The CD74AC253 and ACT253 dual 4-input multiplexers that utilize Advanced CMOS Logic technology. One of the four sources for each section is selected by the common Select inputs, S0 and S1. When the Output Enable (1OE or 2OE) is HIGH, the output is in the high-impedance state.
FAST™ is a Trademark of Fairchild Semiconductor.
| Technology family | ACT |
| Function | Digital Multiplexer |
| Configuration | 4 |
| Number of channels | 2 |
| Operating temperature range (°C) | -55 to 125 |
| Rating | Catalog |
| PDIP (N) | 16 | 181.42 mm² 19.3 x 9.4 |
| SOIC (D) | 16 | 59.4 mm² 9.9 x 6 |