CD74FCT16543ETSM

Overview

The CD74FCT16543ETSM is a bus transceiver from the FCT series, manufactured by Harris Corporation. It features two independent functions, each handling eight bits of data with true output polarity. The device utilizes CMOS technology and is housed in a 56-pin SSOP package (SSOP56,.4). It supports bidirectional data flow with independent control capabilities. The component operates within a temperature range of -40 °C to 85 °C and provides three-state outputs with series resistors.

Feature Summary

• Bus hold inputs eliminate the need for external pull-up resistors
• Independent control for dual eight-bit functions
• Bidirectional data transfer capability

Applications

• High-speed data bus interfacing
• Memory buffer applications
• I/O port expansion

Procurement Notes

Verify RoHS compliance status as the component is listed as non-compliant in available documentation. Confirm the specific suffix 'E' and 'TSM' corresponds to the required tape-and-reel packaging and environmental specifications. Ensure the manufacturer source is validated against current L3Harris Technologies records due to corporate restructuring history.

Selection Notes

Select this component when a bidirectional, high-speed bus transceiver with integrated bus-hold functionality is required. The FCT series offers speed comparable to LS logic but with CMOS power consumption. Verify that the 56-pin SSOP footprint matches the target PCB design constraints and that the voltage levels are compatible with the system logic family.

Part Context

This part belongs to the Harris FCT (Fast CMOS) logic family, designed for high-speed digital applications. Harris Corporation's logic products were later acquired by L3Harris Technologies. The CD74FCT16543 variant specifically addresses systems requiring isolated, bidirectional data paths with minimal external component requirements for input holding.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.