CD74HCT564E

Overview

The CD74HCT564E is an octal D-type flip-flop manufactured by Harris Corporation, belonging to the HCT logic series. It features eight independent positive-edge-triggered circuits with inverting outputs housed in a 20-pin DIP package. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports TTL input levels. Key electrical characteristics include a propagation delay of 35 ns at 4.5 V, a low-level output current of 32 mA, and a high-level output current of -6 mA. It functions reliably across an extended temperature range from -55°C to +125°C.

Feature Summary

• Octal configuration providing eight independent D-type flip-flops for parallel data handling
• Positive-edge triggering mechanism ensures precise synchronization with clock signals
• Inverting output polarity provides logical complement states directly from the flip-flops
• TTL-compatible inputs allow direct interfacing with standard digital logic systems

Applications

• High-speed data storage registers in digital processing units
• Parallel-to-serial conversion interfaces requiring edge-triggered latching
• Industrial control systems operating under extreme environmental conditions
• Memory buffer stages in communication equipment

Procurement Notes

Verify that the component matches the specific Harris Corporation manufacturing origin rather than Texas Instruments variants. Confirm the PDIP-20 through-hole package type aligns with board layout requirements. Ensure the inverting output characteristic meets circuit design specifications. Check RoHS compliance status as indicated in official documentation before finalizing procurement orders.

Selection Notes

Select this component when an octal register with inverting outputs is required for high-speed applications. The HCT series compatibility ensures seamless integration with existing TTL-based architectures. Consider the wide operating temperature range for deployments in harsh industrial environments. Verify that the 32 mA low-level sink capability satisfies load driving requirements without external buffering.

Part Context

This part belongs to the CD74HCT564 family of octal flip-flops produced by Harris Corporation. It serves as a specialized memory element within the broader 74HCT logic ecosystem. The device complements other Harris logic components by offering high-density storage capabilities in a standard dual-in-line package format suitable for legacy and modern mixed-signal designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided source material.