DM74ALS244ASJ

Overview

The DM74ALS244ASJ is an octal buffer and line driver manufactured by Fairchild Semiconductor. It belongs to the Advanced Low-Power Schottky (ALS) logic family, designed for high-speed digital applications requiring low power consumption. The device features eight non-inverting buffers with three-state outputs, allowing multiple drivers to share a common bus without interference. It operates within a standard voltage range of 4.5V to 5.5V and is housed in a 20-lead small outline package.

Feature Summary

• Advanced Low-Power Schottky technology ensures high switching speed while maintaining reduced power dissipation compared to standard TTL devices.
• Three-state outputs provide effective bus isolation, enabling connection to shared data lines without signal contention.
• Non-inverting configuration preserves input signal polarity, suitable for direct buffering of address and data buses.

Applications

• Memory mapping systems
• Clock drivers
• Bus-oriented transmissions

Procurement Notes

Verify the specific suffix 'ASJ' against official datasheets to confirm package type and temperature rating. Ensure compatibility with existing board layouts regarding pin assignments and thermal requirements. Confirm availability status as older ALS series components may have limited supply chains or require cross-referencing with current manufacturers.

Selection Notes

Select this component when designing systems that require high-speed data buffering with minimal power impact. It serves as a drop-in replacement for standard 74LS244 designs where performance improvements are needed. Consider the package constraints and ensure the design supports the required drive capabilities for the connected transmission lines.

Part Context

This part is part of the broader 74ALS logic family, which bridges the gap between standard LS and faster AS technologies. It is commonly used in legacy industrial and computing equipment. The manufacturer has transitioned through acquisitions, so documentation may reference onsemi or Fairchild Semiconductor interchangeably depending on the production era.

Replacement Considerations

Direct pin-compatible substitutes include the SN74ALS244 from Texas Instruments. Verify electrical characteristics and package dimensions before substitution to ensure seamless integration into existing hardware designs.