7473 JK Flip-Flop IC Dual Negative-Edge Triggered with Clear

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

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)