DM74ALS240AWM

Overview

The DM74ALS240AWM is an octal 3-STATE bus driver manufactured by Fairchild Semiconductor. It belongs to the Advanced Low-power Schottky (ALS) logic family and features eight inverting buffers with common 3-STATE control. The device operates within a supply voltage range of 4.5V to 5.5V and utilizes a 20-pin SOIC surface-mount package.

Feature Summary

• Advanced oxide-isolated, ion-implanted Schottky TTL process for improved switching performance
• Bidirectional or unidirectional buffer interface capability for memory and microprocessor systems
• Low output impedance suitable for driving terminated transmission lines
• High input impedance to minimize loading on transmission lines

Applications

• Memory system interfaces
• Microprocessor system data buses
• Communication systems requiring bidirectional buffering

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status and specific manufacturing date codes against current inventory records. Ensure the SOIC-20 package dimensions match design requirements before final procurement integration.

Selection Notes

Select this component when low power dissipation and high-speed switching are required compared to standard Schottky counterparts. Verify compatibility with existing 74LS logic levels if interfacing with legacy systems. Ensure the 3-STATE enable functionality aligns with the system's bus isolation requirements.

Part Context

This part is part of the DM74ALS240/241A series of Octal 3-STATE Bus Drivers/Receivers. It shares functional similarities with other ALS family members but is distinct from the AS series which offers higher speed at the cost of increased power consumption. The device is designed for general-purpose digital logic applications.

Replacement Considerations

SN74ALS240A-1N from Texas Instruments is a documented parameter-equivalent substitute.