CD74HC646EN

Overview

The CD74HC646EN is an octal bus transceiver and register featuring three-state non-inverting outputs. It integrates D-type flip-flops to provide storage capability alongside data transmission functions. The device operates with a single power supply and supports bidirectional data flow between two buses. It includes dedicated control inputs for direction selection and output enablement, allowing precise management of data transfer and storage states within digital logic systems.

Feature Summary

• Integrates D-type flip-flops for data storage functionality
• Provides three-state non-inverting outputs for bus isolation
• Supports bidirectional data transfer between two buses

Applications

• Bidirectional bus interfacing in digital systems
• Data storage and transfer applications requiring latching
• Memory interface circuits utilizing bus transceivers

Procurement Notes

Verify the manufacturer marking matches Texas Instruments specifications. Confirm the package type corresponds to the 24-pin DIP configuration. Check for date codes and authenticity markers to ensure component integrity. Review the datasheet for specific electrical characteristics relevant to your operating conditions before finalizing procurement decisions.

Selection Notes

Select this component when both bus transceiving and data latching are required in a single package. Ensure the system voltage aligns with the HC series operational range. Consider the pin count and package style for board layout compatibility. Verify that the three-state output requirements match the bus architecture design constraints.

Part Context

This part belongs to the 74HC family of high-speed CMOS logic devices. It serves as a combined transceiver and register solution. The device replaces separate components by integrating buffering, driving, and storage capabilities. It is designed for applications needing efficient data handling with minimal footprint.

Replacement Considerations

Check for compatible parts within the same 74HC logic family. Verify pin-to-pin compatibility if substituting directly. Ensure equivalent electrical performance metrics are met. Consult official substitution guides for validated alternatives.