Dual JK Flip Flop 7473

The Dual JK Flip Flop 7473 is a TTL logic IC from the 74xx family that contains two independent JK flip-flops, each with its own clock and active-low clear input. It is used to build counters, frequency dividers and simple memory circuits, and it is a standard part in digital electronics labs for learning how sequential logic works.

Dual JK Flip Flop 7473 Specifications

• Function: 2 independent JK flip-flops
• Inputs per flip-flop: J, K, clock (CLK) and clear (CLR, active low)
• Outputs per flip-flop: Q and inverted Q
• Clocking: outputs change on the falling (high-to-low) edge of the clock
• Truth table: J=0 K=0 hold, J=1 K=0 set, J=0 K=1 reset, J=1 K=1 toggle
• Supply voltage: 5 V
• Pins: 14, with VCC on pin 4 and GND on pin 11

Dual JK Flip Flop 7473 Applications

• Binary ripple counters
• Frequency dividers (each flip-flop in toggle mode divides by 2)
• Shift registers and sequence generators
• Digital logic lab experiments for students

What's in the Box

• 1 × 7473 dual JK flip-flop IC

Tip: Unlike most 74xx chips, the 7473 has its power on pin 4 (VCC) and pin 11 (GND), so check the pinout before wiring. Tie J and K high for toggle mode and keep the CLR inputs high during normal operation; this chip has no preset input.

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