74LCX112MTC

Overview

The Fairchild Semiconductor 74LCX112MTC is a dual J-K flip-flop integrated circuit designed for low-voltage digital applications. It operates within a supply voltage range of 2V to 5.5V and features 5V tolerant inputs, allowing compatibility with various logic families. The device is housed in a 16-TSSOP surface-mount package with a width of 4.40mm. Each flip-flop includes independent J, K, PRESET, CLEAR, and CLOCK inputs along with Q and Q outputs. It supports negative edge triggering and offers a maximum propagation delay of 7.5ns at 3.3V.

Feature Summary

• Dual J-K flip-flop architecture with independent control inputs
• 5V tolerant input structure for mixed-voltage system integration
• Negative edge-triggered operation for precise timing control

Applications

• Digital data storage and register circuits
• Frequency division and counter designs
• State machine implementation in low-voltage systems

Procurement Notes

Verify the manufacturer marking on the component body to confirm it matches Fairchild Semiconductor or ON Semiconductor branding. Ensure the package code corresponds to the 16-TSSOP form factor. Check for any suffix variations that may indicate tape-and-reel packaging versus bulk, as this affects handling procedures. Confirm the operating temperature range meets your specific environmental requirements before finalizing procurement.

Selection Notes

Select this component when a dual J-K flip-flop is required for low-power, high-speed applications. The 5V tolerant inputs make it suitable for interfacing between 3.3V logic cores and legacy 5V peripherals. Consider the 16-TSSOP package for space-constrained PCB layouts. Ensure the design accounts for the negative edge-triggering characteristic to synchronize clock signals correctly within the target circuit topology.

Part Context

This part belongs to the 74LCX series, which utilizes CMOS technology optimized for low voltage and low power consumption. The LCX family is known for its high speed and compatibility with both 3.3V and 5V systems. The 74LCX112 specifically provides two independent J-K flip-flops, offering a compact solution for sequential logic functions compared to discrete transistor implementations.

Replacement Considerations

Compatible substitutes include the 74LCX112MTCX and 74LCX112MX from the same manufacturer. Other equivalents may include parts from the 74LVC or 74AHC families, provided they support J-K functionality and compatible voltage levels. Verify pinout compatibility and electrical specifications before substitution.