74LS109 IC Dual J-K flip-flop with set and reset

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74LS109 IC Dual J-K flip-flop with set and reset The 74LS109 is a dual positive-edge-triggered J-K flip-flop integrated circuit from the 74LS TTL logic family. It contains two independent flip-flops that respond to the rising edge of their respective clock signals. Each flip-flop has J and K inputs that control its output state, making it suitable for storing digital states and implementing sequential logic functions. The IC includes asynchronous preset and clear inputs that allow the outputs to be set or reset independently of the clock. Complementary outputs provide both normal and inverted logic signals for use in digital systems. The 74LS109 is suitable for counters, frequency dividers, control circuits, and digital state machines. Its 16-pin DIP package supports through-hole mounting for prototyping and PCB assembly. Features: Two independent J-K flip-flops. Positive-edge-triggered clock operation. Asynchronous preset and clear functions. Complementary outputs for each flip-flop. Toggle operation for sequential logic applications. TTL-compatible logic. Suitable for digital storage and control circuits. Through-hole DIP package. Specifications: Parameter Value IC Type Dual J-K Flip-Flop Logic Family 74LS TTL Number of Flip-Flops 2 Trigger Type Positive-edge-triggered Inputs J, K, Clock, Preset, Clear Outputs Q and complementary Q̅ per flip-flop Preset Asynchronous, active LOW Clear Asynchronous, active LOW Nominal Supply Voltage 5V Recommended Supply Voltage 4.75V to 5.25V Typical Supply Current 4mA Maximum Supply Current 8mA Maximum Clock Frequency 25MHz under specified test conditions Operating Temperature 0°C to 70°C Package PDIP-16 / DIP-16 Number of Pins 16 Mounting Type Through-Hole Pinout: Applications: Digital counters. Frequency divider circuits. Sequential logic systems. Digital state machines. Data storage and synchronization. Toggle and switching circuits. Timing and control systems. Educational electronics projects. Packages Included: 1 × 74LS109 IC Dual J-K flip-flop with set and reset. Documents: 74LS109 datasheet