Semiconductor | ONSEMI | - | - | - | 129 Kb |
| 21. | SN74LS257BML1 | Quad 2-Input Multiplexer with 3-State Outputs | ON Semiconductor | ONSEMI | - | - | - | 129 Kb |
