DM74ALS257MX

Overview

The DM74ALS257MX is a quad 2-line to 1-line multiplexer from the ALS series, manufactured by Fairchild Semiconductor. It features true outputs and is housed in a 16-pin PDSO package (SOIC-16) with a 0.150-inch width. The device operates within 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 contains four independent multiplexing circuits, each selecting one of two inputs based on control signals.

Feature Summary

• Contains four independent 2-to-1 data selectors
• Provides true output logic levels
• Supports bidirectional data flow via address selection

Applications

• Data routing in microprocessor systems
• Signal selection in memory interfaces
• Address decoding applications

Procurement Notes

Verify component authenticity through official manufacturer channels or authorized distributors. Confirm lot codes and date codes against current production status. Ensure packaging integrity matches SOIC-16 specifications. Check for RoHS compliance documentation if required by regulatory standards. Validate pinout alignment with MS-012 mechanical drawings before integration.

Selection Notes

Select this component when requiring multiple independent 2-to-1 multiplexing functions in a single package. Consider the ALS series characteristics for low power consumption and high-speed operation compared to standard TTL. Verify that the 3-state output capability meets system bus isolation requirements. Ensure voltage levels are compatible with 5V logic families.

Part Context

This part belongs to the DM74ALS family of advanced low-power Schottky logic devices. It serves as a digital selector/multiplexer variant within the broader 74-series logic ecosystem. The MX suffix indicates surface-mount packaging suitable for automated assembly processes.

Replacement Considerations

Check for direct equivalents such as DM74ALS257M or other 74ALS257 variants from different manufacturers. Verify pin compatibility and electrical specifications before substitution.