SN74LS157NS

Overview

The SN74LS157NS is a quadruple 2-input multiplexer manufactured by Texas Instruments. It belongs to the 74LS logic family, utilizing Low-Power Schottky technology for high-speed operation and low power dissipation. The device features four independent data selectors with common select and enable inputs. It accepts two sources of four bits of data each and selects one source based on the select input. The outputs present selected data in non-inverting form. The NS suffix indicates a plastic small-outline package.

Feature Summary

• Quad 2-input multiplexing capability
• Common select and enable inputs
• Non-inverting buffered outputs
• Glitch-free multiplexing circuitry

Applications

• Data routing in digital systems
• Function generation using two variables
• Parallel-to-serial conversion interfaces
• Address decoding applications

Procurement Notes

Verify the manufacturer marking matches Texas Instruments specifications. Confirm the package type corresponds to the NS designation. Check RoHS compliance status against current datasheets. Ensure the logic family matches LS requirements for voltage and speed compatibility.

Selection Notes

Select this component when quadruple 2-to-1 multiplexing is required within standard TTL voltage ranges. Consider the LS series for balanced speed and power consumption. Verify package availability matches board layout constraints. Compare propagation delays against system timing requirements.

Part Context

This part is part of the 74LS157 family of data selectors. It serves as a fundamental building block for digital signal routing. The device is compatible with other members of the 74LS logic family. It provides a standard solution for multi-channel data selection tasks.

Replacement Considerations

Compatible substitutes include SN74LS157D from Texas Instruments and MC74LS157 from ON Semiconductor. Verify pinout compatibility before substitution. Ensure electrical characteristics meet original design specifications.