SN74HC574NG4

Flip Flops Overview

The SN74HC574NG4 is an octal edge-triggered D-type flip-flop from Texas Instruments, featuring three-state outputs. It belongs to the HC logic family and operates within a supply voltage range of 2 V to 6 V. The device provides non-inverting outputs with high-level output current of -7.8 mA and low-level output current of 7.8 mA. It utilizes a 20-pin PDIP package for through-hole mounting. The component supports a maximum clock frequency of 28 MHz and exhibits a propagation delay of 265 ns. It functions reliably across an operating temperature range of -40°C to 85°C.

Flip Flops Feature Summary

• Octal configuration containing eight independent D-type flip-flops sharing common clock and output enable inputs.
• Three-state outputs allow direct bus driving without external buffers.
• CMOS input structure ensures compatibility with standard logic levels.
• Non-inverting polarity maintains signal directionality from input to output.

Flip Flops Applications

• Buffer registers in digital systems
• I/O port interfacing
• Bidirectional bus drivers
• Working registers for data storage

Flip Flops Procurement Notes

Verify the G4 suffix indicates lead-free manufacturing compliant with RoHS standards. Confirm the NG4 designation corresponds to the PDIP-20 through-hole package variant. Ensure the ordering code matches the specific pinout and thermal requirements of the target PCB layout. Cross-reference the manufacturer datasheet for exact mechanical dimensions and soldering recommendations.

Flip Flops Selection Notes

Select this component when an octal storage element with tri-state capability is required. The HC series offers balanced speed and power consumption suitable for general-purpose logic applications. Consider the 2V to 6V operating range for flexibility in various voltage domains. The PDIP package is appropriate for prototyping or through-hole assembly processes.

Flip Flops Part Context

This part is a member of the SN74HC574 family, which includes variants with different packages such as SOIC and SSOP. The G4 suffix typically denotes environmental compliance features like lead-free pins. It serves as a fundamental building block for sequential logic circuits requiring parallel data latching and controlled output presentation on shared buses.

Flip Flops Replacement Considerations

• SN74HC574N
• SN74HC574NE4

Flip Flops FAQ

What is the function of the OE input?

The Output Enable (OE) input controls the three-state condition of the outputs, allowing them to be placed in a high-impedance state.

How are the flip-flops triggered?

All eight flip-flops are triggered simultaneously on the positive-going transition of the common Clock (CLK) input.