4047 IC is one of the inverters that are widely used in various electrical and engineering applications.
4047 IC is a CMOS IC that is designed to provide the inverting function.
This IC can be used in applications like frequency dividers, pulse generators, and so on.
One of the reasons behind its massive popularity is its ability and efficiency to store and discharge electrical energy.
In this article, we are going to dig deep into everything you should know about 4047 IC.
4047 IC Basics
Also known as CD 4047, we can simply define 4047 as a CMOS multivibrator. It can either be a monostable or a stable Cmos multivibrator.
It is also vital to note that 4047 IC is designed to convert DC to AC currents while at the same time generate sine and pulse waves.
It is also worth noting that 4047 IC is one of the very few multivibrator available in the market.
For instance, 4047 IC has two independent monostable multivibrators that can be used as a bistable multivibrator.
The reason behind the use of two different monostable multivibrators is to enhance the efficiency and quality of the device.
It is also vital to note that 4047 can generate sine waves between zero and 50Hz.
There are also several other reasons why 4047 IC has gained massive popularity in recent years. We will look into them in this article.
To learn more about this popular integrated circuit, you need to read this article till the end.
4047 IC pin configuration
An IC 4047 IC encompasses 14-pins, which are as follows:
From the above pin configuration, we can see that it has 14 pins. It is also vital to note that each of the pins has its own role in governing the working of this multivibrator.
The following is a detailed explanation of each pin and its role:
-Pin 1: (C): This is also known as Cap timing and it is used for connecting to the external capacitors positioned between Rcc and Res.
-Pin 2 (Res timing): This is also used for connecting to the external resistors positioned between Rcc and Res.
-Pin 3 (Rcc timing): It is used for connecting to the external resistors positioned between the Rcc and Cc pins.
-Pin 4 (Cc timing): It is used for connecting to the external capacitors positioned between the Rcc and Cc pins.
-Pin 5: This pin controls the state of Q0 when it is high (Astable). When this pin is high, Q0 will be in its active state, i.e., it will be in its low impedance state. On the other hand, when this pin is low, Q0 will be inactive or in a high impedance state. In other words, this pin determines whether Q0 is active or inactive. It also controls whether a pulse generated at Tn input goes to Q1 or not on every alternate cycle of operation of multivibrators.
-Pin 6: This pin controls the state of Q1 when it is high (Trigger). When this pin is high, Q1 will be in its active state, i.e., it will be in its low impedance state. On the other hand, when this pin is low, Q1 will be inactive or in a high impedance state. In other words, it determines whether Q1 is active or inactive too just like Pin 5 does with respect to Q0. It also controls whether a pulse generated at Tn input goes to QB or not.
-Pin7 (Vss): This is the main GND pin of the IC. It is connected to the negative terminal of the battery through a 0.1µF decoupling capacitor.
-Pin 8 (Vs): This is the positive supply pin for IC. It is one end of a voltage divider network made up of R1 and R2 connected together between Vs and GND respectively.
-Pin 9(External reset): This is an external reset pin for the IC. Once you deliver a high pulse to this pin, it will reset the output Q to low Q’ to high.
-Pin 10 (Q) This is a non-inverting output pin.
-Pin 11(-Q): This is the inverting output pin
-Pin12(Retrigger Pin): The 12th pin of the 4047 IC is mainly used for activation purpose. It activates the Pin 7 and Pin8 simultaneously when they are in the monostable mode.
-Pin13 (OSC Output): The main function of this pin is to provide oscillated o/p when in stable mode.
-Pin 14 (Vdd): This is the positive power supply pin
4047 IC/CD4047 Specifications
Whenever you plan to buy a 4047 IC, you should take time to check out its specifications which include;
-Input supply voltage: This is the voltage that must be provided to the IC in order to operate. In most cases, this is 12V or 24V.
-Output current: This is the maximum current that can be delivered to the output pin.
-Maximum frequency: The maximum frequency at which the IC can operate is 1MHz.
-Maximum frequency variation: The maximum frequency variation at which the IC can operate is greater than 25%.
-Operating range of temperature: The operating range of temperature is -40°C to +85°C
-Maximum operating temperature: The maximum operating temperature at which the IC can operate is +100°C
-Minimum junction temperature: The minimum junction temperature at which the 4047 IC can operate is -40°C.
-Leakage current: This is the maximum value of current that flows through the circuit when there is no input signal.
-DC input current: The DC input current is the maximum value of current that can be applied to the circuit. In most of the cases, this is 50mA and 100mA.
General features of 4047 IC
Let’s look at the key attributes and characteristics of 4047 IC:
-Operate in stable and monostable modes: The IC has the capability to switch in both modes. Astable mode is when the IC is triggered by a high input signal and the output is maintained at its logic level while monostable mode is when the IC is triggered by a low input signal and the output remains low.
-Low current leakage: The 4047 IC uses low leakage diodes which ensure that no current flows through the circuit when there is no input signal.
-Reliable operation: The IC has the capability to operate in its stable and monostable modes with reliability. It is also possible to switch between these modes.
-High speed operation: The 4047 IC can be used for many applications such as oscillators, time delay circuits, frequency dividers etc.
required for its production, thereby reducing its cost.
-Immune to noise: The 4047 IC has a very low noise level which is much lower than other types of ICs.
-Small size and weight: The small size and the light weight of this IC make it ideal for portable applications.
-Wide supply voltage range: The wide supply voltage range of this IC makes it ideal for use in many different applications.
-Requires single capacitor and resistor externally: These two electronic components must be connected outside the IC for them to store charges and at the same time control the flow of current respectively.
– Buffered inputs and outputs: The buffering of the inputs and outputs of the IC makes it ideal for applications such as frequency dividers and oscillators.
-Low power consumption: The low power consumption of this IC makes it ideal for portable applications.
-Wide operating temperature range: The wide operating temperature range of this IC makes it ideal for use in many different applications.
What is the difference between Astable mode and Stable mode in 4047 IC?
The 4047 IC can be operated in either a stable or astable mode. In the stable mode, the outputs of the flip-flops are connected to the inputs of the next flip-flop, thus completing a full cycle.
In contrast, in the astable mode, only one output is connected to an input and this output is connected to its own reset input. The remaining outputs are held at logic 0.
The 4047 IC has a built-in bias circuit that ensures that this logic state remains for an extended period of time and does not change after each clock pulse.
Applications of 4047 IC
Here are some of the uses of 4047 IC:
-Convert DC to AC: This is the most common use of the 4047 IC. After all, most electronic devices and appliance use AC signals, making the conversion crucial.
-Convert AC to DC: This is another application of the 4047 IC. The IC can be used to convert AC to DC and vice versa.
-Convert audio signals: The 4047 IC is also commonly used as an audio signal converter. It can convert various audio signals into a form that is easily processed by other components such as transformers, amplifiers, etc.
-Multiplication of the frequency: This process entails taking the output of the 4047 IC and feeding it to another IC that is used to multiply the frequency.
-Generation of sine signals: This process entails taking the output of the 4047 IC, feeding it to another IC, and then feeding this output back to the first IC.
-Time delay applications: Time delay process entails taking the output of the 4047 IC and feeding it to another IC that is used to delay the signal.
-Frequency discriminators: Discrimination is a process whereby different frequencies and their amplitudes are selected. 4047 ICs are used in applications that require accurate frequency discrimination.
I hope that now you know all the basics of the 4047 IC, how it works and how to choose one. In case you want to buy one, ensure that it is from reliable sources. You can even use a sourcing agent in China to help you with the purchasing process.
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