MC74LCX244DW

Overview

The MC74LCX244DW is a low-voltage CMOS octal buffer and line driver featuring non-inverting logic with three-state outputs. It operates within a supply voltage range of 1.65V to 3.6V, providing compatibility with 5V signal environments through 5V-tolerant inputs and outputs. The device utilizes advanced CMOS technology to achieve high-speed operation while maintaining low power dissipation. Key electrical characteristics include a maximum propagation delay of 6.5ns at 3.3V and a maximum quiescent current of 10µA. It supports an output drive current of ±24mA and offers robust electrostatic discharge protection exceeding 2000V via the human body model.

Feature Summary

• Provides eight non-inverting buffers with three-state outputs for bus-oriented transmission and memory address driving.
• Features 5V-tolerant inputs and outputs, enabling safe interfacing between low-voltage devices and 5V signal environments.
• Supports live insertion and withdrawal capabilities due to power-down high-impedance input and output states.
• Implements patented noise and EMI reduction circuitry to enhance signal integrity during high-speed operation.

Applications

• Memory address drivers in low-voltage systems
• Clock distribution networks requiring high-speed buffering
• Bus-oriented transmitter and receiver interfaces

Procurement Notes

Verify the specific suffix 'DW' corresponds to the SOIC-20 package configuration as documented in official onsemi datasheets. Confirm that the ordering part number matches the exact logical family (LCX) and functional specifications required for your design. Ensure compliance with RoHS standards and lead-free manufacturing requirements specified by the manufacturer. Cross-reference the component marking code with the official identification guide to prevent counterfeit substitution.

Selection Notes

Select this component when designing systems that require interfacing 1.65V to 3.6V logic with 5V tolerant buses. The MC74LCX244DW is suitable for applications demanding low static power consumption and high noise immunity. Consider its ±24mA drive capability for driving moderate capacitive loads. Evaluate the 6.5ns propagation delay against system timing requirements to ensure signal integrity is maintained across the bus architecture.

Part Context

This component belongs to the 74LCX series of low-voltage CMOS logic devices manufactured by onsemi. The LCX family is designed specifically for applications requiring operation at 2.5V or 3.3V supplies while maintaining compatibility with 5V systems. As an octal buffer, it provides eight independent channels within a single package, offering a compact solution for multi-bit data routing and isolation in portable and battery-powered electronics.

Replacement Considerations

Compatible substitutes include the MC74LCX244D from the same manufacturer in alternative packages, or equivalent parts from other vendors such as Fairchild Semiconductor's 74LCX244. Verify pinout compatibility and electrical parameter equivalence before substitution. Ensure the replacement device meets the same 5V tolerance and low-voltage operational requirements.