CD74FCT543SM

Overview

The CD74FCT543SM is an octal bus transceiver manufactured by Harris Corporation, belonging to the FCT logic series. It features a single functional unit with eight bits per element and true output polarity. The device utilizes CMOS technology and provides three-state outputs for effective bus line management. It operates within a supply voltage range of 4.75V to 5.25V and is housed in a 24-pin Small Outline Integrated Circuit (SOIC) package with a width of 0.295 inches.

Feature Summary

• Octal bus transceiver architecture supporting high-speed data transfer
• Three-state outputs allowing safe connection to shared bus lines
• True output polarity maintaining signal integrity without inversion

Applications

• Memory mapping systems requiring bidirectional data flow
• Clock drivers for synchronous digital circuits
• Bus-oriented communications interfaces

Procurement Notes

Verify component authenticity through manufacturer documentation or authorized distributors. Confirm RoHS compliance status as historical records indicate non-compliance for this specific part number. Ensure the SOIC-24 package matches design requirements. Check for moisture sensitivity level constraints during storage and handling procedures.

Selection Notes

Select this component when an octal bidirectional buffer with three-state capability is required. The FCT series offers faster switching speeds compared to standard TTL equivalents. Verify that the 4.75V to 5.25V operating voltage aligns with the system power supply. Consider the 24-SOIC package dimensions for PCB layout compatibility.

Part Context

This device is part of the Harris Corporation FCT logic family, designed for high-performance digital applications. The CD74FCT543 variant specifically serves as an octal bus transceiver. It shares functional similarities with other FCT bus drivers but is distinguished by its bidirectional control and tri-state output configuration suitable for complex bus architectures.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.