CD74HC4017M

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CD74HC4017M belongs to the category of Logic - Counters, Dividers. It is a 4-stage Divide-by-10 Johnson Counter. This device is shown in Figure 1. It can count the number of clock pulses applied to its input, up to 10 and then reset to start the next cycle. It is capable of operating from 2V to 6V and its outputs are open-drain type.

CD74HC4017M Application fields:

In applications such as automotive, industrial control, Avionics, medical, communications, and consumer applications. The CD74HC4017M can be used for :

• Industrial Automation applications such as robotics, food processing and packaging.
• Automotive applications such as instrument panel gauges, airbag controls and engine ignition.
• Medical applications such as tests, clinical trials and medical instrumentation.
• Consumer applications such as gaming, cell phones and computers.
• Lighting applications such as stage lighting, spot lights and decorative lighting.
• Avionics applications such as navigation systems, aircraft instruments and avionics.
• Communications applications such as networking, Wi-Fi and cellular.

CD74HC4017M Working Principle:

The working principle of the CD74HC4017M is based on the Johnson counter topology. It is a four-stage divide-by-10 Johnson counter. It consists of four D-type flip-flops (Figure 2). Each flip-flop has two outputs – Q and Q-bar. When the input clock signal is applied, the flip-flops sequentially toggle their outputs.

When the clock signal is applied to the clock input, the outputs of the flip-flops will sequentially toggle from low to high and then cycle back to low again. The output of the last flip-flop is connected to the reset input of the first flip-flop, thus completing one cycle of the count. This process will be repeated as long as there is a clock signal applied to the clock input.

The outputs of the CD74HC4017M can be used to drive external devices such as LEDs or other logic circuits or to generate signals to be used in applications such as frequency division, timing and pulse generation.

Conclusion:

The CD74HC4017M 4-stage Divide-by-10 Johnson Counter is an ideal device for applications such as industrial automation, automotive, medical, consumer, light, communications and avionics. It can be used both to drive external devices and to generate signals for applications such as frequency division and timing.

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