DM74AS157N

Overview

The DM74AS157N is a Quad 1 of 2 Line Data Selector/Multiplexer manufactured by Fairchild Semiconductor. It contains inverters and drivers to supply full on-chip data selection to four output gates. The device features buffered inputs and outputs, ensuring signal integrity across the four-bit word selection from one of two sources. A separate strobe input is provided for control. This component belongs to the AS logic family, offering high-speed performance suitable for digital data routing applications.

Feature Summary

• Provides quad 2-line to 1-line data selection capabilities
• Includes buffered inputs and outputs for improved signal handling
• Features a separate strobe input for precise control timing

Applications

• Digital data routing systems
• Multiplexing circuits in communication equipment
• Data selector modules in industrial control panels

Procurement Notes

Verify the manufacturer datasheet for detailed specifications before procurement. Confirm the package type matches your PCB layout requirements. Ensure compatibility with your system's voltage levels and logic families. Check for any specific ordering suffixes that may indicate different packaging or temperature ranges. Validate authenticity through authorized channels.

Selection Notes

Select this component when quad multiplexing functionality is required with buffered I/O. Consider the AS logic family speed characteristics against system timing constraints. Evaluate the 16-pin DIP package suitability for your assembly process. Compare power dissipation requirements with available thermal management options. Ensure the strobe input logic aligns with your control signals.

Part Context

This part is part of the 74xx series logic family, specifically designed for data selection tasks. It serves as a fundamental building block in digital electronics for routing multiple data lines to a single output path. The DM74AS157N variant offers enhanced speed compared to standard LS series counterparts while maintaining compatible pinouts.

Replacement Considerations

The DM74LS157 is a documented substitute within the same functional category. Verify electrical characteristics and speed parameters match your application needs before substitution. Ensure package compatibility if physical replacement is required.