DM74AS257SJX

Overview

The DM74AS257SJX is a quad 2-to-1 data selector and multiplexer manufactured by onsemi, belonging to the Advanced Schottky (AS) logic series. It features four independent circuits with three-state outputs, allowing direct interface with bus-oriented systems. The device operates within a supply voltage range of 4.5 V to 5.5 V and exhibits a propagation delay of 12 ns at these voltages. Designed for surface-mount applications, it is housed in a 16-SOIC package and supports an operating temperature range from 0°C to +70°C.

Feature Summary

• Quad 2-to-1 data selection capability with common select inputs
• Three-state outputs enabling high-impedance bus interfacing
• Advanced Schottky technology for high-speed operation

Applications

• Bus-oriented system data routing
• High-speed digital signal selection
• Multiplexing in industrial control environments

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels due to potential availability constraints. Confirm RoHS compliance status and specific packaging variants prior to procurement. Ensure storage conditions meet moisture sensitivity level requirements to maintain device integrity during assembly processes.

Selection Notes

Select this component for designs requiring fast switching speeds and low power consumption typical of AS logic families. Ensure the application environment remains within the specified 0°C to +70°C temperature range. Verify that the 4.5 V to 5.5 V supply voltage aligns with the system power architecture before integration.

Part Context

This part belongs to the 74AS257 family of multiplexers, widely used in legacy and modern digital systems for data routing. The Advanced Schottky series offers improved speed over standard TTL while maintaining compatibility. The SOIC package facilitates automated surface-mount assembly in compact electronic designs.

Replacement Considerations

SN74AS257D is a parameter-equivalent substitute available from Texas Instruments.