74ACQ574SC

Overview

The onsemi 74ACQ574SC is an octal D-type flip-flop featuring three-state outputs, manufactured using advanced silicon gate CMOS technology. It operates within a supply voltage range of 2.0 V to 6.0 V and supports data rates up to 100 MHz. The device provides high noise immunity and low power consumption typical of AC/ACT logic families. Packaged in a 20-pin SOIC format, it includes eight D inputs and corresponding Q outputs with independent output enable controls for bus-oriented memory mapping applications.

Feature Summary

• Octal D-type flip-flop architecture with three-state outputs
• Advanced silicon gate CMOS construction for high speed and low power
• Compatible with standard TTL logic levels across wide voltage ranges

Applications

• Bus-oriented memory systems requiring parallel data storage
• Register files in digital signal processing architectures
• High-speed data buffering in communication interfaces

Procurement Notes

Verify component authenticity through authorized channels as this part is obsolete. Confirm package integrity and pin alignment against original datasheets. Check for RoHS compliance status if required by current assembly standards. Ensure replacement strategies account for end-of-life manufacturing constraints and potential lead time variations from secondary suppliers.

Selection Notes

Select this component when designing systems requiring octal latching with tri-state control. Compare propagation delays and output drive capabilities against system timing requirements. Evaluate thermal performance under maximum load conditions. Consider alternative active parts if long-term supply stability is critical for production continuity.

Part Context

This device belongs to the 74ACQ series, representing high-speed CMOS logic optimized for complex digital designs. It complements other octal registers in the family, offering balanced performance between speed and power efficiency. The SOIC-20 package facilitates surface-mount assembly in compact electronic devices requiring multiple synchronized data storage elements.

Replacement Considerations

MC74AC574DWG is listed as a parametric equivalent substitute.