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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  74HC257 | High Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs | Texas Instruments | TI | - | - | - | 49 Kb |
| 2. | 74HC257 | High Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs | Texas Instruments | TI | - | - | - | 49 Kb |
| 3. | 74HC257 | Quad. 2-to-1-line Data Selectors/Multiplexers(with noninverted 3-state outputs) | Hitachi Semiconductor | HITACHI | - | - | - | 55 Kb |
| 4. | 74HC257 | Quad 2-input multiplexer 3-state | NXP Semiconductors | PHILIPS | - | - | - | 85 Kb |
| 5. | 74HC257 | Quad 2-input multiplexer; 3-state | NXP Semiconductors | NXP | - | - | - | 166 Kb |
| 6. | M74HC257 | HC258QUAD 2CHANNEL MULTIPLEXER 3-STATE, INVERTING HC257 QUAD 2 CHANNEL MULTIPLEXER 3-STATE | STMicroelectronics | STMICROELECTRONICS | - | - | - | 257 Kb |
| 7. | M74HC257 | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | STMicroelectronics | STMICROELECTRONICS | - | - | - | 191 Kb |
| 8. | CD74HC257 | High Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs | Texas Instruments | TI | - | - | - | 49 Kb |
| 9. | CD74HC257 | High-Speed CMOS Logic Quad 2-Input Multiplexer with Three-State Non-Inverting Outputs | Texas Instruments | TI | - | - | - | 279 Kb |
| 10. | HD74HC257 | Quad. 2-to-1-line Data Selectors/Multiplexers(with noninverted 3-state outputs) | Hitachi Semiconductor | HITACHI | - | - | - | 55 Kb |
| 11. | IN74HC257 | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS | Integral Corp. | INTEGRAL | - | - | - | 112 Kb |
| 12. | SN74HC257 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 475 Kb |
| 13. | SN74HC257 | QUADRUPLE 2-LINE TO 1-LINE DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 476 Kb |
| 14. | SL74HC257 | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs | System Logic Semiconductor | SLS | - | - | - | 51 Kb |
| 15. | TC74HC257 | QUAD 2-CHANEL MULTIPLEXER (3-STATE) | Toshiba Semiconductor | TOSHIBA | - | - | - | 251 Kb |
| 16. | HD74HC257 | Quad. 2-to-1-line Data Selectors/Multiplexers(with noninverted 3-state outputs) | Renesas Technology Corp | RENESAS | - | - | - | 105 Kb |
| 17. | IN74HC257A | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS | IK Semicon Co., Ltd | IKSEMICON | - | - | - | 156 Kb |
| 18. | KK74HC257A | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS | KODENSHI KOREA CORP. | KODENSHI | - | - | - | 166 Kb |
| 19. | IN74HC257AD | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS | IK Semicon Co., Ltd | IKSEMICON | - | - | - | 156 Kb |
| 20. | KK74HC257AD | Quad 2-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS | KODENSHI KOREA CORP. | KODENSHI | - | - | - | 166 Kb |
| 21. | TC74HC257AF | QUAD 2-CHANEL MULTIPLEXER (3-STATE) | Toshiba Semiconductor | TOSHIBA | - | - | - | 251 Kb |
