74HC73 Dual J-K Flip-Flop with Reset IC - 14-Pin DIP Package

When your digital circuit needs a memory element that can do more than just latch a single bit of data, the 74HC73 is the classic hardware solution. This 14-pin integrated circuit contains two completely independent J-K flip-flops. While a standard D-type flip-flop only stores whatever is on its input, a J-K flip-flop has two control inputs (J and K) that give it four distinct modes of operation. Depending on how you set the J and K pins, the chip can hold its current state, force the output High, force the output Low, or completely toggle its output back and forth every time a clock pulse arrives.

Each flip-flop inside the 74HC73 is negative-edge triggered, meaning the chip updates its output exactly when the clock signal transitions from a High state down to a Low state. Additionally, each flip-flop features a dedicated, active-Low Reset pin. Pulling this pin to Ground instantly wipes the output back to zero, ignoring the clock and the J-K inputs entirely, which is essential for safely initializing a circuit when power is first turned on.

Key Features & Functional Advantages

• Dual Independent Flip-Flops: Packs two separate J-K memory circuits into a single 14-pin footprint, saving valuable space on your circuit board.

• Four-Mode Logic Control: The J and K inputs allow the chip to hold, set, reset, or toggle its output, making it highly adaptable for complex hardware state machines.

• Negative-Edge Triggered: Synchronizes logic updates precisely on the falling edge of your system clock.

• Asynchronous Reset: Features a dedicated clear pin for each flip-flop that instantly forces the outputs to a Low state for safety and initialization.

• High-Speed CMOS Architecture: Operates with blistering nanosecond switching speeds while drawing virtually zero idle current across a 2.0V to 6.0V range.

Perfect For

• Custom Frequency Dividers: By tying both the J and K inputs High, the chip turns into a toggle flip-flop, perfectly dividing an incoming clock frequency exactly in half.

• Hardware State Machines: The absolute fundamental building block for designing custom sequencers and logic controllers without writing microcontroller code.

• Ripple Counters: Easily cascaded together to build custom binary up or down counters.

• Pushbutton Toggles: Excellent for converting a momentary pushbutton press into a push-on, push-off maintained switch when paired with a debouncing circuit.

Technical Specifications

• Logic Family: 74HC High-Speed CMOS

• Logic Function: Dual J-K Flip-Flop with Reset

• Trigger Type: Negative-Edge (High-to-Low transition)

• Output Configuration: Standard Q and Inverted Not-Q outputs

• Operating Supply Voltage: 2.0V to 6.0V DC

• Package Case: 14-DIP 0.300 inch width

• Mounting Type: Through-Hole

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