74VHCT74AMX

Overview

The Fairchild Semiconductor 74VHCT74AMX is a dual D-type flip-flop fabricated with advanced silicon-gate CMOS technology. It features differential outputs and operates within a 4.5 V to 5.5 V power supply range. The device is housed in a 14-pin SOIC package (0.154 inch, 3.90 mm width). It provides independent data, preset, clear, and clock inputs alongside Q and Q-bar outputs.

Feature Summary

• Advanced silicon-gate CMOS fabrication for high-speed operation comparable to LS-TTL equivalents
• Differential output configuration for enhanced signal integrity
• Independent asynchronous preset and clear functions not synchronized to the clock

Applications

• Digital data storage circuits requiring dual bit retention
• Synchronous state machine implementations
• High-speed logic interfacing between CMOS and TTL domains

Procurement Notes

Verify the specific suffix 'AMX' against the manufacturer's current datasheet to confirm pinout compatibility and electrical specifications. Ensure the component matches the required 14-pin SOIC form factor and voltage range for your design integration.

Selection Notes

Select this component when differential outputs are required for dual D-type flip-flops in a 5V system. It serves as a high-speed alternative to standard HC or HCT families while maintaining CMOS low power characteristics and TTL-compatible input thresholds.

Part Context

This part belongs to the VHCT family, which bridges the speed of advanced CMOS with the noise immunity and drive capability of bipolar TTL. It is functionally compatible with other 74-series logic devices but offers superior switching speeds suitable for demanding digital applications.

Replacement Considerations

Check for direct substitutes such as the MM74HC74AMX from ON Semiconductor, noting that HC variants may differ in propagation delay and output drive strength compared to the VHCT series.