DM74AS244WMX

Overview

The DM74AS244WMX is an octal bus driver manufactured by Fairchild Semiconductor, belonging to the Advanced Schottky (AS) logic family. It features eight non-inverting buffers with three-state outputs organized into two groups of four, each controlled by a common enable gate. The device utilizes an advanced oxide-isolated, ion-implanted Schottky TTL process to achieve high switching performance with reduced power dissipation compared to standard Schottky counterparts. Designed for memory, microprocessor, and communication systems, it provides bidirectional or unidirectional buffer interfaces with low output impedance suitable for driving terminated transmission lines down to 133 ohms.

Feature Summary

• Advanced oxide-isolated, ion-implanted Schottky TTL process
• Improved switching performance with less power dissipation compared to Schottky counterpart
• Functional and pin compatible with 74LS and Schottky counterpart
• Switching response specified into 500Ω and 50 pF

Applications

• Memory system buffering
• Microprocessor interface circuits
• Communication systems data routing

Procurement Notes

Verify the specific suffix 'WMX' against official Fairchild documentation to confirm package type and tape-and-reel specifications. Ensure compatibility with existing PCB footprints for SOIC-20 packages. Cross-reference electrical parameters with current datasheets as legacy components may have updated testing conditions.

Selection Notes

Select this component when high-speed buffering with low power consumption is required in TTL-compatible environments. It serves as a direct replacement for standard Schottky drivers where improved speed-to-power ratio is necessary. Verify that the 500Ω and 50 pF switching specifications meet the target application's signal integrity requirements.

Part Context

This part belongs to the DM74AS series of Advance Schottky 3-STATE Bus circuits. These devices are designed to provide either bidirectional or unidirectional buffer interfaces. The family includes both inverting (DM74AS240) and non-inverting (DM74AS244) options, all sharing similar packaging and functional characteristics within the 20-pin configuration.

Replacement Considerations

The DM74ALS244 and DM74S244 are functionally and pin-compatible alternatives within the same logic family hierarchy.