SN74HCT574N

Flip Flops Overview

The SN74HCT574N is an octal edge-triggered D-type flip-flop with three-state outputs manufactured by Texas Instruments. It belongs to the SN74HCT574 series and utilizes a 20-pin PDIP package for through-hole installation. The device operates within a supply voltage range of 4.5 V to 5.5 V and supports a maximum clock frequency of 40 MHz. It features non-inverting logic with a typical propagation delay of 22 ns at 5 V. The component includes eight independent circuits, each containing one D-type flip-flop, designed for bus-driven applications.

Flip Flops Feature Summary

• Octal configuration providing eight independent edge-triggered D-type flip-flops within a single integrated circuit
• Three-state outputs enabling direct connection to bus lines or multiple loads without signal contention
• TTL-compatible input thresholds allowing seamless integration with standard TTL logic systems
• Non-inverting polarity ensuring output states directly correspond to input data states

Flip Flops Applications

• Buffer register implementations in digital systems
• I/O port interface circuits for microcontroller connections
• Bidirectional bus driver architectures
• Working register storage elements in processing units

Flip Flops Procurement Notes

Verify the specific ordering suffix matches the required package type, as the base part number may correspond to various physical packages including SOIC or TSSOP variants. Confirm RoHS compliance status and check for lead-free designations such as G4 suffixes if environmental regulations apply. Ensure the selected variant aligns with the intended PCB mounting method, distinguishing between surface-mount and through-hole requirements before finalizing procurement orders.

Flip Flops Selection Notes

Select this component when designing systems requiring eight-bit parallel data storage with tri-state bus compatibility. The HCT logic family is appropriate for interfaces involving TTL-level signaling within 5 V power domains. Consider the 20-pin PDIP package for prototyping or through-hole manufacturing processes. Evaluate the 40 MHz clock speed against system timing requirements to ensure adequate performance margins for the target application frequency.

Flip Flops Part Context

This device is part of the broader SN74HCT574 product family offered by Texas Instruments. The family includes various packaging options such as SOIC, TSSOP, and SSOP configurations alongside the PDIP version. All variants share identical logical functionality and electrical specifications, differing only in physical package dimensions and mounting style. The SN74HCT574 series serves as a standard solution for octal storage applications in industrial and consumer electronics.

Flip Flops Replacement Considerations

Direct substitutes include other SN74HCT574 variants with different package suffixes like SN74HCT574NSR or SN74HCT574PWR. Cross-family alternatives from other manufacturers may require verification of pinout compatibility and electrical parameter alignment. Ensure replacement parts maintain the same HCT logic level compatibility and three-state output characteristics.