7476 IC Dual JK Flip-Flop with Preset & Clear
The IC 7476 contains two independent JK flip-flops, each with a clock input, asynchronous preset and clear, and complementary outputs (Q and Q̅). It operates on positive-edge clocking, meaning it responds to the rising edge of the clock signal.
Each flip-flop toggles, sets, or resets based on the logic levels at the J and K inputs. The preset input sets Q to HIGH, while the clear input sets Q to LOW, regardless of the clock or other inputs. These asynchronous controls allow immediate output changes, which are useful in initializing or overriding logic states.
Engineers use this IC in counters, frequency dividers, control circuits, and memory elements. Its TTL-compatible design makes it easy to integrate into standard logic systems.
Key Features
Contains two JK flip-flops per chip
Positive-edge triggered clock input
Provides preset and clear for each flip-flop
Outputs both Q and Q̅ for each stage
TTL voltage level compatible
Useful for toggling, storing, and dividing signals
Compact 16-pin DIP or SOIC package
Ideal for use in sequential logic circuits
Applications
Store single-bit data in sequential digital circuits.
Build toggle-based counters and frequency dividers.
Design simple memory storage or register circuits.
Create control logic for state machines or timers.
Use preset and clear to manage startup conditions.
Divide clock signals for timing-based applications.
Control outputs based on flip-flop toggling.
Implement binary counting or sequence generation.
Design edge-sensitive control logic.
Support timing delay or synchronization functions.
Specifications Table
| Parameter | Value |
|---|---|
| Logic Family | TTL |
| Number of Flip-Flops | 2 (Dual) |
| Input Type | J, K, CLK, PRE, CLR |
| Output Type | Q, Q̅ |
| Triggering Type | Positive-edge |
| Preset & Clear | Asynchronous |
| Supply Voltage (Vcc) | 4.75V to 5.25V |
| Typical Operating Voltage | 5V ‘ |
| Input HIGH Voltage | ≥ 2.0V |
| Input LOW Voltage | ≤ 0.8V |
| Output HIGH Voltage | ≥ 2.4V |
| Output LOW Voltage | ≤ 0.4V |
| Max Clock Frequency | ~35 MHz (typical) |
| Propagation Delay | ~30 ns |
| Package Type | DIP-16 / SOIC-16 |
| Operating Temperature | 0°C to 70°C |
