74HC564D,653

Overview

The 74HC564D,653 is an octal D-type flip-flop with inverted outputs and 3-state control, manufactured by NXP USA Inc. in the HC logic family. It features a single element containing eight bits, housed in a 20-SOIC package (7.50mm width). The device operates within a supply voltage range of 2V to 6V, supporting a maximum clock frequency of 137MHz. Key electrical parameters include a propagation delay of 14ns at 5V and a typical quiescent current of 8uA. It functions as a positive-edge triggered storage element suitable for bus-oriented applications.

Feature Summary

• Octal D-type flip-flop architecture with independent data inputs for each bit
• Inverted outputs combined with 3-state capability for efficient bus driving
• Positive-edge triggering mechanism for reliable data capture
• CMOS input levels ensuring compatibility with standard logic families

Applications

• Bus-oriented memory and I/O systems
• Microprocessor interface circuits
• Parallel data storage registers
• Industrial control logic modules

Procurement Notes

Verify that the ordering suffix ,653 corresponds to the tape-and-reel packaging format specified by NXP. Confirm the component meets RoHS and REACH environmental directives. Ensure the SOIC-20 package dimensions align with your PCB footprint requirements. Check for any specific handling precautions related to CMOS static sensitivity during assembly processes.

Selection Notes

Select this component when an octal storage solution with inverted outputs is required. The 3-state feature allows direct connection to bidirectional buses without external tri-state buffers. Consider the 137MHz speed rating for high-frequency digital designs. Verify that the HC logic family voltage range matches your system's power supply constraints.

Part Context

This part belongs to the 74HC series, which offers CMOS performance with TTL-compatible input levels. It serves as a standard building block for digital logic designs requiring parallel data retention. The 74HC564 variant specifically provides inverted outputs, distinguishing it from non-inverting counterparts like the 74HC573. It is widely used in embedded systems and consumer electronics.

Replacement Considerations

Direct substitutes include other 74HC564 variants from different manufacturers such as Nexperia or Texas Instruments, provided they share the same pinout and electrical characteristics. Cross-reference package dimensions and voltage specifications to ensure compatibility.