| Technology Family | ALS |
| Function | Digital Multiplexer |
| Configuration | 4:1 |
| Number of channels (#) | 2 |
| Operating temperature range (C) | -55 to 125 |
| Rating | Military |
- 3-State Versions of the ′ALS153 and SN74AS153
- Permits Multiplexing From n Lines to
One Line - Performs Parallel-to-Serial Conversion
- Package Options Include Plastic Small-Outline (D) Packages, Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs
These data selectors/multiplexers contain inverters and drivers to supply full binary decoding data selection to the AND-OR gates. Separate output control inputs are provided for each of the two 4-line sections.
The 3-state outputs can interface with and drive data lines of bus-organized systems. With all but one of the common outputs disabled (at a high-impedance state), the low impedance of the single enabled output drives the bus line to a high or low logic level. Each output has its own output-enable (
) input. The output is disabled when is high.
The SN54ALS253 is characterized for operation over the full military temperature range of -55°C to 125°C. The SN74ALS253 and SN74AS253A are characterized for operation from 0°C to 70°C.
Select inputs A and B are common to both sections.