74VHCT574AMTC

Overview

The Fairchild Semiconductor 74VHCT574AMTC is an octal D-type flip-flop featuring positive-edge triggering and three-state outputs. It operates within a supply voltage range of 4.5V to 5.5V, ensuring compatibility with standard CMOS logic systems. The device incorporates a high-impedance state controlled by the Output Enable (OE) input, allowing for effective bus-oriented applications without internal operation interference. Designed for surface-mount installation, it utilizes a 20-TSSOP package with dimensions of 0.173 inches in width. The component supports a maximum clock frequency of 130 MHz and exhibits a typical propagation delay of 10.4 ns at 5V with a 50 pF load. It maintains low static current consumption of 4 µA and provides output drive capabilities of 8 mA for both high and low states.

Feature Summary

• Octal D-type flip-flop architecture with positive-edge triggering mechanism
• Three-state non-inverting outputs suitable for bus-oriented applications
• CMOS technology providing low power consumption characteristics
• High-speed performance with 130 MHz clock frequency capability

Applications

• Bus-oriented memory register implementations
• High-speed data storage circuits
• Parallel-to-serial conversion modules
• General-purpose digital logic buffering

Procurement Notes

Verify the specific manufacturer designation, as onsemi acquired Fairchild's semiconductor operations. Confirm that the part number corresponds to the original Fairchild specifications or the subsequent onsemi equivalent documentation. Ensure the package type matches the required 20-TSSOP form factor and validate RoHS compliance status against current regulatory requirements before finalizing procurement orders.

Selection Notes

Select this component when designing systems requiring octal data latching with tri-state control. It is appropriate for applications demanding high-speed operation up to 130 MHz and precise timing with minimal propagation delay. Consider its 4.5V to 5.5V operating range for standard 5V logic interfaces. Evaluate the 20-TSSOP package constraints for PCB layout and thermal management requirements in dense surface-mount designs.

Part Context

This device belongs to the VHCT logic family, which combines CMOS speed with TTL-compatible inputs. It serves as a critical element in sequential logic design, offering reliable edge-triggered data capture. The 74VHCT574 series is widely utilized in communication systems and computing hardware where synchronized data transfer and high-density integration are essential for maintaining system integrity and performance standards.

Replacement Considerations

The MM74HCT574MTC from onsemi offers similar functionality but may differ in electrical parameters such as propagation delay and drive strength. Verify pinout compatibility and ensure voltage thresholds align with the target circuit design before substituting components.