Overview
The 7473 JK Flip-Flop IC is a high-speed CMOS/TTL-compatible integrated circuit containing two independent JK flip-flops with individual J, K, clock, and direct clear (reset) inputs. Unlike the simpler SR flip-flop, the JK design eliminates “invalid states”—when both J and K are high, the output simply toggles. This makes it the most versatile flip-flop for creating binary counters, digital clocks, and state machines in university projects and industrial logic circuits.
Key Features
Dual Independent Flip-Flops: Two separate circuits in a single 14-pin package to save space on your breadboard.
Negative-Edge Triggered: The state changes exactly when the clock pulse goes from High to Low, providing precise timing control.
Toggle Mode: Easily create frequency dividers by pulling both J and K pins High.
Direct Clear (Reset): An asynchronous clear pin allows you to reset the output to zero instantly, regardless of the clock signal.
TTL Compatibility: Works perfectly with standard 5V logic systems (Arduino, 8051, etc.).
Technical Specifications
| Feature | Specification |
| Logic Family | 74LS (Low-power Schottky TTL) |
| Supply Voltage (V_{CC}) | 4.75V to 5.25V (Standard 5V) |
| Package Type | DIP-14 (Dual In-line Package) |
| Propagation Delay | ~15ns to 20ns |
| Operating Temperature | 0°C to 70°C |
| Input Type | Bipolar / TTL |
| Output Current | 8mA (Max) |
JK Flip-Flop Truth Table
J=0, K=0: No Change (Holds Memory)
J=0, K=1: Reset (Output = 0)
J=1, K=0: Set (Output = 1)
J=1, K=1: Toggle (Flips the previous state)
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