DM74ALS244AN

Overview

The DM74ALS244AN is an octal buffer and line driver manufactured by Fairchild Semiconductor. It features eight non-inverting buffers organized into two groups of four, each with a common three-state output enable. The device utilizes the Advanced Low-Power Schottky (ALS) logic family, providing high-speed operation with low power dissipation. It is housed in a 20-pin plastic dual in-line package (PDIP). The component operates within a supply voltage range of 4.5V to 5.5V and supports a wide operating temperature range from 0°C to 70°C.

Feature Summary

• Provides eight non-inverting buffers with independent three-state control for two groups of four outputs
• Utilizes Advanced Low-Power Schottky technology to achieve high switching speeds while maintaining low power consumption
• Designed to drive terminated transmission lines directly due to low output impedance characteristics

Applications

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

Procurement Notes

Verify the specific manufacturer origin, as Fairchild Semiconductor's logic division was acquired by onsemi. Confirm that the part number corresponds to the original Fairchild production run if historical consistency is required. Check RoHS compliance status against the manufacturing date code, as older stock may not meet current environmental standards. Ensure the package type matches the required PCB footprint.

Selection Notes

Select this component when designing systems requiring high-speed data buffering with minimal power impact. The ALS series offers a balance between the speed of standard Schottky logic and the power efficiency of LS logic. Consider the three-state capability for bus sharing applications. Verify that the input/output voltage levels are compatible with the rest of the system logic family.

Part Context

This component belongs to the 74ALS logic family, which succeeded the standard 74LS series. The 'DM' prefix typically denotes a commercial grade or specific packaging variant within the Fairchild product line. The 244 designation specifically refers to an octal buffer configuration with three-state outputs, distinguishing it from other logic functions like inverters or gates.

Replacement Considerations

SN74ALS244AN from Texas Instruments is a parameter-equivalent replacement.