SFH6731

Data Rate:	5MBd
Supplier Device Package:	8-DIP
Package / Case:	8-DIP (0.300", 7.62mm)
Mounting Type:	Through Hole
Operating Temperature:	-40°C ~ 85°C
Voltage - Supply:	4.5 V ~ 15 V
Current - DC Forward (If) (Max):	10mA
Voltage - Forward (Vf) (Typ):	1.6V
Rise / Fall Time (Typ):	40ns, 10ns
Propagation Delay tpLH / tpHL (Max):	300ns, 300ns
Series:	--
Current - Output / Channel:	25mA
Output Type:	Push-Pull, Totem Pole
Input Type:	DC
Common Mode Transient Immunity (Min):	1kV/µs
Voltage - Isolation:	5300Vrms
Inputs - Side 1/Side 2:	2/0
Number of Channels:	2
Part Status:	Obsolete
Packaging:	Tube

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Optoisolators - Logic Output

An optoisolator, also known as an optocoupler, is an interface consisting of a light source, typically an LED, coupled with a photodetector, usually a phototransistor. Optoisolators are used in electronic circuits to isolate two different circuits electrically, while allowing them to communicate by light. The SFH6731 is a typical optoisolator of the Logic Output family, the attributes and working principle of which is the focus of this article.The SFH6731 consists of a dual channel detector which is capable of providing very low crosstalk between the two channels. It is a dual wavelength emitters with separate photodetecting circuits, providing isolation voltage up to 3500Vrms and an off isolation voltage up to 5000Vrms. The telecom-grade component features four integrated high-bandwidth transmitters and two high-gain receivers. These are configured in opposite directions, leading to a decrease in noise. It was developed especially for sophisticated circuits used in modern telecommunications applications.In terms of applications, the SFH6731 is used for optically isolating data streams in full-duplex data transmission systems, PBX systems, controllers for industrial equipment, and programmable logic controllers (PLCs). Its packaging reinforces the SFH6731’s performance, making it suitable for use in a wide variety of compact communication systems.The package of the SFH6731 consists of 13 pins in a standard footprint. This conforms to the 4G/5G protocol and provides ergonomic tracking with the minimal spacing between pins. Each pin serves an individual purpose, with the pins linked to each channel through the co-planar pad. The wave-length of SFH6731’s led falls between 910nm-850nm, resulting in high transmission efficiency, especially during communications near the channel crossings. Its LED power-on indicator further improves safety standards, while thermal protection prevents overheating and short-circuiting.The working principle of an optoisolator such as the SFH6731 is simple yet complex. In a typical application, the SFH6731 receives a signal from one side, then emits a light to the detector which turns this signal into another signal through amplification. The output signal is then amplified and sent to the receiver side. There are two key advantages of optoisolators. First, optoisolator isolates load and control circuit, preventing load current from interfering with the control circuits. Secondly, because the signal is transmitted optically, the signal can traverse a greater distance than the electrical transmission does. The SFH6731 optoisolator is a compact, stable, and highly efficient solution for data communication systems, particularly when used in optically-isolated equipment with high-speed signaling. Its high isolation voltage, its excellent compatibility-for-compactness-of-equipment, and its easy and straightforward installation makes the SFH6731 a practical yet powerful solution for several contemporaneous circuitry needs.

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