SN74LS158N

Overview

The SN74LS158N is a quad 2-line to 1-line data selector/multiplexer from Texas Instruments, part of the LS logic family. It features a 16-pin PDIP package and operates with a supply voltage range of 4.75V to 5.25V. The device contains four independent multiplexers, each selecting one of two data inputs based on a common select line. It provides active-low outputs and includes an active-low enable input for all channels.

Feature Summary

• Integrates four independent 2-to-1 multiplexers within a single package
• Features active-low outputs for direct interfacing with TTL logic
• Includes a common active-low enable input to control all channels simultaneously

Applications

• Data routing in digital systems
• Address decoding circuits
• Signal selection in measurement equipment

Procurement Notes

Verify the specific suffix 'N' confirms the 16-pin PDIP package type. Confirm the LS logic family designation matches system voltage requirements of 4.75V to 5.25V. Check for RoHS compliance status if required by assembly standards. Ensure the manufacturer is Texas Instruments or an authorized licensee to guarantee specification adherence.

Selection Notes

Select this component when four independent 2-input multiplexing functions are required in a through-hole design. The LS family offers standard speed suitable for general-purpose digital applications. Consider pin compatibility with other 74xx series devices if upgrading existing designs. Verify power supply constraints align with the specified operating voltage range before integration.

Part Context

This component belongs to the widely used 74xx series of logic integrated circuits. The SN74LS158 specifically implements multiplexer functionality using Low-power Schottky technology. It serves as a fundamental building block for data path management in digital electronics, offering a compact solution for signal switching tasks compared to discrete transistor implementations.

Replacement Considerations

Compatible substitutes include the SN74S158 for higher speed requirements and the SN74HC158 for CMOS compatibility. Verify pinout consistency across these alternatives to ensure direct replacement without circuit modification.