| 制造商 | 部件名 | 数据表 | 功能描述 |
 National Semiconductor ... | 54F253DM |  168Kb/8P | Dual 4-Input Multiplexer with TRI-STATE Outputs |
 National Semiconductor ... | 54F253FM |  168Kb/8P | Dual 4-Input Multiplexer with TRI-STATE Outputs |
| 54F253LL |  168Kb/8P | Dual 4-Input Multiplexer with TRI-STATE Outputs |
 National Semiconductor ... | 54F251ADM |  165Kb/8P | 8-Input Multiplexer with TRI-STATE Outputs |
| 54F251AFM |  165Kb/8P | 8-Input Multiplexer with TRI-STATE Outputs |
| 54F251ALL |  165Kb/8P | 8-Input Multiplexer with TRI-STATE Outputs |
| 54F253 |  168Kb/8P | Dual 4-Input Multiplexer with TRI-STATE Outputs |
| 54F257A |  157Kb/8P | Quad 2-Input Multiplexer with TRI-STATE Outputs |
| 54F257ADM |  157Kb/8P | Quad 2-Input Multiplexer with TRI-STATE Outputs |
| 54F257ADMDMQB |  157Kb/8P | Quad 2-Input Multiplexer with TRI-STATE Outputs |
| 54F257ADMQB |  157Kb/8P | Quad 2-Input Multiplexer with TRI-STATE Outputs |
| 54F257AFM |  157Kb/8P | Quad 2-Input Multiplexer with TRI-STATE Outputs |
| 54F257AFMDMQB |  157Kb/8P | Quad 2-Input Multiplexer with TRI-STATE Outputs |
| 54F257AFMQB |  157Kb/8P | Quad 2-Input Multiplexer with TRI-STATE Outputs |
| 54F257ALL |  157Kb/8P | Quad 2-Input Multiplexer with TRI-STATE Outputs |
| 54F257ALLDMQB |  157Kb/8P | Quad 2-Input Multiplexer with TRI-STATE Outputs |
| 54F257ALMQB |  157Kb/8P | Quad 2-Input Multiplexer with TRI-STATE Outputs |