CY74FCT543CTQCTE4

Overview

The CY74FCT543CTQCTE4 is an octal registered transceiver from the Texas Instruments FCT logic series. It features eight non-inverting data paths with three-state outputs and integrated D-type flip-flops for data latching. The device operates within a supply voltage range of 4.75 V to 5.25 V, supporting 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 as a single circuit with eight channels in a surface-mount package.

Feature Summary

• Integrates D-type flip-flops to provide registered data storage capabilities alongside bus transmission.
• Features three-state outputs that allow direct connection to system buses without additional line drivers.
• Supports bidirectional data flow between two independent 8-bit buses under common control.

Applications

• Clocked memory mapping
• Bus-oriented architecture systems
• Registering data transfers

Procurement Notes

Verify the specific suffix 'E4' indicates lead-free compliance and RoHS status when sourcing. Confirm the package type matches the design requirements, as variations exist within the family. Check current production status, as some variants may be discontinued or subject to change. Ensure the supplier provides valid datasheets confirming the exact electrical characteristics for the specific revision.

Selection Notes

Select this component when registered bus transfer is required rather than transparent latching. Compare propagation delays against other FCT variants if timing constraints are critical. Verify that the 5V supply voltage aligns with the target system power rails. Consider the pinout compatibility with alternative packages like SOIC or SSOP if board layout changes are necessary.

Part Context

This part belongs to the CY74FCT543T family of octal bus transceivers. It shares functional similarities with the standard CY74FCT543 but includes specific manufacturing revisions indicated by the suffix. The FCT series is designed for high-speed CMOS applications requiring low power consumption and fast switching speeds compared to older logic families.