DM74ALS258M

Overview

The DM74ALS258M is a quad multiplexer/demultiplexer from the Advanced Low-power Schottky (ALS) logic family, manufactured by Fairchild Semiconductor. It features four independent 1-of-4 data selectors configured as multiplexers or demultiplexers within a single 16-pin Small Outline Integrated Circuit (SOIC) package. The device operates with a supply voltage range of 4.5 V to 5.5 V and supports an operating temperature range from 0°C to +70°C. It provides true outputs and includes three address inputs for channel selection.

Feature Summary

• Contains four independent 1-of-4 multiplexer circuits capable of functioning as either multiplexers or demultiplexers.
• Utilizes Advanced Low-power Schottky technology to ensure high-speed switching performance while maintaining low power consumption.
• Features true outputs that provide non-inverted signal transmission for each selected data channel.

Applications

• Data routing in microprocessor-based systems
• Signal selection in digital communication interfaces
• Address decoding and bus arbitration

Procurement Notes

Verify the manufacturer origin, as this component was originally produced by Fairchild Semiconductor and may now be distributed by onsemi following corporate restructuring. Confirm the specific suffix 'M' corresponds to the SOIC-16 surface-mount package. Ensure compliance with current RoHS directives if required for the application. Check for availability of original Fairchild markings versus updated branding.

Selection Notes

Select this component when a design requires multiple independent 1-of-4 data paths within a compact footprint. The ALS series offers a balance of speed and power dissipation suitable for general-purpose digital logic. Consider the 16-pin SOIC package constraints for PCB layout. Verify that the 4.5 V to 5.5 V operating voltage aligns with the system's power supply rails.

Part Context

The DM74ALS258M belongs to the extensive 74ALS logic family, known for improved performance over standard LS TTL. As a multiplexer, it allows multiple input signals to be routed to a single output line based on control signals. This specific part integrates four such channels, reducing the component count compared to using discrete gates. It serves as a fundamental building block for complex digital data handling tasks.

Replacement Considerations

Check for equivalents such as the DM74ALS258MX or other manufacturers' 74ALS258 variants. Verify pin compatibility and electrical specifications before substitution. Note that sourcing may require checking both Fairchild legacy stock and current onsemi inventory.