CD4022 DATASHEET PDF

Where to use CD IC The IC CD is used for counting applications, it has the capability to turn on 10 outputs sequentially in a pre-defined time and reset the count or hold it when required. It also has the capability to indicate the status of counting using Carry pin. We have 10 output pins ranging from Q0 to Q9, these pins can be connected to any load but we are using LEDs here as shown in the circuit below. This IC will increment the count from 0 to 9 Q0 to Q9 each time it senses a high pulse from the clock pin pin

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The IC CD is an octal decoded sequential counter. It turns on 8 decoded outputs in a sequential manner on every positive edge of a clock. It is used in multi-device counting chains to ripple-clock the succeeding device.

You can use this IC for counting applications and in devices that are performing arithmetic operations. This IC is best for applications that require sequential counting. How to use it This IC is very easy to use. The clock pulse is provided through a timer IC or a switch button. On every positive transition of a clock pulse, the counter value increments by 1 in a sequential manner.

The clock inhibits pin inhibits the clock signal. When it is HIGH, the counter value will not increment, and it will inhibit the clock signal. For normal operation, it is connected to the ground.

After 10 counts, the carryout pin will go and remain in that condition for 4 counts after that it will go into the LOW state again. It is also used to indicate the status of counting. The reset pin is used to restart the counting from the beginning.

If you want to reset the counter value, apply HIGH logic at this pin. This is an example connection diagram.

Now, Connect the eight decoded outputs with LEDs. Connect Vss to the ground and Vdd with the power supply. Switch ON the power supply. The timing diagram given below explains the behavior of eight outputs on applying different combinations of values at inputs.

Example Circuits This example shows a proteus simulation circuit with a clock source from a timer IC. You can change the frequency of timer by changing the values of resistors and capacitors. But rest of the working principle is the same as we have seen in the last section. As soon as we apply a zero logic to cd counter ic, it starts binary counting sequentially.

LEDs display the output. Counting stops when we apply logic high to clock disable pin. But counter starts counting from the same position when we again apply logic zero this E pin. Applications This IC has numerous applications in electronic circuits.

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