74LCX244MSAX

Overview

The Fairchild Semiconductor 74LCX244MSAX is an octal buffer and line driver featuring non-inverting logic with three-state outputs. It operates within a supply voltage range of 2.3V to 3.6V, supporting low-voltage applications at 2.5V or 3.3V while maintaining compatibility with 5V signal environments through its 5V tolerant inputs and outputs. The device utilizes advanced CMOS technology to achieve high-speed operation with a maximum propagation delay of 6.5ns at VCC = 3.3V, alongside a maximum quiescent current of 10µA. It provides ±24mA output drive capability at 3.0V and incorporates patented noise reduction circuitry.

Feature Summary

• Features 5V tolerant inputs and outputs for seamless interfacing between low-voltage and 5V signal environments.
• Provides eight non-inverting buffers with three-state outputs suitable for bus-oriented transmission and memory address driving.
• Incorporates patented noise and EMI reduction circuitry to enhance signal integrity in high-speed applications.

Applications

• Memory address drivers
• Clock drivers
• Bus-oriented transmitters and receivers

Procurement Notes

Verify the specific suffix 'MSAX' against official Fairchild or onsemi documentation to confirm package type and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements if applicable to your manufacturing standards. Cross-reference the manufacturer part number with current distributor listings to confirm availability status and lead times, as legacy Fairchild products may have transitioned to onsemi distribution channels.

Selection Notes

Select this component when designing systems requiring octal buffering with high-speed performance and low power consumption. It is ideal for applications needing interface bridging between 2.5V/3.3V logic and 5V peripherals. Consider the 6.5ns propagation delay and ±24mA drive strength for timing-critical bus structures. Verify that the 5V tolerance feature aligns with the input/output voltage levels of connected devices to prevent damage during live insertion scenarios.

Part Context

The 74LCX244 belongs to the LCX family of low-voltage CMOS logic devices, designed to replace older TTL and LVC families in space-constrained, battery-powered applications. Manufactured by Fairchild Semiconductor (now part of onsemi), this series emphasizes high speed and low power dissipation. The MSAX suffix typically denotes a specific surface-mount package variant, such as SSOP or TSSOP, intended for automated assembly processes in consumer electronics and industrial control systems.

Replacement Considerations

Direct substitutes include the STMicroelectronics 74LCX244 and onsemi 74LCX244MTDX. Verify pinout compatibility and electrical characteristics such as propagation delay and output drive current before substitution. Check for any differences in package dimensions or moisture sensitivity levels if replacing the MSAX variant with other package types.