CD74FCT623M

Overview

The CD74FCT623M is an 8-bit bus transceiver from the FCT series, manufactured by Harris Corporation. It features non-inverting true outputs and a 3-state interface in a 20-SOIC package. The device operates with independent output enable controls for each direction, supporting bidirectional data transfer. It utilizes BICMOS technology to achieve high-speed performance while maintaining low power consumption. The component is designed for systems requiring reliable data transmission across multiple lines with minimal propagation delay.

Feature Summary

• Bidirectional 8-bit data transfer capability with independent control per direction
• Non-inverting true output configuration ensuring signal integrity
• 3-state output design allowing safe connection to shared buses
• BICMOS construction providing fast switching speeds

Applications

• High-speed data bus interfaces in computing systems
• Memory buffer applications requiring bidirectional flow
• I/O expansion modules for microprocessor-based designs
• Digital communication links needing isolated data paths

Procurement Notes

Verify the manufacturer designation as Harris Corporation on the component marking. Confirm the 20-SOIC package dimensions match your PCB footprint requirements. Check RoHS compliance status as historical data indicates potential non-compliance. Ensure the part number suffix M corresponds to the SOIC variant rather than the PDIP version. Validate authenticity through authorized distributors to avoid counterfeit components.

Selection Notes

Select this component when an 8-bit bidirectional transceiver with independent direction control is required. The FCT series offers faster performance compared to standard TTL logic. Consider the 3-state output feature for bus sharing applications. Verify voltage compatibility with the system's 5V logic levels. Evaluate the package size constraints against the available board space for the 20-SOIC form factor.

Part Context

This device belongs to the Harris FCT logic family, known for high-speed CMOS performance. It serves as a critical interface element in digital circuits where data directionality must be managed independently. The CD74 prefix indicates commercial temperature range operation. It complements other FCT series drivers and receivers in complex system architectures.

Replacement Considerations

Check for direct pin-compatible substitutes within the same FCT series. Verify electrical characteristics such as output drive strength and propagation delay against original specifications. Ensure the replacement supports the same 20-SOIC package type. Confirm that independent enable controls are maintained if used in bidirectional applications.