DM74ALS258N

Overview

The DM74ALS258N is a 3-STATE Quad 1-of-2-Line Data Selector/Multiplexer manufactured by Fairchild Semiconductor. It belongs to the ALS (Advanced Low-power Schottky) logic series and features inverted outputs. The device is housed in a 16-pin PDIP package with lead-free construction compliant with MS-001 standards. It supports TTL input levels and is designed for high-speed data routing applications.

Feature Summary

• Provides four independent 2-to-1 multiplexing channels
• Features 3-state output capability for bus isolation
• Utilizes Advanced Low-power Schottky technology for speed and efficiency

Applications

• Data selector circuits
• Multiplexing systems
• Bus interface designs

Procurement Notes

Verify component status as this part may be obsolete or discontinued by Fairchild Semiconductor. Confirm availability through authorized distributors or onsemi, the successor entity. Ensure the 16-PDIP package matches your PCB footprint requirements. Check for lead-free compliance if environmental regulations apply to your assembly process.

Selection Notes

Select this component when four independent 2:1 signal selection paths are required within a single package. The ALS series offers a balance of switching speed and power consumption suitable for general-purpose digital logic. Ensure system voltage levels align with TTL input specifications and that 3-state outputs are necessary for the intended bus topology.

Part Context

This device is part of the DM74ALS family of logic integrated circuits. It shares the ALS technology platform with other components like the DM74ALS257, differing primarily in internal configuration. The N suffix denotes the plastic dual-in-line package variant. Fairchild Semiconductor was the original manufacturer, with production rights later transferred to onsemi.

Replacement Considerations

Check for equivalents from onsemi, which acquired Fairchild's logic business. Verify pin compatibility and electrical characteristics against alternative quad multiplexers in the 74ALS series. Ensure any substitute maintains the 3-state output functionality and 16-pin DIP form factor.