CD74HC564E

Overview

The CD74HC564E is an octal positive-edge-triggered inverting D-type flip-flop manufactured by Harris Corporation. It features high-speed CMOS logic technology and includes three-state outputs for effective bus driving. The device operates within a supply voltage range of 2V to 6V and supports a wide operating temperature range from -55°C to 125°C. It is housed in a 20-pin DIP package with a width of 0.300 inches (7.62mm), designed for surface or through-hole mounting in various digital logic applications.

Feature Summary

• Octal configuration providing eight independent D-type flip-flops in a single package
• Positive-edge triggering mechanism for precise data capture timing
• Inverting output structure combined with three-state capability for flexible bus interfacing
• High-speed CMOS construction ensuring low power consumption and noise immunity

Applications

• Parallel-to-serial data conversion circuits
• Shift register implementations in communication systems
• Memory buffer stages in microprocessor interfaces
• Digital signal processing data latching applications

Procurement Notes

Verify the specific manufacturer source, as L3Harris Technologies may be the current rights holder. Confirm RoHS compliance status, as older Harris documentation indicates non-compliance. Ensure the 20-DIP package variant matches the required PCB footprint. Check for moisture sensitivity level requirements during storage and handling procedures.

Selection Notes

Select this component when an octal inverting flip-flop with three-state outputs is required. Consider the HC series speed and voltage characteristics against system requirements. Evaluate the DIP package suitability for prototyping versus SMD alternatives for production. Verify compatibility with existing clock and data line specifications.

Part Context

This part belongs to the 74HC family of high-speed CMOS logic devices. It complements other Harris logic components like the CD74HCT646M transceiver. The device serves as a fundamental building block for sequential logic design. Its octal format reduces board space compared to using multiple single-bit flip-flops.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-reference with standard 74HC564 equivalents from other manufacturers if Harris stock is unavailable. Ensure pinout and electrical characteristics match before substitution.