CD74HC574E

Overview

The CD74HC574E is an octal D-type flip-flop manufactured by Harris Corporation, belonging to the 74HC logic family. It features eight positive-edge-triggered registers with three-state outputs. The device operates on a single power supply ranging from 2V to 6V and supports surface-mount installation in a 20-pin SOIC package. It functions as a standard logic circuit designed for digital data storage applications.

Feature Summary

• Octal configuration containing eight independent D-type edge-triggered flip-flops
• Three-state output capability allowing bus driving and isolation
• CMOS technology ensuring low power consumption and high noise immunity

Applications

• Parallel-to-serial data conversion circuits
• General-purpose register storage elements
• Buffer memory interfaces in digital systems

Procurement Notes

Verify manufacturer origin carefully, as Harris Corporation's semiconductor assets were acquired by Texas Instruments. Ensure the specific suffix 'E' corresponds to the correct package variant and that RoHS compliance status matches project requirements, as legacy documentation may vary. Confirm pinout compatibility with target PCB footprint before ordering.

Selection Notes

Select this component when an octal register with tri-state control is required within a 2V to 6V operating range. It serves as a direct functional replacement for other 74HC574 variants from different manufacturers, provided voltage levels and package dimensions align with the design constraints. Consider propagation delay specifications if timing sensitivity is critical.

Part Context

This part belongs to the widely adopted 74HC series of high-speed CMOS logic devices. These components are standardized across the industry for general-purpose digital logic functions. The CD74HC574 specifically addresses the need for multi-bit data latching with output enablement, forming a fundamental building block in microprocessor-based system architectures.

Replacement Considerations

Equivalent parts include SN74HC574 from Texas Instruments and MC74HC574 from onsemi. Verify package width and pin alignment when substituting, as physical dimensions may differ slightly between manufacturers despite identical logical functionality.