CY74FCT2543TQCTG4

Overview

The CY74FCT2543TQCTG4 is an octal registered bus transceiver from the Texas Instruments FCT logic series. It features eight bidirectional data channels with three-state outputs and integrated D-type latches for data storage. The device operates within a supply voltage range of 4.75 V to 5.25 V, supporting TTL input and output levels. It is housed in a 20-pin SSOP surface-mount package and is rated for industrial operating temperatures between -40°C and +85°C.

Feature Summary

• Integrates eight D-type latches to capture and hold data at the A ports before transmission to the B ports.
• Provides independent direction control for each channel, allowing flexible bidirectional data flow management.
• Features three-state outputs that facilitate direct connection to system buses without additional buffering.

Applications

• High-speed memory buffer applications requiring data registration.
• Clocked data bus interfaces in embedded systems.
• Bidirectional gate drivers for microcontroller peripheral connections.

Procurement Notes

Verify the specific suffix 'G4' indicates lead-free compliance and RoHS adherence when sourcing. Confirm the 20-SSOP package dimensions match the target PCB footprint. Ensure the supply voltage remains strictly within the 4.75 V to 5.25 V operational window to maintain signal integrity and prevent device damage.

Selection Notes

Select this component when registered bidirectional transfer is required rather than transparent passing found in standard transceivers. The FCT technology offers faster switching speeds compared to legacy 74LS families while maintaining CMOS power efficiency. Consider the 20-pin SSOP form factor for space-constrained designs needing high-density integration.

Part Context

This part belongs to the CY74FCT2543 family of octal registered transceivers. It serves as a bridge between high-speed logic domains and slower peripheral buses. The G4 suffix typically denotes environmental compliance modifications over earlier versions like the CY74FCT2543TQCT, ensuring alignment with modern manufacturing standards.

Replacement Considerations

The CY74FCT2543ATQCT is a documented substitute offering similar functionality in a QSOP-24 package. Verify pin compatibility and package dimensions before swapping, as the SSOP-20 and QSOP-24 footprints differ significantly.