CD74HC574E

Overview

The CD74HC574E is an octal edge-triggered D-type flip-flop manufactured by Texas Instruments within the 74HC logic family. It features eight independent D-type flip-flops with true outputs and three-state control, housed in a 20-pin DIP package. The device operates on a single power supply ranging from 2V to 6V, ensuring compatibility with standard CMOS logic levels. Designed for high-speed digital applications, it provides reliable data storage and bus interfacing capabilities while maintaining low power consumption characteristics typical of the HC series.

Feature Summary

• Octal configuration providing eight independent edge-triggered D-type flip-flops for parallel data storage
• Three-state output capability allowing direct connection to system buses without external drivers
• True output polarity delivering non-inverted signals corresponding directly to input states

Applications

• Parallel-to-serial data conversion circuits
• Bus interface buffering for microprocessor systems
• Digital signal processing data registers

Procurement Notes

Verify the specific suffix 'E' indicates the standard plastic DIP package variant when sourcing. Confirm RoHS compliance status through official manufacturer documentation or authorized distributor datasheets prior to procurement. Ensure the supplier provides traceable origin certificates if required for quality assurance protocols in regulated industries.

Selection Notes

Select this component when an octal storage solution with bus-compatible outputs is required. Compare against SN74HC574N for pin-compatible alternatives in different packaging formats. Consider voltage range requirements as the HC series supports wider supply voltages than HCT variants. Evaluate propagation delay specifications against system clock speeds to ensure timing margins are met.

Part Context

This part belongs to the widely adopted 74HC series of high-speed CMOS logic devices. It serves as a fundamental building block for sequential logic circuits requiring multiple bit storage. The device complements other 74HC family members like shift registers and multiplexers in complex digital designs.

Replacement Considerations

• SN74HC574N
• CD74HC574PWR

FAQ

What is the function of the OE pin?

The Output Enable (OE) pin controls the three-state output buffers. When active low, outputs reflect the Q states; when high, outputs enter a high-impedance state.

How does the clock edge affect data capture?

Data at the D inputs is captured on the positive-going transition (rising edge) of the clock signal.