What Is CD4017BE CMOS Counter And How It Works?
18 October 2023
Ⅰ. Overview of CD4017BE counter
Ⅱ. Symbol, footprint and pin configuration of CD4017BE
Ⅲ. Technical parameters of CD4017BE
Ⅳ. What are the features of CD4017BE?
Ⅵ. What are the applications of CD4017BE?
Ⅶ. Advantages and disadvantages of CD4017BE counter
The CD4017BE is a complementary metal oxide semiconductor (CMOS) integrated circuit commonly used as a counter, divider or sequencer. It has 10 decoding output terminals and CP, CR, INH input terminals. Its Schmitt trigger on the clock input has pulse-shaping capabilities, capable of handling the rise and fall times of the input clock pulses without limit. When the clock disable signal is low, this counter will have the advanced feature of one count increment and output it through its decoding output if the clock signal transitions forward.
Replacement and equivalent:
• CD4017BE
CD4017BE has a total of 16 pins, and their names are as follows:
Pin 1-7, 9-11 (Output pins Q0 to Q9): These are the 10 output pins on which the counting occurs, they are not in order hence verify pin diagram above
Pin 8 (Vss or Ground): Connected to the ground of the circuit
Pin 12 (Carry Out (CO)): This pin goes high after the IC counts from 1 to 10. This is used as carry while counting.
Pin 13 (Clock Enable (EN)): This is an input which when made high will hold the count at the current state.
Pin 14 (Clock): The counting happens when this clock pulse goes high, this pin is normally connected to 555 timer or other uC to produce a pulse.
Pin 15 (Resets): As the name suggests this pin resets the count back to 1.
Pin 16 (Vdd/Vcc): Connects to the supply voltage typically +5V
• Has standard symmetrical output characteristics
• Inputs and outputs are protected against static electricity.
• It can operate under fully static conditions. The circuit maintains its logic state even without any clock signal or power supply.
• The CD4017BE integrated circuit has low power consumption, allowing battery-operated devices to achieve longer run times.
• Provides a wide voltage range: It can work normally within the operating voltage range of 3V to 15V, which gives it certain flexibility in different power supply situations.
• Reset function: It has a reset pin (RESET), which is usually connected to the ground of the circuit board. By connecting the RESET pin to ground level, the counter can be reset to its initial state, which is the Q0 output.
• Frequency division function: CD4017BE is mainly used for frequency division and counting applications. It can divide the input clock pulse signal into 10 different frequency levels, which makes it very suitable for digital counter applications.
• Single pulse timing: The way CD4017BE works is that when a single pulse is input on the clock input pin (CLK), the output pins switch one by one and follow 1-2-4-8-5-10-9-7 output in the order of 3-6.
The CD4017BE chip uses a clock pulse signal as input, which is passed through the CLK pin of the chip. When each clock pulse arrives, the output pin of CD4017BE will be set cyclically in a preset sequence to realize cycle counting. This feature makes it ideal for frequency division and counting tasks.
The CD4017BE counter is an important part of the computer terminal. It can count pulse signals in the computer terminal, such as pulse signals input through the keyboard or pulse signals generated by mouse clicks.
In the field of instrumentation, the CD4017BE counter can be used to measure the quantity of physical or chemical quantities, such as weight counting of weighing instruments or titration counting of chemical analysis instruments.
In the field of electronic equipment, it can be used to control the workflow of the device, or to control the timing of opening and closing such as the playback time of a DVD player, the scheduled on and off of air conditioners, etc.
In the field of data processing, it can be used to accurately count the transmission rate or processing rate of data, such as network transmission rate or hard disk read and write rate. By using the CD4017BE counter, we can better understand and manage the speed of data transmission and processing, further improving work efficiency and system stability.
In the field of industrial automation, the CD4017BE counter can be used to count the number of displacement pulse signals of the moving parts of the machine, such as the moving distance of the robot and the rotation angle of the servo motor. By inputting the pulse signal to the input terminal of the CD4017BE counter, the counter can record and display the displacement status of the machine's moving parts in real time.
1. Advantages
(1) Wide temperature range: The counter adopts a wide temperature range package and can work normally in the range of -40℃ to 125℃.
(2) Anti-static protection: Both the input and output ports adopt anti-static protection design, which can protect the circuit under harsh environmental conditions and avoid interference from electrostatic discharge.
(3) Multiple packaging forms: The counter provides a variety of packaging forms to choose from, including SOP14, TSSOP14 and DIP14, etc. to meet various needs.
(4) High counting speed: CD4017BE counter adopts Johnson counter architecture, which can provide high counting speed up to 5 levels.
(5) CD4017BE is an independent 4-bit counter using Johnson counter architecture. It has high-performance counting speed and can reach the highest 5-level counting rate. It can be used in various digital systems such as pulse generators, timers, sequencers, etc.
2. Disadvantages
(1) Does not support dynamic refresh: This counter does not support dynamic refresh, but needs to be refreshed bit by bit under the control of a clock signal, which means that the response speed of the counter may be affected in some cases.
(2) Cannot self-reset: The CD4017BE counter is a common binary counter chip. It has independent enable pins and preset pins, and can realize forward or reverse counting, but it does not have a self-reset function. If the counter needs to be reset, it can be done manually or through an external circuit. During manual operation, the CLR pin of the counter can be pulled low for a duration greater than the pulse width of the CLR pin, and then the CLR pin is released to complete the reset operation. Implementing reset through an external circuit requires designing corresponding circuit connections.
(3) Limited counting range: Its counting range is relatively limited and cannot handle values exceeding 5 digits. When the number of digits that need to be counted exceeds 5, we need to use other higher-precision counters to complete.
Frequently Asked Questions
1. What is CD4017BE used for?
CD4017BE is used for low range counting applications. It can count from 0 to 10 (the decade count). The circuit designed by using this ic will save board space and also time required to design the circuit. CD4017BE is as 'Johnson 10 stage decade counter'.
2. What is the input signal type of CD4017BE counter?
The input signal type of the CD4017BE counter is a decimal digital signal, including a clock signal, a reset signal and a clock disable signal.
3. What is a Johnson Decade counter?
Johnson Counter. This circuit is a 5-bit Johnson counter used to implement a decade counter. The ring of 5 D flip-flops is the Johnson counter; their output is shown on the bottom. The Johnson counter output is used to generate 10 outputs; each output goes high in turn.
4. What is the operating temperature range of CD4017BE?
The operating temperature of CD4017BE ranges from -55°C to 125 °C.
5. What is the reset method of CD4017BE counter?
The reset method of the CD4017BE counter is asynchronous reset, that is, when the reset signal is low level, the output of the counter will be cleared.
