Package / Case:	8-SMD, Gull Wing
Supplier Device Package:	8-SMD
Series:	--
Packaging:	Tape & Reel (TR)
Part Status:	Active
Number of Channels:	1
Voltage - Isolation:	5000Vrms
Current Transfer Ratio (Min):	300% @ 1.6mA
Current Transfer Ratio (Max):	--
Turn On / Turn Off Time (Typ):	1.4µs, 8µs
Rise / Fall Time (Typ):	--
Input Type:	DC
Output Type:	Darlington with Base
Voltage - Output (Max):	7V
Current - Output / Channel:	60mA
Voltage - Forward (Vf) (Typ):	1.3V
Current - DC Forward (If) (Max):	20mA
Vce Saturation (Max):	--
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount

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Optoisolators - Transistor, Photovoltaic Output - 6N138S1

Introduction

Optoisolators are a type of electronic semiconductor component that contains both an optical and electrical input. They provide a reliable form of electrical isolation between two circuits and can also be used as an interface between two circuits that have different voltage levels. An optoisolator typically consists of an optically sensitive device, an optical coupler, and a light source. In this article, we will discuss the application fields and working principle of the 6N138S1 optoisolator.

6N138S1 Application Fields

The 6N138S1 optoisolator is a classic bipot LED diode optoisolator. It is suitable for use in a wide range of applications, such as in machine tool and industrial automation controllers, communications systems, medical electronic systems, automotive electronics, and industrial electronics. These optoisolators are designed to provide isolation between two different circuits, such as between a digital logic interface and an analog interface, and can also be used to maintain a high level of signal integrity. The device offers high current transfer ratio, and is available in a variety of package sizes, which makes it suitable for a wide range of applications.

6N138S1 Working Principle

The 6N138S1 optoisolator consists of three major components: a low voltage circuit, a light emitting diode (LED), and a photoreceptor. The photoreceptor is typically a Si photodarlington and consists of two diodes placed in opposite directions and connected in a back-to-back configuration. This design helps to protect the sensitive electronics from electrical noise and transient signals.The LED is connected to the low voltage circuit, and the photoreceptor is connected to the high voltage circuit. When a voltage is applied to the LED, it emits light which is detected by the photoreceptor. This triggers a voltage across the photoreceptor, which then activates the desired output on the high voltage side. The light emitted by the LED is completely isolated from the high voltage side, which helps protect sensitive components from electrical shocks.

Conclusion

The 6N138S1 optoisolator is a versatile device that can be used in a variety of applications. It offers an effective means of electrical isolation, and is available in various package sizes. The working principle of the optoisolator involves the use of an LED and a photoreceptor, which work together to provide an isolated output and to protect sensitive components from electrical shocks.

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