74HC574N,652

Overview

The 74HC574N,652 is an octal D-type flip-flop manufactured by Nexperia (formerly NXP) in the HC logic family. It features positive edge-triggering and three-state outputs within a 20-pin DIP package. The device operates on a supply voltage range of 2 V to 6 V. Key electrical parameters include a maximum propagation delay of 150 ns at 5 V, with output drive capabilities of -7.8 mA for high-level and 7.8 mA for low-level currents.

Feature Summary

• Octal D-type flip-flop architecture providing eight independent storage elements.
• Positive edge-triggered data transfer synchronized with the clock signal.
• Three-state outputs allowing direct interfacing with bus systems.
• CMOS technology ensuring low input current consumption.

Applications

• Parallel-to-serial data conversion circuits
• Bus driver applications requiring tri-state isolation
• General-purpose digital storage registers
• Interface logic between microprocessors and peripheral devices

Procurement Notes

Verify component authenticity through authorized distributors as the manufacturer may have transitioned product lines. Confirm RoHS compliance status and check for end-of-life notices, as availability varies by region. Ensure the specific suffix matches required packaging standards before ordering.

Selection Notes

Select this component when designing circuits requiring eight-bit parallel storage with tri-state control. Verify that the operating voltage range aligns with the system's power supply. Consider the propagation delay specifications against the target clock frequency to ensure timing requirements are met during data capture.

Part Context

This part belongs to the widely adopted 74HC series of CMOS logic integrated circuits. It serves as a standard solution for digital memory applications in consumer electronics and industrial control systems. The device maintains pinout compatibility with legacy LS logic families while offering improved power efficiency.

Replacement Considerations

• SN74HC574N (Texas Instruments)
• 74HCT574N (Nexperia/NXP)

FAQ

How does the Output Enable input affect the stored data?

The Output Enable input controls the state of the device outputs but does not affect the internal states of the flip-flops. Data remains stored even when outputs are disabled.

What is the trigger mechanism for data transfer?

Data is clocked to the outputs on the rising edge of the Clock signal.