| 153921 | 74AC251 | 8-Input Multiplexer with TRI-STATE Output | National Semiconductor |
| 153922 | 74AC251CW | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 153923 | 74AC251MTC | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 153924 | 74AC251MTCX | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 153925 | 74AC251PC | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 153926 | 74AC251SC | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 153927 | 74AC251SCX | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 153928 | 74AC251SJ | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 153929 | 74AC251SJX | 8-Input Multiplexer with 3-STATE Output | Fairchild Semiconductor |
| 153930 | 74AC253 | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153931 | 74AC253 | Dual 4-Input Multiplexer with TRI-STATE Outputs | National Semiconductor |
| 153932 | 74AC253CW | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153933 | 74AC253PC | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153934 | 74AC253SC | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153935 | 74AC253SCX | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153936 | 74AC253SJ | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153937 | 74AC253SJX | Dual 4-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153938 | 74AC257 | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153939 | 74AC257 | Quad 2-Input Multiplexer with TRI-STATE Outputs | National Semiconductor |
|
| 153940 | 74AC257 | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | SGS Thomson Microelectronics |
| 153941 | 74AC257 | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | ST Microelectronics |
| 153942 | 74AC257B | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | SGS Thomson Microelectronics |
| 153943 | 74AC257B | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | ST Microelectronics |
| 153944 | 74AC257CW | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153945 | 74AC257M | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | SGS Thomson Microelectronics |
| 153946 | 74AC257M | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | ST Microelectronics |
| 153947 | 74AC257MTC | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153948 | 74AC257MTCX | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153949 | 74AC257MTR | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | SGS Thomson Microelectronics |
| 153950 | 74AC257MTR | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | ST Microelectronics |
| 153951 | 74AC257PC | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153952 | 74AC257SC | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153953 | 74AC257SCX | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153954 | 74AC257SJ | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153955 | 74AC257SJX | Quad 2-Input Multiplexer with 3-STATE Outputs | Fairchild Semiconductor |
| 153956 | 74AC257TTR | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | SGS Thomson Microelectronics |
| 153957 | 74AC257TTR | QUAD 2 CHANNEL MULTIPLEXER (3-STATE) | ST Microelectronics |
| 153958 | 74AC273 | Octal D-Type Flip-Flop | Fairchild Semiconductor |
| 153959 | 74AC273 | Octal D Flip-Flop | National Semiconductor |
| 153960 | 74AC273 | OCTAL D-TYPE FLIP FLOP WITH CLEAR | SGS Thomson Microelectronics |
