DM74ALS240ASJ

Overview

The DM74ALS240ASJ is an octal 3-STATE bus driver manufactured by Fairchild Semiconductor. It belongs to the Advanced Low-power Schottky (ALS) logic series and utilizes a TTL-compatible input structure. The device features eight independent buffers with common 3-STATE control, organized in a 20-pin Small Outline Integrated Circuit (SOIC) package adhering to the MS-013 standard. It operates within a specified temperature range up to 70 °C.

Feature Summary

• Advanced oxide-isolated, ion-implanted Schottky process for improved switching performance
• Bidirectional or unidirectional buffer interface capability with common 3-STATE enable gate
• Functional and pin compatible with 74LS and Schottky counterparts

Applications

• Memory systems
• Microprocessor systems
• Communication systems

Procurement Notes

Verify the manufacturer origin, as Fairchild Semiconductor's logic assets were acquired by ON Semiconductor. Confirm the specific suffix 'ASJ' corresponds to the SOIC-20 package variant. Ensure the component meets current environmental compliance standards required for the intended application.

Selection Notes

Select this component when bidirectional data transfer is required between buses with high impedance isolation needs. It serves as a direct replacement for older 74LS240 designs where lower power consumption and faster switching speeds are necessary without changing the footprint.

Part Context

This part is part of the DM74ALS family, designed to offer improved AC performance over LS counterparts while maintaining low power dissipation. It provides a robust solution for driving terminated transmission lines and interfacing with CMOS logic levels in digital circuit architectures.

Replacement Considerations

The DM74ALS240N is a PDIP equivalent. The DM74ALS245A is a transceiver variant with direction control. Verify pin compatibility before substituting with other ALS series drivers.