74LCX74SJX

Overview

The Fairchild Semiconductor 74LCX74SJX is a dual D-type flip-flop featuring asynchronous clear and set inputs with complementary Q and Q outputs. It operates within a supply voltage range of 2 V to 3.6 V and supports data rates up to 100 MHz. The device is housed in a 14-SOIC package (5.30 mm width) and functions reliably across an industrial temperature range of -40°C to +85°C.

Feature Summary

• Dual D-type flip-flop architecture with asynchronous clear and set control inputs
• Complementary Q and Q outputs for versatile logic interfacing
• High-speed operation supporting data rates up to 100 MHz
• Wide operating voltage range from 2 V to 3.6 V

Applications

• Parallel-to-serial data conversion circuits
• Shift register implementations
• Timing delay elements in digital systems
• General-purpose storage applications in consumer electronics

Procurement Notes

Verify the manufacturer designation, as Fairchild Semiconductor's logic division was acquired by ON Semiconductor. Ensure the ordering suffix matches the specific tape-and-reel or tube packaging requirements for your assembly line. Confirm that the 14-SOIC footprint aligns with your PCB design guidelines before finalizing procurement orders.

Selection Notes

Select this component when a dual D-type flip-flop with independent set and clear controls is required. It is suitable for designs needing high-speed performance at low voltages. Consider the 14-SOIC package size for space-constrained layouts. Verify compatibility with your system's voltage levels and signal integrity requirements.

Part Context

This part belongs to the 74LCX series, designed for low-voltage CMOS applications. It provides a drop-in replacement for older 74HC or 74HCT logic families while offering improved power efficiency and speed. The series is widely used in portable and battery-operated devices requiring reliable digital logic functions.

Replacement Considerations

Check for equivalents such as the 74LCX74SJ or other dual D-flip-flops in the same series. Ensure pinout compatibility and electrical specifications match your circuit design before substituting.