74LCX240SJ

Overview

The Fairchild Semiconductor 74LCX240SJ is a low-voltage CMOS octal buffer and line driver featuring three-state outputs. It operates within a supply voltage range of 2.3V to 3.6V, with specific specifications provided for this range. The device incorporates advanced CMOS technology to achieve high-speed operation while maintaining low power dissipation characteristics typical of CMOS logic families.

Feature Summary

• Features five-volt tolerant inputs and outputs, enabling direct interfacing between low-voltage systems and 5V signal environments without level shifting components.
• Provides three-state output control via dedicated enable pins, allowing multiple drivers to share a common bus structure safely.
• Supports live insertion and withdrawal operations due to high-impedance states during power-down conditions.

Applications

• Memory address drivers in embedded systems requiring voltage translation.
• Clock distribution networks where low skew and drive capability are necessary.
• Bus-oriented transmitter and receiver circuits in data communication interfaces.

Procurement Notes

Verify the exact suffix against manufacturer documentation to confirm package type and tape/reel specifications. Ensure the component matches the required operating temperature range and voltage tolerances for your specific circuit design before procurement.

Selection Notes

Select this component when interfacing 3.3V logic with 5V peripherals is required. Consider the three-state functionality for bus sharing applications. Verify that the drive current requirements of the load do not exceed the specified limits for the chosen supply voltage.

Part Context

This part belongs to the 74LCX series of low-voltage CMOS logic devices. The LCX family is designed specifically for applications requiring compatibility between 3.3V and 5V systems. Similar parts in the series include buffers, inverters, and gates with varying input/output configurations.

Replacement Considerations

Check for pin-compatible alternatives from other manufacturers such as ON Semiconductor or NXP. Ensure replacement parts maintain the same 5V tolerance and three-state output capabilities. Verify electrical parameters like propagation delay and output drive strength match the original design requirements.