74LCX543WM

Overview

The Fairchild Semiconductor 74LCX543WM is an octal bus transceiver featuring registered outputs, designed for low-voltage CMOS applications. It operates within a supply voltage range of 2.0V to 3.6V and supports data transmission rates up to 100MHz. The device incorporates D-type flip-flops to latch data from the A or B buses upon clock activation, enabling multiplexed transmission. It provides independent output enable controls for each direction and features 5V tolerant inputs and outputs, facilitating seamless interfacing between 3.3V systems and 5V environments while maintaining low power dissipation.

Feature Summary

• Registered bidirectional data transfer with D-type flip-flop storage
• Independent output enable control for each transmission direction
• 5V tolerant inputs and outputs for mixed-voltage system compatibility
• Low power consumption with high-speed operation capabilities

Applications

• Clocking data into registers in memory architectures
• Bidirectional bus driving in low-voltage embedded systems
• Interfacing 3.3V logic circuits with 5V signal environments
• Multiplexed data transmission in portable electronic devices

Procurement Notes

Verify the specific suffix 'WM' against official datasheets to confirm package type and tape-and-reel specifications. Ensure the component meets RoHS compliance requirements for your region. Confirm that the manufacturer designation aligns with current Diodes Incorporated ownership following the acquisition of Fairchild Semiconductor assets. Validate pinout configurations against the target PCB footprint before procurement.

Selection Notes

Select this component when registered bidirectional data transfer is required in low-voltage designs. It is suitable for applications needing 5V tolerance on both input and output lines. Consider this part for systems operating at 3.3V or 2.5V where noise immunity and low power are priorities. Ensure the design accommodates the necessary clock and output enable signals for proper register control.

Part Context

This component belongs to the 74LCX series, which utilizes advanced CMOS technology for high-speed performance with low power dissipation. The LCX family is specifically engineered for low-voltage operations, typically ranging from 2.0V to 3.6V. This series offers improved speed-power product compared to older LVC or HC families, making it ideal for modern battery-powered and low-voltage digital systems.

Replacement Considerations

Check for equivalents such as the PI74LCX543SX or onsemi 74LCX543MSA. Verify functional compatibility regarding voltage levels and I/O characteristics. Ensure package dimensions match the existing board layout if substituting with different manufacturers.