74LVQ74SC

Overview

The Fairchild Semiconductor 74LVQ74SC is a low-voltage dual D-type positive edge-triggered flip-flop featuring asynchronous clear and set inputs with complementary outputs. It operates within a voltage range of 2V to 5.5V, supporting logic levels across standard interfaces. The device is housed in a 16-pin SOIC package, designed for surface-mount applications. It ensures reliable data storage and transfer in digital systems, maintaining signal integrity under varying supply conditions while adhering to strict timing specifications for synchronous operations.

Feature Summary

• Dual independent D-type flip-flops with positive edge triggering
• Asynchronous clear and set inputs for immediate state control
• Complementary Q and Q outputs for versatile logic interfacing
• Low-voltage operation compatible with 2V to 5.5V supply rails

Applications

• Data storage registers in microcontroller systems
• Shift register configurations for serial-to-parallel conversion
• State machine implementation in digital logic circuits
• Memory buffer stages in communication interfaces

Procurement Notes

Verify component authenticity through authorized distributors or manufacturer channels. Confirm RoHS compliance status and check for obsolescence notices, as legacy parts may have limited availability. Ensure packaging matches specified SOIC-16 requirements. Review datasheet revisions for any updates to electrical characteristics or pin assignments before integration into production designs.

Selection Notes

Select this component for applications requiring dual flip-flops with asynchronous control in low-voltage environments. Consider the 16-pin SOIC package for space-constrained PCB layouts. Evaluate timing parameters against system clock speeds to ensure setup and hold time compliance. Compare power consumption metrics with alternative logic families if energy efficiency is critical for the target application.

Part Context

Part of the 74LVQ series, which provides low-voltage CMOS performance with TTL-compatible inputs. This series bridges older logic standards with modern low-power requirements. The SC suffix indicates a specific tape-and-reel or tube packaging variant suitable for automated assembly processes, ensuring consistent handling during high-volume manufacturing operations.

Replacement Considerations

Direct substitutes include MC74LVQ74D from onsemi or SN74LVQ74PW from Texas Instruments. Verify pin compatibility and electrical specifications match exactly. Check for equivalent asynchronous control features and output drive capabilities. Confirm package dimensions align with existing footprints to avoid rework during replacement.