74LS109 IC Dual J-K flip-flop with set and reset
The 74LS109 is a dual J-K flip-flop IC commonly used for digital data storage, frequency division, counters, and sequential logic circuits.
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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:
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