6N139S(TA)

Output Type:	Darlington with Base
Supplier Device Package:	8-SMD
Package / Case:	8-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-40°C ~ 85°C
Vce Saturation (Max):	--
Current - DC Forward (If) (Max):	20mA
Voltage - Forward (Vf) (Typ):	1.3V
Current - Output / Channel:	60mA
Voltage - Output (Max):	18V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	--
Turn On / Turn Off Time (Typ):	200ns, 1.7µs
Current Transfer Ratio (Max):	--
Current Transfer Ratio (Min):	500% @ 1.6mA
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Optoisolators are electronic devices that are used to electrically isolate two devices from each other while transmitting digital or analog signals between them. The TA (6N139S) type of optoisolator is one of the most commonly used optoisolator types and is designed with a transistor output. It is designed to separate two circuits using a photovoltaic (PV) output and optical coupling.The 6N139S optoisolator has a variety of applications, which range from digital and analog signal transmission to medical and military systems. It can be used for level conversion, controlling high voltage or current devices, switching logic circuit levels, and other applications. Its primary function is to provide electrical isolation and to keep the high-voltage and low-voltage signal paths electrically separated.A 6N139S optoisolator is composed of a gallium arsenide LED encased in a sealed package. The LED is wired to create an electrical current when a voltage is applied to it. The LED is triggered and emits a photon of light which is absorbed by a photodiode. As the photodiode absorbs the light, an electrical current is generated which is proportional to the intensity of the light. The current signal is then converted to a voltage and is transformed to the output transistor signal.The output from the optoisolator is connected to the controlling and controlled circuits and is capable of transmitting digital or analog signals. This type of optoisolator operates in a switching mode; the output of the optoisolator is either high or low depending on the input signal. When the output is low, the device is in off-state, and when the output is high, the device is in on-state. The 6N139S optoisolator output is very reliable and fast since the device is operated with a solid state AC input, and no mechanical contact is made. The speed and accuracy are increased by the incorporation of a built-in diode which helps improve the signal frequency. The output from the optoisolator is voltage and current regulated which provides very stable output. The output from the optoisolator also has low EMI, making it suitable for a variety of applications. The advantages of using a 6N139S optoisolator are numerous. To begin with, it provides electrical isolation and a high degree of reliability by separating two circuits. This ensures a clean and safe signal transmission and eliminates the need for expensive grounding and shielding of electrical circuits. It is also a very cost effective solution since its output is modulated thereby eliminating the need for costly amplification stages. The 6N139S optoisolator is a very versatile and useful device, as it is suitable for a variety of applications such as level conversion, switching logic circuit levels, controlling high voltage or current devices, and digital and analog signal transmission. It is easy to use, operates at a very reliable speed, and provides electrical isolation to keep two circuits electrically separated while transmitting digital or analog signals between them.

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