The SN74ALS158 from Texas Instruments is a high-performance, quadruple 1-line to 1-line data selectors/multiplexers that provides the functionality of four individual 2-input multiplexers in a single 16-pin package. This integrated circuit is designed for multiplexing and data routing applications within digital systems, where it is essential to control the flow of data from multiple sources to a single destination.

Each multiplexer in the SN74ALS158 has two binary control inputs, labeled A and B, and an active-low enable input, which is common to all four units. When the enable input is low, the selected data from one of the two input lines is passed to the output. This selection is based on the values of the A and B inputs, allowing for precise control over which input is routed through to the output at any given time.

The SN74ALS158 is characterized for operation from 0°C to 70°C, making it suitable for commercial-grade applications. The device features a typical power dissipation of 1 mW per gate and a maximum propagation delay time of 11 ns, ensuring efficient and fast operation suitable for high-speed digital systems.

The device is fabricated with Texas Instruments' Advanced Low-Power Schottky (ALS) technology, which combines low power consumption with high-speed operation. This makes the SN74ALS158 an excellent choice for interfacing with other ALS and AS family members, as well as with the TTL family, due to its compatibility in terms of logic levels and power dissipation.

The SN74ALS158 comes in a standard DIP (Dual In-line Package) or SOIC (Small Outline Integrated Circuit) package, providing flexibility for both through-hole and surface-mount technology (SMT) applications. Its robust design ensures reliable operation in a wide range of digital applications, including data transmission, signal gating, and control system logic.

In summary, the SN74ALS158 from Texas Instruments is a versatile and reliable component for designers looking to optimize the performance of their digital systems with efficient data selection and routing capabilities.