DM74ALS244AMSAX

Overview

The DM74ALS244AMSAX is an octal bus driver manufactured by Fairchild Semiconductor, belonging to the Advanced Low-Power Schottky (ALS) logic family. It features eight non-inverting buffers with three-state outputs housed in a 20-lead Small Outline Integrated Circuit (SOIC). The device operates within a supply voltage range of 4.5V to 5.5V and supports bidirectional data transmission controlled by direction inputs. Designed for memory and microprocessor systems, it provides high-speed switching with low power dissipation compared to standard Schottky TTL counterparts.

Feature Summary

• Octal configuration providing eight independent non-inverting buffer channels
• Three-state output capability allowing effective bus isolation when disabled
• Advanced Low-Power Schottky process ensuring improved switching performance
• Functional and pin compatibility with standard 74LS and Schottky logic families

Applications

• Memory address drivers in computer systems
• Clock signal distribution networks
• Bus-oriented transmitters and receivers
• Microprocessor system interface circuits

Procurement Notes

Verify the specific manufacturer marking on the component body against Fairchild or ON Semiconductor branding, as production rights transferred between entities. Confirm the package type matches the SOIC-20 specification and check for lead-free compliance markings if required by assembly standards. Ensure the part number suffix aligns with the requested tape-and-reel or tube packaging format.

Selection Notes

Select this component when designing systems requiring high-density octal buffering with low power consumption. It serves as a direct replacement for older 74S244 or 74LS244 devices where speed and power efficiency are critical. Consider the three-state control requirements for bus arbitration and ensure the operating temperature range meets the application's environmental constraints.

Part Context

This device is part of the broader DM74ALS series, which represents an evolution of the classic 7400-series logic family. The ALS technology was developed to offer a balance between the speed of Schottky TTL and the power efficiency of Low-Power Schottky. This specific model focuses on unidirectional data flow with tri-state control, distinguishing it from the bidirectional DM74ALS245 variant.

Replacement Considerations

Public confirmed substitute part numbers include DM74ALS244AM and DM74ALS244N.