6N138-020E

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Optoisolators–Transistor, Photovoltaic Output are components that are designed to help manage risk and protect critical systems. The 6N138-020E is a popular example of this type of device, designed to provide reliable isolation between input and output in a wide variety of applications. In this article, we’ll explore 6N138-020E application field and working principle to better understand its efficacy.

Application Field of 6N138-020E

The 6N138–020E optoisolator is designed to isolate digital circuits that need to be protected from signal noise and interference. It’s most commonly used in industrial automation, instrumentation, and telecommunications. Some other applications include remote sensing, data transmission, control systems, and printed circuit boards.

The 6N138–020E is an IC 4-channel photovoltaic optocoupler with an output voltage 1.9V and an output current of 2mA. It is suitable for applications that require low power dissipation and reliable isolation in digital logic circuits. The 6N138–020E optoisolator is compliant with UL1577, CSA class, EN60601-1, IEC60950-1, and IEC61730-2.

Features of 6N138-020E

The 6N138-020E optoisolator features a number of useful characteristics for digital logic applications, including:

• High speed digital logic isolation up to 175MHz.
• Low power consumption.
• Wraparound insulation & power-on reset circuit.
• High common mode rejection (CMR).
• Low propagation delay time.
• Low drive power requirement.
• EMI immunity.
• Operating temperature range of -40°C to +85°C.

Working Principle of 6N138-020E

The 6N138-020E optoisolator isolates the input signal from its output using a process known as photocoupling. This involves a light-emitting diode (LED) and a photodetector circuit, which are separated by a gap. When an input voltage is applied to the LED, photons are generated and transmitted across the gap. These photons are then detected by the photodetector circuit, which generates an output voltage.

This provides an isolated electrical current, meaning that any noise or interference occurring on one side of the optoisolator should not influence the other side. This provides better signal quality. The LED and photodetector circuit must be optically and electrically isolated to ensure a reliable optoisolation.

Conclusion

The 6N138–020E optoisolator is an invaluable tool for digital logic applications, providing reliable isolation that is essential for system efficiency and safety. Its low power dissipation, wide operating temperature range and high speed digital logic isolation make it a popular choice for many industrial automation, printed circuit board, instrumentation, telecommunication, control system and remote applications.

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