74VHC74N

Overview

The 74VHC74N is a dual D-type flip-flop manufactured by Fairchild Semiconductor, now part of onsemi. It operates within a supply voltage range of 2V to 5.5V and features positive-edge triggering with set (preset) and reset functions. The device utilizes a 14-pin MDIP package and supports a maximum clock frequency of 115 MHz. Key electrical parameters include a typical propagation delay of 9.3ns at 5V with 50pF load, output currents of 8mA for both high and low states, and a maximum static current of 2µA.

Feature Summary

• Dual D-type flip-flops with positive-edge triggering
• Integrated set and reset control functions
• High-speed operation compatible with Bipolar Schottky TTL performance levels

Applications

• Parallel-to-serial data conversion circuits
• Shift register configurations
• General-purpose digital storage elements

Procurement Notes

Verify the manufacturer status carefully as this component is marked as obsolete and no longer in production. Confirm if the listing refers to original Fairchild stock or an onsemi equivalent, noting that Fairchild has been integrated into onsemi. Ensure the specific ordering suffix matches the required package type and compliance standards before finalizing any procurement actions.

Selection Notes

Select this component only if legacy DIP packaging is strictly required for the design. Consider modern alternatives from ON Semiconductor or Texas Instruments that offer active status and improved availability. Evaluate whether the VHC series speed and power characteristics meet the system requirements compared to standard HC or HCT logic families.

Part Context

This device belongs to the 74VHC logic family, which provides advanced high-speed CMOS technology. It maintains pin and function compatibility with the standard 74HC74 while offering faster switching speeds. The product line represents a transition period where Fairchild Semiconductor branding was used prior to full integration into ON Semiconductor systems.

Replacement Considerations

Direct substitutes include SN74AHC74N and SN74HC74N from Texas Instruments. These components provide functional equivalence and are currently available through major distributors.