CY74FCT2543TQCTE4

Overview

The CY74FCT2543TQCTE4 is an octal registered bus transceiver manufactured by Texas Instruments. It belongs to the FCT logic series and features eight bidirectional data channels with three-state outputs. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports TTL input and output levels. It is housed in a 24-pin SOIC package and functions as a non-inverting latched transceiver. The component is designed for surface mount installation and ensures reliable data transfer in digital systems.

Feature Summary

• Provides octal bidirectional data transmission capabilities with registered storage
• Features three-state outputs to facilitate direct connection to system buses
• Supports non-inverting signal paths compatible with TTL logic levels

Applications

• High-speed data bus architectures requiring registered buffering
• Memory interface circuits utilizing octal data lines
• Digital communication systems needing isolated bidirectional data paths

Procurement Notes

Verify the specific suffix E4 indicates lead-free compliance when sourcing this component. Confirm the package type matches the required 24-SOIC footprint for PCB layout compatibility. Ensure the manufacturer designation aligns with current Texas Instruments production standards rather than legacy Cypress specifications. Cross-reference the datasheet revision to confirm electrical characteristics match the design requirements.

Selection Notes

Select this component for applications requiring registered octal data transfer with high noise immunity. The FCT series offers faster switching speeds compared to standard CMOS equivalents. Consider the 24-SOIC package constraints for thermal management and board space. Verify that the operating temperature range meets the environmental conditions of the target application.

Part Context

This part is part of the broader 74FCT family of high-speed CMOS logic devices. It serves as a registered variant of the unbuffered 74FCT245 transceiver. The device integrates clocked D-type flip-flops to latch input data before driving the bus. This registration feature helps mitigate glitches during data transitions on shared system buses.

Replacement Considerations

Public confirmed substitute part numbers include CY74FCT2543ATQCT and CY74FCT2543CTQCT.