DM74ALS540ASJX

Overview

The DM74ALS540ASJX is an octal buffer and line driver manufactured by Fairchild Semiconductor. It features eight 3-state outputs with inverted logic. The device operates within a supply voltage range of 4.5V to 5.5V. It utilizes a 20-pin Small Outline Package (SOP) compatible with JEDEC MS-012 standards. The component belongs to the Advanced Low-power Schottky (ALS) logic family, designed for high-speed digital applications requiring low power consumption.

Feature Summary

• Provides octal buffering with three-state output capability
• Inverts input signals for line driving applications
• Utilizes Advanced Low-power Schottky technology for speed and efficiency

Applications

• Memory mapping control circuits
• Clock drivers
• Bus-oriented transmissions

Procurement Notes

Verify the specific suffix 'SJX' against the manufacturer's current datasheet to confirm package dimensions and pinout compatibility. Ensure the sourcing channel provides documentation confirming the ALS series specifications and RoHS compliance status as indicated in the part description.

Selection Notes

Select this component when an octal buffer with inverted outputs and 3-state control is required. It serves as a direct replacement for standard LS540 devices where lower power dissipation and faster switching speeds are necessary. Confirm that the system voltage aligns with the 5V TTL logic levels supported by the ALS family.

Part Context

This part is part of the DM74ALS series, which represents Fairchild's implementation of Advanced Low-power Schottky logic. The series offers improved performance over standard LS logic while maintaining pin compatibility. The SOP-20 package allows for surface-mount integration in compact electronic designs.

Replacement Considerations

The DM74ALS540AN or DM74ALS540N may serve as functional equivalents in DIP packages. Verify electrical characteristics and package type differences before substitution.