Description

The 7476 Dual J-K Flip-Flop is a high-performance digital integrated circuit from the renowned 7400 TTL logic family. This IC includes two independent J-K flip-flops, each with individual clock, preset, clear, and complementary outputs. Designed for positive-edge triggering, the 7476 provides reliable data storage and signal synchronization in sequential logic systems. Packaged in a standard 14-pin Dual In-Line Package (DIP), this IC is ideal for counters, frequency dividers, shift registers, and various digital control applications.

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⚙️ Key Features:

• Dual J-K Flip-Flops: Contains two independent, fully functional flip-flops in one package.

• Asynchronous Preset and Clear Inputs: Instantly set or reset outputs, independent of the clock.

• Edge-Triggered Operation: Responds to the clock’s transition, reducing timing ambiguity.

• Complementary Outputs (Q and Q’): Simplifies design by providing both logic states.

• TTL Compatible: Works seamlessly with other 7400 series ICs and TTL-based systems.

• Standard 14-Pin DIP Package: Easy to use on breadboards, perfboards, or PCBs.

• Reliable Operation: Offers stable performance, fast switching, and minimal propagation delay.

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🧠 How It Works:

The 7476 J-K flip-flop functions as a bistable multivibrator, meaning it has two stable output states — HIGH (1) and LOW (0). It captures data based on the inputs J, K, and the clock signal. The outputs can be preset or cleared asynchronously, independent of the clock pulse, giving designers flexibility in initializing or resetting their circuits.

The logic behavior follows the truth table below:

When the clock signal transitions from LOW to HIGH (positive edge), the flip-flop reads the J and K inputs and updates the Q output accordingly.

Preset (PR) and Clear (CLR) are asynchronous inputs:

• Preset (active LOW): Forces Q = 1 and Q’ = 0.

• Clear (active LOW): Forces Q = 0 and Q’ = 1.
  If both are LOW simultaneously, the output state becomes invalid (not recommended).

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🧩 Pin Configuration (DIP-14):

1. 1CLR – Asynchronous Clear (active LOW) for Flip-Flop 1

2. 1K – K Input for Flip-Flop 1

3. 1CLK – Clock Input for Flip-Flop 1

4. 1J – J Input for Flip-Flop 1

5. 1PR – Preset (active LOW) for Flip-Flop 1

6. 1Q – Output Q for Flip-Flop 1

7. 1Q’ – Complement Output Q’ for Flip-Flop 1

8. 2Q’ – Complement Output Q’ for Flip-Flop 2

9. 2Q – Output Q for Flip-Flop 2

10. 2PR – Preset (active LOW) for Flip-Flop 2

11. 2J – J Input for Flip-Flop 2

12. 2CLK – Clock Input for Flip-Flop 2

13. 2K – K Input for Flip-Flop 2

14. 2CLR – Asynchronous Clear (active LOW) for Flip-Flop 2

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⚡ Electrical Characteristics:

• Operating Voltage: 4.75V to 5.25V (typical 5V)

• Input High Voltage (VIH): 2.0V min

• Input Low Voltage (VIL): 0.8V max

• Output Current (IOL/IOH): ±8 mA typical

• Propagation Delay: 20ns (typical)

• Power Dissipation: 100 mW typical

• Logic Family: TTL

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🛠️ Applications:

• Counters and frequency dividers

• Digital memory storage elements

• Shift registers and data latches

• Control circuits in digital systems

• Sequential logic and state machines

• Clock pulse synchronization

• Educational and experimental digital kits

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💡 Why Choose the 7476 DIP J-K Flip-Flop?

The 7476 is one of the most widely used flip-flops in sequential logic design due to its flexibility and robust performance. Its ability to toggle, set, reset, and retain state makes it a foundational component for constructing reliable digital systems. The inclusion of asynchronous preset and clear inputs allows direct control of initial states, a key advantage in timing and control applications.

This IC is perfect for students, educators, and engineers looking to build or prototype circuits involving data storage, signal timing, and synchronization. Its breadboard-friendly DIP-14 package ensures easy integration into both academic and industrial environments.

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📦 Package Includes:

• 1 × 7476 Dual J-K Flip-Flop (DIP-14)

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📘 Summary:

The 7476 Dual J-K Flip-Flop is an essential logic IC that offers versatility, precision, and reliability in digital circuit design. With its dual flip-flop configuration, edge-triggered operation, and independent preset/clear control, it provides a powerful foundation for creating counters, dividers, and sequential logic systems. Whether for learning or professional applications, the 7476 remains a trusted component in the field of digital electronics.

7476 J-K Flip Flop Truth table:7476 J-K Flip Flop Datasheet