DM74157N

Overview

The DM74157N is a quad 2-line to 1-line data selector/multiplexer manufactured by Fairchild Semiconductor. It contains four independent multiplexer circuits, allowing the selection of one of two data inputs for each of the four outputs based on a common select input. The device operates with a single supply voltage ranging from 4.75V to 5.25V. Electrical characteristics include an output high current of 800µA and an output low current of 16mA. It is housed in a 16-pin PDIP package and is designed for TTL logic applications.

Feature Summary

• Contains four independent 2-to-1 multiplexer circuits for parallel data selection
• Features a common select input to control all four channels simultaneously
• Provides true outputs with full on-chip data selection capability

Applications

• Data routing in digital systems
• Signal switching applications
• Logic circuit design requiring multiple 2:1 selection functions

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm package integrity and pin configuration upon receipt. Check for obsolescence status as this part may be discontinued. Ensure storage conditions meet semiconductor handling standards to prevent damage.

Selection Notes

Select this component when four independent 2:1 multiplexing functions are required within a single package. Consider the 16-pin DIP form factor for through-hole mounting requirements. Evaluate compatibility with existing TTL logic levels and power supply constraints before integration into the design.

Part Context

This component belongs to the 74 series of logic integrated circuits, specifically the standard 74 family. It serves as a signal switch and multiplexer solution for digital electronics. The device is part of Fairchild's historical portfolio of logic components, now managed under ON Semiconductor following acquisition activities.

Replacement Considerations

Check for equivalent parts such as DM74LS157N or DM74S157N for potential functional substitutes. Verify pin compatibility and electrical specifications before substitution. Note that the DM74157N is listed as obsolete; consult official documentation for approved replacement recommendations.