CY74FCT543ATSOC

Overview

The CY74FCT543ATSOC is an octal registered bus transceiver from the FCT logic series, manufactured by Texas Instruments. It features eight bidirectional data paths with latched outputs and three-state capability. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports TTL input and output levels. Key electrical parameters include a propagation delay of 8.5 ns, low-level output current of 64 mA, and high-level output current of -32 mA. It functions in non-inverting mode with a single circuit configuration. The component is housed in a 24-pin SOIC package and is rated for operation between -40°C and +85°C.

Feature Summary

• Octal Registered Bus Transceiver
• Three-State Outputs
• Bidirectional Data Paths
• TTL Compatible Levels

Applications

• High-speed data bus architectures
• Memory buffer applications
• I/O port expansion systems
• Digital signal routing networks

Procurement Notes

Verify the specific suffix 'A' against official Texas Instruments documentation to confirm temperature grade and manufacturing lot details. Ensure the SOIC-24 package dimensions match the target PCB footprint requirements. Confirm RoHS compliance status through the latest datasheet revision notes before finalizing procurement specifications.

Selection Notes

Select this component when designing systems requiring registered data storage at the bus interface point. The FCT series offers speed comparable to LS-TTL with CMOS power consumption. Verify that the system voltage aligns with the 4.75 V to 5.25 V operating range. Consider the 8.5 ns propagation delay for timing closure in high-frequency digital designs.

Part Context

This part belongs to the CY74FCT543T family of registered bus transceivers. It provides latched bidirectional transfer of eight bits of data. The device integrates output enable controls for each direction, allowing flexible bus management. It is designed for use in microprocessor-based systems where data integrity and bus isolation are critical.

Replacement Considerations

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