CY74FCT2543ATQCT

Overview

The CY74FCT2543ATQCT is an octal registered bus transceiver from the FCT logic series, manufactured by Texas Instruments. It features a 24-pin QSOP package with surface mount installation. The device operates within a supply voltage range of 4.75 V to 5.25 V and supports TTL input and output levels. It provides non-inverting data transfer with tri-state outputs. Key electrical parameters include a propagation delay of 5.5 ns and output currents of -15 mA (high) and 12 mA (low). The component functions reliably across an industrial temperature range of -40 °C to +85 °C.

Feature Summary

• Octal registered architecture for synchronized data latching and transfer
• Tri-state outputs enable efficient bus line management
• TTL-compatible interface levels ensure broad system integration

Applications

• High-speed data acquisition systems requiring registered buffering
• Industrial control networks utilizing bus topology
• Memory interface circuits in embedded computing platforms

Procurement Notes

Verify the specific suffix 'ATQCT' against the manufacturer's current datasheet to confirm pinout compatibility and moisture sensitivity classification. Ensure the QSOP-24 footprint matches the target PCB design. Confirm RoHS compliance status as indicated in official documentation before finalizing procurement orders.

Selection Notes

Select this component when registered bidirectional data transfer is required for eight-bit buses. The FCT series offers faster switching speeds compared to standard CMOS alternatives. Verify that the 12 mA low-level sink current meets the load requirements of the destination circuitry without exceeding thermal limits.

Part Context

This part belongs to the CY74FCT2543T family of registered bus transceivers. It serves as a bridge between microprocessors and peripheral devices, providing temporary storage and direction control. The FCT technology combines CMOS power efficiency with transistor-transistor logic speed characteristics.

Replacement Considerations

The CY74FCT2543ATSOC is a documented alternative offering identical functionality in a SOIC-24 package. Verify pin-to-pin compatibility and package dimensional differences before substituting.