DM74AS258M

Overview

The DM74AS258M is a 3-STATE Quad 1-of-2-line Data Selector/Multiplexer manufactured by Fairchild Semiconductor. It features four independent multiplexers, each selecting one of two data inputs to drive a common 3-state output. The device includes inverters and drivers for full on-chip data selection. It operates with a supply voltage range typical for AS logic series and utilizes a 16-Lead Small Outline Integrated Circuit (SOIC) package.

Feature Summary

• Provides four independent 1-of-2 line data selection paths
• Outputs feature 3-state capability for bus driving applications
• Integrates internal inverters and drivers for direct interface

Applications

• Asynchronous bidirectional data buses
• Microprocessor systems requiring data routing
• Memory address/data selection circuits

Procurement Notes

Verify the component status as the source indicates this part may be discontinued by Fairchild Semiconductor. Confirm the manufacturer's current production status and availability through authorized distributors before procurement planning. Ensure the 16-SOIC package dimensions match the design requirements.

Selection Notes

Select this component for applications requiring quad 1-of-2 multiplexing with high-speed AS logic performance. Consider the 3-state output control for bus isolation needs. Verify that the SOIC-16 package fits the PCB layout constraints. Check if the specific voltage levels and drive currents meet the system interface specifications.

Part Context

This component belongs to the 74AS logic family, known for advanced low-power Schottky characteristics. It serves as a data selector within digital logic circuits, allowing multiple sources to share a single output line under controlled conditions. The 'M' suffix typically denotes the SOIC package variant.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. As the source indicates potential discontinuation, consult the manufacturer or distributor for current equivalent recommendations or obsolescence notices.