These data selectors/multiplexers contain inverters and drivers to supply full data selection to the four output gates. A separate strobe (G) input is provided. A 4-bit word is selected from one of two sources and is routed to the four outputs. The ´ALS157A and SN74AS157 present true data. The ´ALS158 and SN74AS158 present inverted data to minimize propagation delay time.
The SN54ALS157A and SN54ALS158 are characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS157A, SN74ALS158, SN74AS157, and SN74AS158 are characterized for operation from 0°C to 70°C.
| Technology family | ALS |
| Function | Digital Multiplexer |
| Configuration | 2 |
| Number of channels | 4 |
| Operating temperature range (°C) | -55 to 125 |
| Rating | Military |
| CDIP (J) | 16 | 135.3552 mm² 19.56 x 6.92 |
| LCCC (FK) | 20 | 79.0321 mm² 8.89 x 8.89 |
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