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| # | Part: | Description: | Manuf. | Package | Pins | T°min | T°max | PDF size |
| 1. |  74HC251 | 8-input multiplexer; 3-state | NXP Semiconductors | PHILIPS | - | - | - | 62 Kb |
| 2. | 74HC251 | 8-input multiplexer; 3-state | NXP Semiconductors | PHILIPS | - | - | - | 62 Kb |
| 3. | M74HC251 | 8 BIT SIPO SHIFT REGISTER | STMicroelectronics | STMICROELECTRONICS | - | - | - | 248 Kb |
| 4. | M74HC251 | 8-CHANNEL MULTIPLEXER (3-STATE) | STMicroelectronics | STMICROELECTRONICS | - | - | - | 258 Kb |
| 5. | CD74HC251 | High Speed CMOS Logic 8-Input Multiplexer; Three-State | Texas Instruments | TI | - | - | - | 45 Kb |
| 6. | CD74HC251 | High-Speed CMOS Logic 8-Input Multiplexer, Three-State | Texas Instruments | TI | - | - | - | 273 Kb |
| 7. | MC74HC251 | 8-Input Data Selector/Multiplexer with 3-State Outputs | Motorola, Inc | MOTOROLA | - | - | - | 221 Kb |
| 8. | HD74HC251 | 1 of 8 Data Selectors/Multiplexers (with 3-state outputs) | Hitachi Semiconductor | HITACHI | - | - | - | 58 Kb |
| 9. | HD74HC251 | 1 of 8 Data Selectors/Multiplexers (with 3-state outputs) | Renesas Technology Corp | RENESAS | - | - | - | 107 Kb |
| 10. | SN74HC251 | DATA SELECTORS/MULTIPLEXERS WITH 3-STATE OUTPUTS | Texas Instruments | TI | - | - | - | 489 Kb |
| 11. | TC74HC251 | 8 CHANNEL MULTIPLEXER (3 STATE) | Toshiba Semiconductor | TOSHIBA | - | - | - | 263 Kb |
| 12. | SL74HC251 | 8-Input Data Selector/Multiplexer with 3-State Outputs | System Logic Semiconductor | SLS | - | - | - | 56 Kb |
| 13. | MM74HC251 | 8-Channel 3-STATE Multiplexer | Fairchild Semiconductor | FAIRCHILD | - | - | - | 79 Kb |
| 14. | MC54-74HC251 | 8-Input Data Selector/Multiplexer with 3-State Outputs | Motorola, Inc | MOTOROLA | - | - | - | 221 Kb |
| 15. | IN74HC251A | 8-INPUT DATA SELECTOR/MULTIPLEXER WITH 3-STATE OUTPUTS | Integral Corp. | INTEGRAL | - | - | - | 151 Kb |
| 16. | IN74HC251A | 8-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS | IK Semicon Co., Ltd | IKSEMICON | - | - | - | 160 Kb |
| 17. | KK74HC251A | 8-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS | KODENSHI KOREA CORP. | KODENSHI | - | - | - | 170 Kb |
| 18. | KK74HC251AD | 8-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS | KODENSHI KOREA CORP. | KODENSHI | - | - | - | 170 Kb |
| 19. | IN74HC251AD | 8-Input Data Selector/Multiplexer with 3-State Outputs High-Performance Silicon-Gate CMOS | IK Semicon Co., Ltd | IKSEMICON | - | - | - | 160 Kb |
| 20. | TC74HC251AF | 8-Channel Multiplexer (3-state) | Toshiba Semiconductor | TOSHIBA | - | - | - | 311 Kb |
| 21. | TC74HC251AF | 8 CHANNEL MULTIPLEXER (3 STATE) | Toshiba Semiconductor | TOSHIBA | - | - | - | 263 Kb |
