CD74HCT564M

Overview

The CD74HCT564M is an octal D-type flip-flop with positive-edge triggering and three-state outputs, manufactured by Texas Instruments. It belongs to the HCT logic family, ensuring TTL-compatible inputs for high-speed CMOS operation. The device features inverting outputs and operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical parameters include a maximum propagation delay of 35 ns, with high-level output current of -6 mA and low-level output current of 6 mA. It is housed in a 20-pin SOIC package and supports surface-mount installation.

Feature Summary

• Octal configuration providing eight independent D-type flip-flops in a single package
• Positive-edge triggering mechanism for precise data capture on clock transitions
• Three-state outputs enabling direct bus connection without external buffers
• TTL-compatible input thresholds allowing seamless integration with standard logic families

Applications

• High-speed parallel-to-serial or serial-to-parallel data conversion circuits
• Register stages in digital signal processing systems requiring bus interfacing
• Memory address latching in microprocessor-based control architectures
• Data buffering applications where multiple I/O lines require synchronized storage

Procurement Notes

Verify that the ordering suffix matches the required package type, as the base part number may correspond to different physical footprints. Confirm RoHS compliance status through official manufacturer documentation prior to procurement. Ensure the specific variant aligns with the intended operating temperature range and voltage specifications for the target application environment.

Selection Notes

Select this component when an octal register with tri-state capability is required for bus-oriented designs. The HCT series compatibility simplifies interface design with legacy TTL systems. Consider the 35 ns propagation delay for timing constraints. Evaluate the SOIC package dimensions against available PCB space and thermal requirements for the specific deployment scenario.

Part Context

This component is part of the CD74HCT564 series, which includes variants such as the CD74HCT564MG4. It serves as a fundamental building block for sequential logic circuits. The device complements other Texas Instruments logic products like the CD74HCT164 shift register and CD74HCT574 flip-flop, offering distinct octal functionality with three-state outputs for complex digital system implementations.

Replacement Considerations

The CD74HCT564MG4 is a confirmed substitute part number for the CD74HCT564M. Verify pinout compatibility and electrical specifications before substitution. No other cross-model replacements are documented in the provided source material.