Introduction to 6n137
Hello Friends! I hope you are enjoying your life and having fun. Today, I am going to give you brief details on the
Introduction to 6n137. It is a photocoupler that is used to transfer electrical signal with the help of light between two separated circuits. It consists of one chip photo IC and high emitting diode. It is a 8 pin device which comes in DIP package. I'll try to cover as many aspects as possible related to this photocoupler. Let's get started.
Introduction to 6n137
- 6n137 is a photocoupler also known as optocoupler that is used to connects the two electrically isolated circuits with the help of light.
- It consists of 8 pins where inputs and outputs terminals are electrically isolated which help in controlling the large power, current and AC voltages with small digital signal.
- It is great electronic device with is used for both AC and DC signals and allows low voltage signals, digital switch or PC's output port to control the devices like triacs and power transistors.
- 6n137 is widely used in energy generation and energy distribution.
- It is a main source of producing uninterruptible power supply and is incorporated with LED and photo-detector logic gate that features strobable output.
- Main purpose of this output is to exhibit an open collector which allows wired OR-outputs.
- The incorporated parameters operate with the temp range from -40 to 85 ºC.
- The 6n137 is best choice for input-output buffering and high speed logic interfacing.
6n137 Pin Configuration
6n137 consists of 8 pins where input and output terminals are electrically isolated.
Function of each pin is described as follows
1: N.C 5: GND
2: Anode 6: Output
3: Cathode 7: Enable
4: N.C 8: Vcc
- A capacitor of 0.1uF should be connected between the pins 5 and 8.
- 6n137 is desgined in a perfect way to achieve TTL compatibility and exhibits maximum dc and ac circuit isolation.
Working of 6n137
- 6n137 consists of LED that converts electrical signal into light.
- It features closed optical channel which is also referred as dielectric channel and photosensor which helps in detecting the light and produces electric energy.
- The sensor can be triac, silicon controlled rectifier (SCR), phototransistor, photodiode, or photoresistor.
- Because, LED not only helps in sensing light but also emits it.
- A sudden increase in voltage can be applied to power transmission lines and other electronic equipment. The main function of optocoupler is to block the sudden in voltage, so that latest surge in the voltage can not effect the other part of the circuit.
- This process was mainly used in the early isolation transformers, where inductive coupling was used between input and output that are electrically isolated.
- Both, optocouplers and transformers encompass reinforce protection i.e. they protect, both, the equipment and the user who is operating the equipment.
- Both come with a physical isolation barrier, but feature protection that is equivalent to double isolation.
Truth Table
Truth table of 6n137 is shown in the figure below
- It is clear from picture when input and enable is high then output will be low.
- When input is low and enable is high then output will be high.
- Similarly when input is high and enable is low then output is high.
- When both, input and enable are low then output will be high.
- Basically 6n137 interconnects the input and output sides with the help of light.
Features
6n137 encompasses following features.
- Strobable output
- Logic gate output
- Wired OR-open collector
- U.L recongnized
- Fan-out of 8 over -40 to 85 ºC
- Double working voltage -480 V
- Superior CMR – 10 kV/µs
- Very high speed – 10 MBit/s
Absolute Maximum Ratings
Following figure shows the absolute maximum rating of 6n137.
- It is important to note that if stresses are exceeded from absolute maximum rating, they can damage the device at large.
- Also, if stresses are applied for extended period of time above the recommended operating conditions, they can effect the device reliability.
Applications
- Ground loop elimination
- Data multiplexing
- LSTTL to TTL, LSTTL or 5-volt CMOS
- Computer-peripheral interface
- Switching power supplies
- Pulse transformer replacement
- Line receiver and data transmission
This is all about the optocoupler 6n137. I hope you have got the clear idea about this optocoupler i.e. what it does and what are its main application? However, if still you feel and doubt or question you can ask me in the comment section below. I'll try my best to resolve your query according to best of my expertise. Stay tuned!
