CD74FCT543ATM

Overview

The CD74FCT543ATM is an octal bus transceiver from the FCT series, manufactured by Harris Corporation. It features a single function with eight-bit width and true output polarity. The device utilizes CMOS technology and provides three-state outputs for effective bus line management. It operates within a supply voltage range of 4.75V to 5.25V. The component is housed in a 24-pin SSOP package, designed for surface-mount applications.

Feature Summary

• Provides bidirectional data transfer between two eight-bit buses
• Features independent output enable control for each direction
• Utilizes three-state outputs to prevent bus contention

Applications

• Memory mapping systems
• Clock drivers
• Bus-oriented architectures

Procurement Notes

Verify the manufacturer origin as Harris Corporation or its successors, noting that original Harris logic products are often managed by Texas Instruments. Confirm the specific suffix 'TM' corresponds to the 24-SSOP package variant. Ensure compliance with RoHS directives if required, as older Harris components may not meet current environmental standards.

Selection Notes

Select this component when an octal bus transceiver with independent directional control is required. It is suitable for designs needing high-speed data transfer with low power consumption typical of FCT technology. Consider the SSOP package constraints for PCB layout and ensure the operating voltage matches the 5V system requirement.

Part Context

This part belongs to the CD74FCT family of high-speed CMOS logic devices originally developed by Harris Semiconductor. The FCT series was designed to offer performance comparable to Schottky TTL while maintaining CMOS power efficiency. Harris's semiconductor division was later acquired by Texas Instruments, which continues to support and manufacture many of these legacy logic families.