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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  DM74LS257BN | TRI-STATE Quad 2-Data Selectors/Multiplexers | National Semiconductor | NSC | - | - | - | 171 Kb |
| 2. | DM74LS257BN | 3-STATE Quad 2-Data Selectors/Multiplexers | Fairchild Semiconductor | FAIRCHILD | - | - | - | 59 Kb |
| 3. | SN74LS257BN | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 4. | SN74LS257BN | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 5. | SN74LS257BN | LOW POWER SCHOTTKY | ON Semiconductor | ONSEMI | - | - | - | 129 Kb |
| 6. | ACE705257BN+ | High efficiency, Low supply current, step-up DC/DC Controller | ACE Technology Co., LTD. | ACE | - | - | - | 659 Kb |
| 7. | SN74LS257BN3 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 8. | SN74LS257BN3 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 9. | ACE50257BNA+ | 400mA CMOS Low Dropout Voltage Low consumption Regulator | ACE Technology Co., LTD. | ACE | - | - | - | 312 Kb |
| 10. | ACE50257BNB+ | 400mA CMOS Low Dropout Voltage Low consumption Regulator | ACE Technology Co., LTD. | ACE | - | - | - | 312 Kb |
| 11. | SN74LS257BNE4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 12. | SN74LS257BNE4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 13. | SN74LS257BNSR | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 14. | SN74LS257BNSR | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 15. | SN74LS257BNSRE4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 660 Kb |
| 16. | SN74LS257BNSRE4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
| 17. | SN74LS257BNSRG4 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS | Texas Instruments | TI | - | - | - | 873 Kb |
