74LCX240WM

Overview

The 74LCX240WM is a low voltage octal buffer and line driver manufactured by Fairchild Semiconductor. It operates within a supply voltage range of 2.0V to 3.6V and features five-volt tolerant inputs and outputs, allowing interface with 5V systems. The device contains two independent elements, each providing four bits of buffering with three-state output control. Packaged in a 20-pin SOIC format, it is designed for high-speed bus driving applications requiring low power consumption and robust signal integrity.

Feature Summary

• Provides dual octal buffering with three-state output capability for efficient bus management
• Features five-volt tolerant I/Os enabling safe interfacing between 2V/3.6V and 5V logic domains
• Designed for low voltage operation to support modern low-power digital system requirements

Applications

• Bus driving in low voltage digital systems
• Interface bridging between 3.3V and 5V logic circuits
• High-speed data transmission lines

Procurement Notes

Verify the component status as discontinued or obsolete through official manufacturer channels before procurement planning. Confirm that the 20-SOIC package matches your PCB footprint requirements. Ensure compatibility with existing design constraints regarding low voltage operation and five-volt tolerance specifications.

Selection Notes

Select this component when designing systems requiring octal buffering with mixed voltage domain interfacing capabilities. The five-volt tolerant feature is critical for legacy system integration. Verify that the operating voltage range aligns with the target system's power supply architecture and that the three-state functionality meets bus arbitration needs.

Part Context

This part belongs to the LCX series of low voltage CMOS logic devices from Fairchild Semiconductor. The LCX family is characterized by its ability to operate at reduced voltages while maintaining compatibility with standard 5V logic levels. This specific model provides octal buffering functionality essential for complex digital architectures.

Replacement Considerations

The 74LCX240WMX is a documented variant within the same product family. Verify pinout and electrical specifications against current datasheets to ensure functional equivalence before substitution.