CD74FCT543ATQM

Overview

The CD74FCT543ATQM is an octal registered bus transceiver manufactured by Harris Corporation, belonging to the FCT logic series. It features eight non-inverting channels with three-state outputs housed in a 24-pin QSOP package. The device operates on a supply voltage ranging from 4.75 V to 5.25 V and supports TTL input and output levels. Key electrical parameters include a propagation delay of 6.5 ns, a low-level output current of 64 mA, and a high-level output current of -32 mA. It functions within a temperature range of -40°C to +85°C.

Feature Summary

• Octal Registered Bus Transceiver
• Three-State Outputs
• Non-Inverting Logic
• TTL Compatible Levels

Applications

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

Procurement Notes

Verify the manufacturer designation as Harris Corporation for this specific part number. Confirm the package type is QSOP-24 and ensure the operating temperature range matches industrial specifications. Cross-reference datasheets to validate the FCT logic family characteristics and electrical ratings before procurement.

Selection Notes

Select this component for applications requiring registered data latching and bidirectional bus driving. Ensure the system voltage remains within the 4.75 V to 5.25 V range. Verify that the load capacitance requirements are met by the specified output drive currents. Consider the thermal performance within the -40°C to +85°C operational envelope.

Part Context

This component is part of the CD74FCT543T series of registered bus transceivers. It provides eight bits of data storage and transmission capability. The device integrates clocked registration with tri-state bus interfacing. It is designed for CMOS technology with TTL-compatible inputs.