74LCX244WMX

Overview

The Fairchild Semiconductor 74LCX244WMX is an octal buffer and line driver featuring non-inverting logic with three-state outputs. It operates within a supply voltage range of 2.0 V to 3.6 V, utilizing advanced CMOS technology for high-speed performance and low power dissipation. The device provides 5V tolerant inputs and outputs, enabling direct interfacing with 5V signal environments while powered by lower voltages. Key electrical parameters include a maximum propagation delay of 7.5 ns at 2.7 V and 6.5 ns at 3.3 V, with output drive capabilities of ±24 mA. It supports live insertion and withdrawal, ensuring system integrity during hot-swap operations.

Feature Summary

• Features five-volt tolerant inputs and outputs for seamless interface with legacy 5V systems
• Supports live insertion and withdrawal without causing system disruption
• Implements patented noise and EMI reduction circuitry for signal integrity
• Provides high-impedance power-down state to minimize current consumption

Applications

• Memory address drivers in embedded systems
• Clock distribution networks requiring low skew
• Bus-oriented transmitter and receiver interfaces

Procurement Notes

Verify the specific suffix 'WMX' against the manufacturer's official datasheet to confirm package type and tape/reel specifications. Ensure compatibility with RoHS directives if required by your assembly process. Cross-reference the part number with onsemi documentation, as Fairchild Semiconductor's logic portfolio was acquired. Confirm moisture sensitivity level handling requirements prior to soldering.

Selection Notes

Select this component when designing low-voltage (2.5V or 3.3V) systems that require driving 5V loads or communicating with 5V peripherals. The 74LCX244 is suitable for applications demanding high-speed data transfer with minimal power consumption. Consider the SOIC-20 package constraints for PCB layout. Evaluate the ±24 mA drive strength against the capacitive load of the destination bus to ensure signal rise and fall times meet timing requirements.

Part Context

The 74LCX244 belongs to the LCX family of low-voltage CMOS logic devices. This series is designed to bridge the gap between older 5V TTL/CMOS standards and modern low-voltage digital circuits. The WMX suffix typically denotes a specific tape-and-reel packaging configuration for surface-mount assembly, distinguishing it from bulk or tube packages like the MTC variant.

Replacement Considerations

Direct pin-compatible substitutes include the ON Semiconductor 74LCX244WMX and the Fairchild 74LCX244MTCX. Other manufacturers such as STMicroelectronics offer equivalent 74LCX244 parts. Verify that any replacement maintains the same 5V tolerance and propagation delay characteristics.