DM74ALS158N

Overview

The DM74ALS158N is a Quad 1-of-2 Line Data Selector/Multiplexer from the ALS series, manufactured by Fairchild Semiconductor. It features four independent multiplexers, each selecting one of two data inputs based on a common select line. The device utilizes TTL logic levels and provides inverted outputs. It is housed in a 16-lead Plastic Dual-In-Line (PDIP) package with a 0.300-inch width, compliant with JEDEC MS-001 standards. The component operates within a standard temperature range and is lead-free.

Feature Summary

• Integrates four independent 1-of-2 data selectors within a single package
• Utilizes Advanced Low-Power Schottky (ALS) technology for improved performance
• Provides inverted output signals for each selected data channel
• Compatible with standard TTL logic input voltage levels

Applications

• Data routing in digital communication systems
• Address decoding circuits
• Parallel-to-serial conversion interfaces
• Signal selection in microprocessor-based systems

Procurement Notes

Verify the manufacturer origin, as Rochester Electronics may supply this part number sourced from original manufacturers. Confirm the package type is PDIP-16 and check for lead-free compliance status. Ensure the specific revision matches system requirements. Cross-reference with Fairchild Semiconductor documentation for accurate electrical specifications and pin configurations before integration.

Selection Notes

Select this component when a compact solution for multiple 2-to-1 data paths is required. The ALS series offers a balance of speed and power consumption suitable for general-purpose digital logic. Consider the PDIP-16 package for through-hole mounting needs. Verify that the inverted output polarity aligns with downstream circuit design requirements without additional inversion stages.

Part Context

This component belongs to the 74ALS logic family, known for enhanced switching speeds compared to standard LS logic while maintaining lower power dissipation. The DM74ALS158N specifically addresses applications requiring multiple independent data selection channels. It serves as a fundamental building block for complex digital signal processing and control logic architectures.

Replacement Considerations

Equivalent parts include the DM74AS158N, which shares similar functionality but may differ in specific AC parameters due to AS versus ALS technology variations. Verify pin compatibility and electrical characteristics before substitution.