These dual flip-flops are designed so that when the clock goes HIGH, the inputs are enabled and data will be accepted. Connected to the ground of the system. These pins must be provided with clock pulse for the flip flop. Preset input pin drives Flip Flop to a set state. Another Input pin of the Flip Flop.
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JK flip flops are widely used in daily electronics devices by many methods but the basic operation of the JK flip flop is to store a bit. JK flip flop allows to store a bit and then allows it to use for further functions.
JK flip flop is one of the popular flip flops due to its clock input, pre-set, and clear functionalities. The JK flip-flop changes its state under the clock pulse signal. The clock signal can be either a positive edge or a negative edge.
The clock pulse gives multiple advantages to the flip flop. JK flip flops can be designed by manually using simple gates but to avoid circuit complexity the 74LS76 gives the advantages to use two JK flip flops at the same time. The JK flip flop in this IC also has a preset and clear function which allows the IC to bypass the clock and inputs and give the different outputs.
The IC comes in multiple packages that make the IC use any hardware according to the requirement. The multiple IC can be used to make further ICs in case of necessary. The output will be depending on almost every input pin. Now the other input pin knows as preset. The reset pin and clear will have these states at different inputs.
The output will be depending on the previous state. The other states will be according to the following truth table. The above two tables explain the general working of JK FF, this truth table depicts the functionality of 74LS76 with clear and preset features. In this example, we are going to build a 3-bit counter using JK flip flop and then we will show the value by converting it to decimal on the 7-segment.
To design a three-bit counter we will need an extra component which is AND gate and then we will use four JK flip flops. After designing the bit counter, we will use the IC 74LS76 to convert the binary data to common cathode 7-segment. The clock pulse will generate the output and IC will show the data on the 7-segment. In three bits of data, we can store to data which is eight values. And 7 segments are showing value from 0 to 7 in decimal.
The JK flip flop storing each and every value and generating the new values on each clock pulse. We can receive the value any time before the clock pulse changes. In microprocessors and controller, the clock pins are controlled by manual signals to replace the data until then the data remains store and this process makes the flip flop best for temporary data storage in multiple devices.
If you want further information on Electrical specification, 2D diagram, you can download the datasheet here:. Download DataSheet. Notify me of follow-up comments by email. Notify me of new posts by email. Table of Contents. Pin 1 is an input pin.
It is used to give the clock pulse to the first JK flip flop. Pin 2 is a preset input pin. Pin 3 is a clear input pin of the first flip flop.
It is used to reset the output of first flip flop. Pin 4 is the first input pin of the first flip flop. It is used to give the first input data bit to the IC. Pin 6 is an input pin. It is used to give the clock pulse to the clock of the second JK flip flop. Pin 7 is a preset input pin of the second flip flop. Pin 8 is a clear input pin of the second flip flop. It is used to reset the output of second flip flop. Pin 9 is the first input pin of the second flip flop.
Pin 10 is the second output pin of the second flip flop. It will give the inverted output of Pin Pin 11 is the first output pin of the second first flop. It will give the output bit of the second flip flop.
Pin 12 is the second input pin of the second flip flop. It is used to give the second input data bit to the IC. Pin 13 is a ground pin. Pin 14 is the second output pin of the first flip flop. Pin 15 is the first output pin of the first flip flop. It will give the output bit of the first flip flop.
Pin 16 is the second input pin of the first flip flop.
74LS76 Dual J-K Flip-Flops with preset and clear function