74LCX74SJ

Overview

The Fairchild Semiconductor 74LCX74SJ is a dual D-type positive edge-triggered flip-flop featuring asynchronous clear and set inputs with complementary Q and Q outputs. It operates within a supply voltage range of 2V to 5.5V, ensuring compatibility with low-voltage systems while maintaining 5V tolerant inputs. The device is housed in a 14-SOIC package, designed for surface-mount installation. It supports a wide operating temperature range from -40°C to +85°C, making it suitable for diverse environmental conditions.

Feature Summary

• Dual D-type flip-flop architecture with positive edge triggering
• Asynchronous clear and set inputs for immediate state control
• Complementary Q and Q outputs for versatile logic interfacing
• 5V tolerant inputs compatible with mixed-voltage system designs

Applications

• Data storage and register applications in digital circuits
• State machine implementation in embedded systems
• Synchronization of signals between different voltage domains
• Timing control and pulse generation in communication interfaces

Procurement Notes

Verify the specific suffix 'SJ' corresponds to the 14-SOIC package variant when sourcing. Confirm that the manufacturer designation aligns with current ownership structures following industry consolidations. Ensure that the component meets the required RoHS compliance standards for your target market. Cross-reference the datasheet revision date to guarantee accurate electrical characteristics are applied during design validation.

Selection Notes

Select this component when a dual flip-flop solution with independent set and clear functions is required. The 5V tolerant input feature makes it ideal for interfacing with legacy 5V logic families while operating at lower core voltages. Consider the 14-SOIC package dimensions for PCB layout constraints. Evaluate the propagation delay specifications against your system's timing requirements to ensure signal integrity.

Part Context

The 74LCX74SJ belongs to the 74LCX series, which represents low-voltage CMOS technology optimized for high-speed performance. This series is characterized by its ability to operate across a broad voltage spectrum, bridging the gap between traditional 5V logic and modern 3.3V or 2.5V systems. The SJ suffix typically denotes a specific package configuration within the broader product family.

Replacement Considerations

The 74LCX74SJX is a documented equivalent part number offering identical logical functionality. Verify that the alternative package type matches your board space requirements. Ensure that the replacement maintains the same asynchronous control features and voltage tolerance levels.