DM74AS240WMX

Overview

The DM74AS240WMX is an octal 3-STATE bus driver manufactured by Fairchild Semiconductor. It utilizes the Advanced Schottky (AS) logic series and is housed in a 20-pin SOIC package. The device contains eight non-inverting buffers organized with four buffers sharing a common 3-STATE enable gate, allowing for unidirectional data transmission. It is designed to interface with memory, microprocessor, and communication systems.

Feature Summary

• Advanced oxide-isolated, ion-implanted Schottky TTL process
• Low output impedance suitable for driving terminated transmission lines
• High input impedance to minimize loading on transmission lines
• Functional and pin compatible with 74LS and standard Schottky counterparts

Applications

• Memory system interfaces
• Microprocessor system buses
• Communication system buffering

Procurement Notes

Verify the specific manufacturer source, as Fairchild Semiconductor's logic division was acquired by onsemi. Confirm that the component meets current RoHS environmental standards and check for moisture sensitivity level requirements during storage and handling before integration into production assemblies.

Selection Notes

Select this component when high-speed unidirectional buffering is required for AS-series logic applications. Ensure the design accommodates its specified switching response characteristics into standard loads. Verify compatibility with existing CMOS interface voltage levels if used in mixed-logic environments.

Part Context

This part belongs to the DM74AS family of Advanced Schottky logic devices. It serves as a high-performance buffer alternative to older Schottky TTL technologies, offering improved switching speeds while maintaining lower power dissipation. The 'WMX' suffix indicates the surface-mount SOIC package variant.

Replacement Considerations

The DM74AS240N is a documented pin-compatible leaded DIP substitute within the same product family.