Introduction to 2n6027
Hey Fellas! Hope you are doing great! I try my best to give you information that can help you excel in your field and put you ahead from others. Today, I am going to unlock the details on the
Introduction to 2n6027. It is a uni-junction transistor that comes with UTC's advanced technology and provides high peak output voltage, low offset voltage, low gate to anode leakage current and forward voltage. I'll give a brief introduction about this transistor so you don't need to go anywhere for searching information regarding this transistor.
Introduction to 2n6027
- 2n6027 is a programmable uni-junction transistor (PUT) that is widely used in pulse and timing circuits, oscillator, and thyristor-trigger.
- Anode gate availability with this transistor makes it useful for special thyristor applications.
- It is referred as programmable because values like peak voltage Vp and intrinsic standoff ration ? can be programmed using two external transistor.
- 2n6027 comes in four layer construction and contains three junction and three terminals called anode, gate, cathode.
- Current won't be flowing as we bias the PUT properly because gate is positive with respect to cathode. However, PUT will turn ON when we increase the anode voltage and it will allow the PN junction to get forward biased.
- PUT will turn OFF as we decrease the value of anode voltage below cut off.
2n6027 Pinout
2n6027 is a unijunction programmable transistor that consists of three terminals
1: Anode
2: Gate
3: Cathode
- It is valuable for high volume requirements and comes in sophisticated inexpensive T-92 plastic package.
- It belongs to thyristor family and comes in four layer construction.
2n6027 Internal Block Diagram
Following figure shows the internal block diagram of 2n6027.
- It is clear from the figure that 2n6027 comes in four layered construction where first layer is P-layer that represents anode.
- The next layer is N-layer which is a gate.
- Third layer is left alone while fourth layer is again P-layer that represents the cathode.
- For external connection, ohmic connections are made on the cathode, gate and anode.
Features
- It encompasses following features
- Low Forward Voltage
- Low Offset Voltage
- Low Gate to Anode Leakage Current
- High Peak Output voltage
PUT Characteristics
Programmable uni-junction transistor characteristics represents the graph between anode current Ia and anode voltage Va.
- It is clear from the figure that positive voltage is applied to the anode and cathode is set to ground.
- The junction of two external resistor is connected to gate which constructs a voltage divider circuit.
- Values of two resisters help in determining the peak voltage and intrinsic standoff voltage.
- Anode to cathode voltage is directly proportional to the anode current i.e. when we increase voltage, current will increase and junction acts like a PN junction.
- The point at which anode to cathode Va voltage cannot be increased in called the saturation region. In this region maximum number of charges will be injected in the junction.
- Beyond this point anode voltage decreases and anode current increases. This also represents the negative resistance region and this characteristic can be used in the Oscillators.
- The point at which anode voltage cannot be reduced below minimum value, is called valley point.
- At this point, device will be fully saturated and junction will act like a saturated P-N junction.
- The point at which anode to cathode voltage enters the negative resistance region is called peak voltage. Peak voltage can be represented in the following equation.
Vp = 0.7V + Vg = 0.7V + VR1 = 0.7V + ?Vbb
- Here ? represents the intrinsic standoff ratio. and Vbb represents the total voltage houses in external resistor network.
- Intrinsic standoff ration is the ration between R1 and the sum of R1 and R2. It will determine how much voltage will drop across cathode and gate terminal of PUT.
- ? = R1/R1+R2
Absolute Maximum Ratings
Following figure shows the absolute maximum rating of uni-junction programmable transistor
- Absolute maximum rating are also known as stress ratings.
- It is important to note that values given above are standard values.
- If values are exceeded from given value it can damage the device at large.
- If stresses are extended from the given operations conditions, they can harm the device reliability.
- Duty Cycle = 1%
- Anode positive, RGA=1000 ohms
- Anode negative, RGA=Open
Applications
- 2n6027 is widely used in oscillator circuits.
- It is used in pulse and timing circuit.
- It can be used as a thyristor-trigger.
That's all for today. I try my best to give you information in the slotted form so you can digest the information easily. I can understand when people feel overwhelmed and exhaused when they are bombarded with lots of ramdon information that is not fully organised. However, if still you feel any doubt or query in understanding the concept of PUT, I am there for you. Just ask me any question in the comment section below. I'll try my best to solve your query according to best of my expertise. Stay Tuned!