74LCX240MSAX

Overview

The Fairchild Semiconductor 74LCX240MSAX is a low-voltage octal buffer and line driver featuring five-volt tolerant inputs and outputs. It operates within a supply voltage range of 2.0V to 3.6V and utilizes a 20-SSOP package with 20 pins. The device provides bidirectional data transmission with a maximum propagation delay of 5.2ns at 50pF load capacitance. Output drive capabilities include a maximum high-level output current of -24mA and a low-level output current of 24mA. It functions in non-inverting mode across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides bidirectional data transmission between two buses using five-volt tolerant I/O structures
• Features low-voltage operation compatible with 2.5V and 3.3V systems while interfacing with 5V environments
• Offers high-speed performance suitable for memory and microprocessor-based applications

Applications

• Memory mapping control circuits
• Clock drivers and buffering
• Bus-oriented transmissions

Procurement Notes

Verify the specific suffix 'MSAX' against the manufacturer's official datasheet to confirm pinout, electrical characteristics, and RoHS compliance status. Ensure the component matches the required 20-SSOP package dimensions and thermal specifications for your design. Cross-reference the part number with authorized distributors to confirm availability and authenticity, as this series may have discontinued variants or updated revisions.

Selection Notes

Select this component when designing systems requiring bidirectional data transfer between low-voltage logic domains and five-volt tolerant interfaces. It is appropriate for applications needing octal buffering with high-speed performance and low power consumption. Consider the 20-SSOP package constraints and ensure the supply voltage remains within the 2.0V to 3.6V range for optimal operation.

Part Context

This component belongs to the 74LCX family of low-voltage CMOS logic devices manufactured by Fairchild Semiconductor. The family is characterized by high speed, low power dissipation, and compatibility with standard CMOS and LSTTL logic levels. The 74LCX240 variant specifically serves as an octal buffer/line driver, providing robust signal integrity for high-density digital systems.

Replacement Considerations

Check for direct equivalents such as the NXP 74LCX240 or onsemi variants with identical pinouts and electrical specs. Verify that any substitute maintains the same 20-SSOP footprint and five-volt tolerance characteristics.