74LCX245MSAX

Overview

The Fairchild Semiconductor 74LCX245MSAX is an octal bus transceiver belonging to the LCX logic family. It features eight non-inverting bidirectional buffers with three-state outputs, designed for low-voltage applications at 2.5V and 3.3V VCC. The device supports interfacing with a 5V signal environment due to its 5V tolerant inputs and outputs. Data flow direction is controlled by the DIR input, while the OE input enables or disables the outputs. This component is intended for bus-oriented applications requiring high-speed operation with low power dissipation.

Feature Summary

• Provides bidirectional data transmission across two buses using eight channels of non-inverting buffers.
• Features three-state outputs that allow connection to shared data lines without electrical conflict.
• Incorporates 5V tolerant I/O structures enabling safe interface between low-voltage and 5V systems.
• Supports live insertion and withdrawal capabilities to prevent system damage during hot swapping.

Applications

• Bus-oriented memory systems
• Microprocessor control systems
• Asynchronous bidirectional data buses

Procurement Notes

Verify the specific suffix 'MSA' against the manufacturer's official datasheet to confirm package type and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements if applicable to your assembly process. Cross-reference the ordering code with current Fairchild or ON Semiconductor catalogs to confirm availability status and lead times before finalizing procurement plans.

Selection Notes

Select this component when designing systems that require level shifting between 3.3V or 2.5V logic domains and 5V environments. The 74LCX245MSAX is suitable for applications demanding low propagation delay and reduced power consumption compared to standard CMOS devices. Consider the package constraints and thermal requirements associated with the MSOP-20 form factor during PCB layout.

Part Context

This part belongs to the 74LCX series of advanced low-voltage CMOS logic devices. The LCX family is characterized by high speed and low power dissipation, making it ideal for portable and battery-operated equipment. As an octal transceiver, it serves as a critical interface element in digital circuits, facilitating efficient data movement between different system segments.

Replacement Considerations

Compatible substitutes include the TC74LCX245F from Toshiba and the MC74LCX245D from ON Semiconductor. Verify pin compatibility and electrical characteristics such as propagation delay and output drive strength before substituting.