6N136 High Speed Optocoupler Pin Configuration, Features and Working principle
24 November 2023
Ⅰ. Overview of 6N136 optocoupler
Ⅱ. Symbol, footprint and pin configuration of 6N136 optocoupler
Ⅲ. Features of 6N136 optocoupler
Ⅳ. Technical parameters of 6N136 optocoupler
Ⅴ. Applications of 6N136 optocoupler
Ⅵ. Working principle of 6N136 optocoupler
Ⅶ. What is the difference between 6N135 and 6N136?
Optocoupler has good isolation effect on input and output electrical signals, so it is widely used in various circuits. In this article, you'll be acquainted with the 6N136 optocoupler chip, renowned for its broad applicability and distinctive features. Once we grasp these features and usage scenarios, we will enhance our comprehension of this chip, enabling us to more effectively implement it in actual projects.
6N136 high-speed optocoupler is an optocoupler device with excellent characteristics. A highly infrared luminescent tube and photosensitive transistor are packaged inside, making it smaller in size and longer in lifespan. In addition, it also has the characteristics of strong anti-interference, high isolation voltage, and is compatible with TTL logic levels. Therefore, high-speed optocoupler 6N136 is widely used in logic circuits, isolation circuits and switching circuits. These properties make it an indispensable part of many electronic devices, used to improve the performance and stability of the device.
Replacements and equivalents:
• PC900
• SFH620A
• TLP621
The figures below show the symbol, footprint and pin configuration of 6N136.
1. Low static power consumption
The 6N136 chip has the characteristics of low static power consumption and can maintain low power consumption in standby mode. It can effectively reduce system energy consumption and extend battery life.
2. Wide input voltage range
The 6N136 chip exhibits a broad input voltage range, allowing it to accommodate diverse input voltages. It automatically regulates the output current within this voltage range, ensuring a consistent output current and maintaining stable LED brightness despite fluctuations in voltage.
3. Efficient energy conversion
The 6N136 chip adopts a linear step-down and constant current method, which can convert the input voltage into a stable output current and has the characteristics of high efficiency. It can automatically adjust the output current to adapt to changes in input voltage, thereby keeping the output current stable and ensuring that the brightness of the LED light is not affected by voltage fluctuations.
4. Stable output current
The 6N136 chip uses a constant current source, which can maintain a constant current output within the output current range and has high precision. The chip can adjust the output current according to application requirements to meet the requirements of different application scenarios.
5. Multiple protection
The 6N136 chip incorporates several protective features to safeguard both the LED lamp and the chip from diverse abnormal conditions. These include overvoltage protection, overcurrent protection, and short circuit protection. Additionally, the chip can autonomously identify and shield the system against potential damage.
6. Fast response time
The 6N136 offers response times in the sub-microsecond range, making it ideal for applications requiring fast signal transmission.
• Industrial Automation: In industrial control systems, it is often used to isolate signals between sensors and controllers to prevent noise and electrical interference.
• Medical equipment: To guarantee safety in certain medical devices, it is necessary to achieve electrical isolation between patients and operators. The 6N136 optocoupler can serve as a crucial component in such systems.
• Power control: In some power supply and power control applications, 6N136 can be used to isolate control signals to prevent high-voltage parts from causing damage to low-voltage parts.
• Communications: Optocouplers are widely used in communications systems, especially in applications that require isolation of sensors, controllers, or other circuits. 6N136 can be used in serial communications, such as RS-232, RS-485, etc., to ensure the reliability and security of data transmission.
• Electrical isolation: 6N136 is mainly used to provide electrical isolation between high voltage and low voltage systems. The signal transfer between the high-voltage side and the low-voltage side is achieved optically, rather than directly through an electrical connection.
The structural schematic diagram of 6N136 is shown in the figure. The signal is input from pin 2 and pin 3, the light-emitting diode is lit, and the light is then transmitted to the photodiode on the output side. The reverse-biased photodiode is turned on, and after current-to-voltage conversion, it enters the base of the triode, and the triode turns on. After the triode is reversed, the photoelectric isolator outputs a low level, otherwise it outputs a high level. The transistor in the photoelectric isolator plays the role of amplification and output.
1. Uses
The 6N135 finds application in trigger circuits, logic circuits, solid-state switches, and pulse amplifier circuits, while the 6N136 is utilized in switching circuits, digital-to-analog conversion, isolated lines, long-line transmission, high-voltage control, logic circuits, linear amplification, over-current protection, level matching, and more.
2. Features
The 6N135 features temperature, current, and voltage compensation functionalities, coupled with excellent input and output isolation. This device is compatible with LSTTL/TTL, boasts a typical speed of 10MBd, and exhibits remarkably low input current (a mere 5mA). In contrast, the 6N136 offers a more compact size, extended lifespan, and enhanced resistance to interference. It achieves high isolation voltage and maintains compatibility with TTL logic levels.
3. Output type
The 6N135 coupler features an open collector output, necessitating the addition of an external pull-up resistor for proper operation. In contrast, the 6N136 boasts a totem-pole output, offering both current sinking (pull-down) and current sourcing (pull-up) outputs without the need for external pull-up resistors.
4. Structure
The 6N135 includes an AlGaAs LED with a wavelength of 850nm and an integrated detector, comprising a high-gain linear operational amplifier, a photodiode, and a Schottky clamped triode. As for the 6N136, it packages a phototransistor and a highly infrared luminescent tube.
Frequently Asked Questions
1. What is the use of 6N136?
The 6N136 diode-transistor optocoupler uses an insulating layer between a LED and an integrated photodetector to provide electrical insulation between input and output.
2. What are some common applications of the 6N136?
The 6N136 is often used in applications where electrical isolation is crucial, such as in industrial control systems, power supply feedback loops, and communication interfaces between systems with different ground potentials.
3. What is optocoupler in electronics?
An optocoupler (also called optoisolator) is a semiconductor device that allows an electrical signal to be transmitted between two isolated circuits. Two parts are used in an optocoupler: an LED that emits infrared light and a photosensitive device that detects light from the LED.
4. How does the 6N136 ensure electrical isolation?
The key to electrical isolation in the 6N136 is the absence of any direct electrical connection between the input and output sides. The input signal is converted into an optical signal, transmitted across the gap, and then converted back into an electrical signal on the output side.
