CD74FCT543TM

Overview

The CD74FCT543TM is an octal bus transceiver manufactured by Harris Corporation, belonging to the FCT logic series. It features non-inverting data transmission with three-state outputs and operates within a voltage range of 4.75V to 5.25V. The device utilizes CMOS technology and is housed in a 24-pin SOIC package. It supports bidirectional data flow controlled by a direction signal and includes output enable functionality.

Feature Summary

• Non-inverting octal bus transceiver architecture
• Three-state output capability for bus line isolation
• Bidirectional data transfer with independent direction control
• CMOS construction for low power consumption

Applications

• Memory module data buffering
• Microprocessor system data buses
• Control signal routing in embedded systems

Procurement Notes

Verify the manufacturer designation as Harris Corporation on the component marking. Confirm the package type is 24-SOIC and the logic family is FCT. Check RoHS compliance status as indicated in official documentation. Ensure the part number suffix matches the specific tape-and-reel or tube configuration required for your assembly process.

Selection Notes

Select this component when non-inverting octal data transfer is required with three-state isolation. It is suitable for 5V logic systems needing high-speed performance characteristic of the FCT series. Consider the 24-pin SOIC footprint for PCB layout constraints. Verify that the input voltage levels are compatible with the driving source signals.

Part Context

This device is part of the Harris FCT (Fast CMOS Technology) family, designed for high-speed digital applications. It serves as a buffer and driver for bidirectional data lines. The FCT series offers performance comparable to LS-TTL but with CMOS power advantages. This specific model provides eight bits of non-inverting transfer.

Replacement Considerations

Check for direct pin-compatible substitutes from Harris or acquired manufacturers like National Semiconductor. Verify electrical parameters such as propagation delay and output drive current match the original specifications. Ensure the replacement maintains the same 24-SOIC package and voltage operating range.