74HC646N,652

Overview

The 74HC646N,652 is an octal bus transceiver and register manufactured by Nexperia. It features three-state outputs and operates within a supply voltage range of 2 V to 6 V. The device provides non-inverting data transfer with a maximum propagation delay of 220 ns. It supports low-level output currents of 7.8 mA and high-level output currents of -7.8 mA. The component functions as a single circuit with eight channels and utilizes CMOS input and output levels.

Feature Summary

• Octal bus transceiver functionality with integrated register capability
• Three-state outputs for effective bus line management
• Non-inverting data transfer configuration

Applications

• Data bus buffering in digital systems
• Memory interface circuits
• I/O port expansion modules

Procurement Notes

Verify the manufacturer designation carefully, as this part number may be associated with Nexperia following corporate restructuring. Confirm the specific package type and suffix requirements against current official datasheets before procurement. Ensure compatibility with existing system voltage levels and logic families during integration planning.

Selection Notes

Select this component for applications requiring octal data storage and bidirectional bus interfacing. Evaluate the 2 V to 6 V operating range against system power constraints. Consider the 220 ns propagation delay for timing-sensitive designs. Verify that the three-state output characteristics meet the bus isolation requirements of the target architecture.

Part Context

This component belongs to the HC/UH series of CMOS logic devices. It serves as a standard solution for managing wide data buses in embedded systems. The device integrates both transceiver and register functions into a single package, reducing board space compared to discrete solutions. It is designed for general-purpose digital logic applications.

Replacement Considerations

Check for equivalent parts from Nexperia or other manufacturers offering identical octal transceiver specifications. Verify pinout compatibility and electrical parameters such as voltage range and drive strength before substitution.