DM74ALS645AWMX

Overview

The DM74ALS645AWMX is an octal bus transceiver from the Advanced Low-power Schottky (ALS) series, manufactured by Fairchild Semiconductor. It features a single function with eight bits and true output polarity. The device utilizes a 20-pin Small Outline Integrated Circuit (SOIC) package, specifically MS-013 with a 0.300-inch width. It operates as a bidirectional transceiver with common control direction inputs. The maximum output low current is specified at 0.024 A. The component is RoHS compliant and carries a moisture sensitivity level of 1.

Feature Summary

• Advanced oxide-isolated ALS technology for improved performance
• Bidirectional data transmission controlled by direction input
• High-impedance isolation via enable input

Applications

• Memory systems
• Microprocessor systems
• Asynchronous bidirectional data buses

Procurement Notes

Verify the specific manufacturer source, as Fairchild's logic division was acquired by ON Semiconductor. Confirm that the 'W' suffix denotes the SOIC-20 package and 'MX' indicates tape-and-reel packaging if applicable to your supply chain requirements. Ensure the component matches the original Fairchild datasheet specifications rather than generic equivalents.

Selection Notes

Select this component when designing systems requiring high-speed, low-power octal data transfer between buses. It is suitable for applications needing non-inverting logic with three-state outputs. Consider the SOIC-20 footprint constraints and the specific voltage requirements of the ALS family during integration.

Part Context

This part belongs to the DM74ALS245/645 family of octal bus transceivers. While similar to the DM74ALS245AWMX in pinout and functionality, the 645 variant typically implies specific internal configuration or manufacturing lot variations within the ALS product line. It shares the same physical dimensions and electrical characteristics as other devices in this advanced Schottky series.

Replacement Considerations

The DM74ALS245AWMX is a functional equivalent within the same package and logic family. Other compatible parts include the DM74ALS645AWM and DM74ALS645AWMX_NL.