SN74HCT574DBRE4

Flip Flops Overview

The SN74HCT574DBRE4 is an octal edge-triggered D-type flip-flop with three-state outputs manufactured by Texas Instruments. It belongs to the HCT logic family, designed for high-speed CMOS operation with TTL-compatible inputs. The device features a 20-pin SSOP surface-mount package and operates within a supply voltage range of 4.5 V to 5.5 V. Key electrical characteristics include a maximum propagation delay of 22 ns at 5 V and output drive capabilities suitable for bus driving. It supports a wide operating temperature range from -40°C to +85°C.

Flip Flops Feature Summary

• Octal configuration providing eight independent D-type flip-flops in a single package
• Three-state outputs enable direct connection to bus-oriented systems without external buffers
• TTL-compatible input thresholds allow seamless interfacing with standard logic families
• Edge-triggered data storage ensures precise timing control for synchronous digital circuits

Flip Flops Applications

• Buffer registers for temporary data storage in digital systems
• I/O ports for interface management between microprocessors and peripherals
• Bidirectional bus drivers for managing data flow across system buses
• Working registers for holding intermediate calculation results

Flip Flops Procurement Notes

Verify the presence of the E4 suffix on the component marking to confirm compliance with environmental directives. Ensure the SSOP-20 package dimensions match the PCB footprint requirements. Cross-reference the datasheet revision date to confirm technical specifications align with current design standards. Confirm that the supply voltage levels in the target application remain within the specified 4.5 V to 5.5 V operational window.

Flip Flops Selection Notes

Select this component when TTL-compatible input levels are required alongside high-speed CMOS performance. The HCT series offers lower power consumption compared to older LS variants while maintaining noise immunity. Consider the SSOP package size constraints and thermal dissipation needs for dense board layouts. Verify that the three-state output impedance meets the load requirements of the connected bus lines.

Flip Flops Part Context

This part is part of the SN74HCT574 family of octal flip-flops. The E4 suffix indicates lead-free manufacturing and RoHS compliance. It serves as a digital storage element in complex integrated circuit designs. The device replaces earlier non-compliant versions while maintaining pinout and functional compatibility.

Flip Flops Replacement Considerations

SN74HCT574DR is available as a direct equivalent without the environmental suffix. SN74HCT574D offers the same logical function in a similar SOIC or SSOP format. Verify pin compatibility before substituting with other octal flip-flop variants.