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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. | SN74LS257BD | Quad 2-input multiplexer with 3-state outputs | MOT | SOIC | 16 | 0°C | 70°C | 182K |
| 2. | SN74LS257BD | Quad 2-Input Multiplexer with 3-State Outputs | ON | SOIC | 16 | - | - | 118K |
| 3. | SN74LS257BD | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | TI | D | 16 | 0°C | 70°C | 248K |
| 4. | SN74LS257BDR | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | TI | D | 16 | 0°C | 70°C | 248K |
| 5. | SN74LS257BDR2 | Quad 2-Input Multiplexer with 3-State Outputs | ON | SOIC | 16 | - | - | 118K |
| 6. | SN74LS257BM | Quad 2-Input Multiplexer with 3-State Outputs | ON | - | - | - | - | 118K |
| 7. | SN74LS257BML1 | Quad 2-Input Multiplexer with 3-State Outputs | ON | - | - | - | - | 118K |
| 8. | SN74LS257BML2 | Quad 2-Input Multiplexer with 3-State Outputs | ON | - | - | - | - | 118K |
| 9. | SN74LS257BMR1 | Quad 2-Input Multiplexer with 3-State Outputs | ON | - | - | - | - | 118K |
| 10. | SN74LS257BMR2 | Quad 2-Input Multiplexer with 3-State Outputs | ON | - | - | - | - | 118K |
| 11. | SN74LS257BN | Quad 2-input multiplexer with 3-state outputs | MOT | PDIP | 16 | 0°C | 70°C | 182K |
| 12. | SN74LS257BN | Quad 2-Input Multiplexer with 3-State Outputs | ON | PDIP | 16 | - | - | 118K |
| 13. | SN74LS257BN | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | TI | N | 16 | 0°C | 70°C | 248K |
| 14. | SN74LS257BN3 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | TI | N | 16 | 0°C | 70°C | 248K |
