| 129481 | 74AC251 | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 129482 | 74AC251 | 8-Input Multiplexer with TRI-STATE Output | National Semiconductor |
| 129483 | 74AC251CW | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 129484 | 74AC251MTC | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 129485 | 74AC251MTCX | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 129486 | 74AC251PC | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 129487 | 74AC251SC | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 129488 | 74AC251SCX | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 129489 | 74AC251SJ | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 129490 | 74AC251SJX | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 129491 | 74AC253 | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129492 | 74AC253 | Dual 4-Input Multiplexer with TRI-STATE Outputs | National Semiconductor |
| 129493 | 74AC253CW | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129494 | 74AC253PC | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129495 | 74AC253SC | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129496 | 74AC253SCX | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129497 | 74AC253SJ | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129498 | 74AC253SJX | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129499 | 74AC257 | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
|
| 129500 | 74AC257 | Quad 2-Input Multiplexer with TRI-STATE Outputs | National Semiconductor |
| 129501 | 74AC257 | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | SGS Thomson Microelectronics |
| 129502 | 74AC257 | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | ST Microelectronics |
| 129503 | 74AC257B | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | SGS Thomson Microelectronics |
| 129504 | 74AC257B | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | ST Microelectronics |
| 129505 | 74AC257CW | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129506 | 74AC257M | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | SGS Thomson Microelectronics |
| 129507 | 74AC257M | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | ST Microelectronics |
| 129508 | 74AC257MTC | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129509 | 74AC257MTCX | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129510 | 74AC257MTR | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | SGS Thomson Microelectronics |
| 129511 | 74AC257MTR | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | ST Microelectronics |
| 129512 | 74AC257PC | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129513 | 74AC257SC | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129514 | 74AC257SCX | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129515 | 74AC257SJ | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129516 | 74AC257SJX | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 129517 | 74AC257TTR | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | SGS Thomson Microelectronics |
| 129518 | 74AC257TTR | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | ST Microelectronics |
| 129519 | 74AC273 | Octal D-Type Flip-Flop | Fairchild Semiconductor |
| 129520 | 74AC273 | Octal D Flip-Flop | National Semiconductor |
