DM74ALS258MX

Overview

The DM74ALS258MX is an octal bus transceiver belonging to the Advanced Low-power Schottky (ALS) logic family, manufactured by Fairchild Semiconductor. It features a 20-pin Small Outline Integrated Circuit (SOIC) package with a 0.300-inch width. The device operates as a bidirectional data bus transceiver with direction control, designed for use in memory and microprocessor systems. It supports TTL logic levels and provides three-state outputs for efficient bus interfacing.

Feature Summary

• Advanced low-power Schottky technology ensures high-speed operation with reduced power consumption compared to standard TTL devices.
• Bidirectional data transmission capability controlled by a dedicated direction input pin for flexible bus architecture integration.
• Three-state output design allows multiple transceivers to share a common bus without signal interference.

Applications

• Memory interface circuits in computer systems
• Microprocessor system data buses
• Asynchronous bidirectional data communication links

Procurement Notes

Verify the component authenticity by checking the manufacturer marking against Fairchild Semiconductor specifications. Confirm the package type matches the SOIC-20 outline and ensure the device meets the required ALS series electrical characteristics. Cross-reference the date code and lot number with official distributor records to guarantee supply chain integrity and compliance with RoHS standards if applicable.

Selection Notes

Select this component when designing systems requiring high-speed, low-power octal bus transceivers. It is suitable for applications needing bidirectional data flow control within TTL-compatible environments. Consider the SOIC-20 package constraints for PCB layout and thermal management. Ensure voltage supply ranges align with the specific ALS series operational requirements for reliable performance.

Part Context

This part belongs to the DM74ALS series of logic integrated circuits, which are known for their improved speed and power efficiency over earlier LS and S families. The DM74ALS258MX specifically functions as an octal bus transceiver, providing a robust solution for managing data paths in complex digital systems where multiple devices communicate over shared lines.

Replacement Considerations

Check for direct pin-to-pin replacements within the same ALS family or compatible 74-series variants from other manufacturers. Verify that any substitute maintains the same logical function, voltage levels, and package dimensions to ensure seamless integration into existing designs without circuit modification.