SN74ALS158NSR

Overview

The SN74ALS158NSR is a quad 2-input data selector/multiplexer from Texas Instruments' Advanced Low-power Schottky (ALS) logic family. It features four independent multiplexing circuits, each selecting one of two data inputs based on address lines. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports surface-mount installation in a 16-pin SOIC package. Key electrical characteristics include a propagation delay of 14 ns, with low-level output current capability of 8 mA and high-level output current of -400 µA. It functions reliably across an operating temperature range of 0°C to +70°C.

Feature Summary

• Integrates four independent 2-to-1 multiplexing channels for parallel data routing
• Utilizes Advanced Low-power Schottky technology for enhanced speed and reduced power consumption
• Provides active-low outputs compatible with standard TTL logic interfaces

Applications

• Data routing in digital communication systems
• Address decoding and selection in microprocessor-based designs
• Signal switching in test and measurement equipment

Procurement Notes

Verify the specific suffix 'NSR' confirms the SOIC-16 package and reel packaging format. Ensure compatibility with 5V logic levels and confirm that the ALS series meets the thermal and electrical requirements of the target application environment before finalizing procurement.

Selection Notes

Select this component when multiple data sources require selective routing to a single destination using minimal control lines. The ALS series offers a balance of speed and power efficiency suitable for general-purpose digital logic applications requiring quad multiplexing functionality without complex configuration.

Part Context

This part belongs to the SN74ALS158 family of multiplexers. It serves as a surface-mount variant of the through-hole SN74ALS158N, providing equivalent logical functionality in a compact SOIC-16 footprint designed for automated assembly processes in modern electronic manufacturing.

Replacement Considerations

Direct pin-compatible alternatives may include other manufacturers' quad 2-to-1 multiplexers in the same logic family or package, provided they meet the 4.5V–5.5V supply and 14ns delay specifications.