CD74HCT652EN

Overview

The CD74HCT652EN is an 8-bit registered bus transceiver from the 74HCT series, manufactured by Harris Corporation. It features a single function with true output polarity and three-state outputs. The device operates within a supply voltage range of 4.5V to 5.5V and supports bidirectional data transmission. It is housed in a 24-pin Dual In-Line Package (DIP). The component includes independent control logic and is designed for multiplexed transmission of registered or real-time data. It functions as a non-inverting transceiver with one element containing eight bits per element.

Feature Summary

• Provides registered bus transceiver functionality for 8-bit data paths
• Supports bidirectional data flow with independent control inputs
• Features three-state outputs for efficient bus sharing
• Designed for multiplexed transmission of registered and real-time data

Applications

• Multiplexed data transmission systems
• Registered bus interfaces in digital circuits
• Bidirectional data buffering applications
• Real-time data routing in CMOS logic systems

Procurement Notes

Verify the manufacturer designation as Harris Corporation or its successors, noting that original Harris Semiconductor assets were acquired. Confirm the package type is strictly 24-pin DIP. Check RoHS compliance status, as sources indicate non-compliance. Ensure the part number suffix EN corresponds to the specific DIP variant and verify operational temperature ranges against system requirements.

Selection Notes

Select this component when an 8-bit registered bus transceiver with HCT logic compatibility is required. It is suitable for systems needing bidirectional data transfer with registration capabilities. Consider the 24-pin DIP package constraint for through-hole designs. Verify that the 4.5V to 5.5V operating voltage aligns with the target system's power supply rails and that the three-state output characteristics meet bus isolation needs.

Part Context

This device belongs to the 74HCT logic family, which offers CMOS speed with TTL-compatible input levels. The 652 variant specifically integrates register functionality into the bus transceiver architecture. Harris Corporation was a prominent semiconductor manufacturer before its logic division was acquired by Intersil and subsequently Renesas. This part represents legacy industrial-grade logic components still referenced in maintenance and specific design contexts.

Replacement Considerations

Cross-reference with other 74HCT652 variants from different manufacturers if sourcing availability is constrained. Verify pinout compatibility and electrical specifications such as propagation delay and drive current. Note that while functional equivalents exist, packaging differences may require adapter solutions or PCB redesigns.