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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  DM74AS257 | 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers | Fairchild Semiconductor | FAIRCHILD | - | - | - | 66 Kb |
| 2. | DM74AS257 | 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers | Fairchild Semiconductor | FAIRCHILD | - | - | - | 285 Kb |
| 3. | SN74AS257 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 134 Kb |
| 4. | AS2574B | 20 NUMBER ONE TOUCH DIALLER WITH SERIAL BUS FOR DISPLAY DRIVER | austriamicrosystems AG | AMSCO | - | - | - | 214 Kb |
| 5. | AS2574BN | 20 NUMBER ONE TOUCH DIALLER WITH SERIAL BUS FOR DISPLAY DRIVER | austriamicrosystems AG | AMSCO | - | - | - | 214 Kb |
| 6. | AS2574BP | 20 NUMBER ONE TOUCH DIALLER WITH SERIAL BUS FOR DISPLAY DRIVER | austriamicrosystems AG | AMSCO | - | - | - | 214 Kb |
| 7. | AS2578 | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS | austriamicrosystems AG | AMSCO | - | - | - | 301 Kb |
| 8. | AS2578B | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS | austriamicrosystems AG | AMSCO | - | - | - | 301 Kb |
| 9. | AS2578BN | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS | austriamicrosystems AG | AMSCO | - | - | - | 301 Kb |
| 10. | AS2578BP | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS | austriamicrosystems AG | AMSCO | - | - | - | 301 Kb |
| 11. | AS2578N | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS | austriamicrosystems AG | AMSCO | - | - | - | 301 Kb |
| 12. | AS2578P | TELEPHONE CONTROLLER WITH 13 MEMORIES AND 2-WIRE BUS | austriamicrosystems AG | AMSCO | - | - | - | 301 Kb |
| 13. | SN74AS257D | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 134 Kb |
| 14. | SN74AS257DR | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 134 Kb |
| 15. | DM74AS257M | 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers | Fairchild Semiconductor | FAIRCHILD | - | - | - | 66 Kb |
| 16. | DM74AS257M | 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers | Fairchild Semiconductor | FAIRCHILD | - | - | - | 285 Kb |
| 17. | DM74AS257MX | 3-STATE Quad 1 of 2 Line Data Selectors/Multiplexers | Fairchild Semiconductor | FAIRCHILD | - | - | - | 66 Kb |
| 18. | DM74AS257N | 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers | Fairchild Semiconductor | FAIRCHILD | - | - | - | 285 Kb |
| 19. | DM74AS257N | 3-STATE Quad 1 of 2 Line Data Selector/Multiplexers | Fairchild Semiconductor | FAIRCHILD | - | - | - | 66 Kb |
| 20. | SN74AS257N | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 134 Kb |
