74ACQ374PC

Overview

The 74ACQ374PC is an octal D-type flip-flop manufactured by onsemi (formerly Fairchild Semiconductor). It features eight positive-edge-triggered D-type inputs and three-state outputs, designed for bus-oriented applications. The device operates within a supply voltage range of 2V to 6V. Key electrical parameters include a maximum propagation delay of 8.5ns at 5V with a 50pF load, a clock frequency of 90MHz, and output drive capabilities of 24mA source/sink current. Static power consumption is specified at 40µA. The component is housed in a 20-PDIP package.

Feature Summary

• Octal D-type flip-flop architecture with separate data inputs for each bit
• Three-state outputs enabling efficient bus-oriented system designs
• Positive edge-triggered clocking mechanism for precise timing control
• TTL-compatible input logic levels for broad interface compatibility

Applications

• Bus-oriented register storage systems
• High-speed data latching circuits
• Parallel-to-serial conversion interfaces
• General-purpose memory buffer applications

Procurement Notes

Verify the manufacturer designation carefully, as onsemi acquired Fairchild Semiconductor's logic business. Confirm the specific suffix 'PC' corresponds to the 20-pin PDIP package variant. Check RoHS compliance status against the specific production batch, as older Fairchild stock may differ from current onsemi specifications. Ensure the component matches the 74ACQ series requirements rather than standard AC or ACT variants.

Selection Notes

Select this component when an octal flip-flop with three-state outputs is required for bus architectures. The 74ACQ series offers high-speed performance comparable to bipolar TTL while maintaining CMOS low power dissipation. Consider the 2V to 6V operating range for flexibility in various voltage domains. Verify that the 8.5ns propagation delay meets the system timing constraints.

Part Context

This part belongs to the 74ACQ family, which represents advanced CMOS technology optimized for speed and power efficiency. The 74ACQ374 is functionally similar to the standard 74AC374 but may feature specific manufacturing process variations associated with the Q-series designation. It serves as a core building block for digital logic systems requiring parallel data storage and controlled output driving.

Replacement Considerations

Public confirmed substitute part numbers include CD74AC374E from Texas Instruments and SN74AC374N from Texas Instruments. These alternatives offer pin-compatible replacements for the 74ACQ374PC. Verify that the substitute components meet the same 2V to 6V supply voltage and 24mA output current specifications before integration.