74AHCT574D,118

Overview

The Nexperia 74AHCT574D,118 is an octal D-type flip-flop with 3-state outputs belonging to the AHCT logic family. It operates on a single supply voltage ranging from 4.5 V to 5.5 V. The device features positive-edge triggering and includes dedicated clock (CP) and output enable (OE) inputs for bus-oriented applications. Packaged in a 20-SO surface-mount housing, it supports high-speed data storage with a maximum propagation delay of 10.6 ns at 5 V with 50 pF load. Static current consumption is specified at 4 µA, ensuring low power operation within its designated voltage range.

Feature Summary

• Octal D-type flip-flop architecture with positive-edge clock triggering
• Three-state outputs controlled by a common output enable input
• AHCT series compatibility providing TTL-compatible input levels
• Surface-mount packaging designed for automated assembly processes

Applications

• Bus-oriented data storage systems requiring tri-state control
• Parallel-to-serial conversion circuits utilizing clocked latching
• Microprocessor interface modules for temporary data holding
• Digital signal processing stages requiring edge-triggered state retention

Procurement Notes

Verify the complete part number including the trailing suffix to confirm package type and tape/reel specifications. Confirm that the operating environment remains within the specified 4.5 V to 5.5 V supply range. Ensure thermal management aligns with the -40°C to +125°C ambient temperature rating. Cross-reference datasheet revisions to account for any recent manufacturing or labeling changes documented in product change notifications.

Selection Notes

Select this component when TTL-level interfacing is required alongside high-speed CMOS performance. The AHCT series bridges the gap between older TTL standards and modern low-power designs. Consider the 20-SO package dimensions for PCB layout constraints. Evaluate the 10.6 ns propagation delay against system timing requirements. Verify that the 8 mA output drive capability meets the load requirements of connected circuitry without exceeding electrical limits.

Part Context

This component belongs to the widely adopted 74-series logic family, specifically the advanced high-speed CMOS technology with CMOS compatible inputs and TTL compatible outputs. The 74AHCT574 variant serves as a standard solution for digital design engineers needing reliable octal storage elements. Its integration into the broader Nexperia portfolio ensures availability across various industrial and commercial sectors requiring standardized logic functions.

Replacement Considerations

Direct functional equivalents include the 74AHC574D,118, which offers similar performance but requires a wider 2V to 5.5V supply range rather than the strict 4.5V to 5.5V requirement of the AHCT version. Designers must verify input voltage thresholds when substituting between HC and HCT families to ensure proper logic level recognition.