EL814S(TA)

Output Type:	Transistor
Supplier Device Package:	4-SMD
Package / Case:	4-SMD, Gull Wing
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 110°C
Vce Saturation (Max):	200mV
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.2V
Current - Output / Channel:	--
Voltage - Output (Max):	80V
Series:	--
Input Type:	AC, DC
Rise / Fall Time (Typ):	7µs, 11µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	300% @ 1mA
Current Transfer Ratio (Min):	20% @ 1mA
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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EL814S(TA) Application Field and Working Principle

The EL814S(TA) is an optoisolator belonging to the optoisolator -transistor, photovoltaic output family. It functions as a voltage/photovoltaic- isolation element in various applications requiring noise and transient protection. Isolation between input and output ensures that the output will not be affected by the parameters of the source and load circuits. This optoisolator also offers superior electrical insulation performance.Application Field

The EL814S(TA) is commonly used for applications such as fiber optic converters, electronic load switches, communications, motor speed switches, over-voltage protection, high-voltage breakers and printed-circuit boards. Furthermore, as a voltage/photovoltaic-isolated device, it has an excellent input dynamic range, allowing it to be used in a wide variety of systems.Working Principle

The working principle of EL814S(TA) is based on the use of a light-sensitive electrical element, within a reverse-biased semiconductor element. This light-sensitive assembly is the basis of the device, working as a signal-isolation element. When an input signal is applied to the optoisolator, the light-sensitive element (LSE) emits a corresponding electrical signal into the output termination, based on the applied input signal. This flow of current through the LSE generates a corresponding voltage across the reverse- biased semiconductor element, resulting in the desired Isolation voltage.The primary components used in the EL814S(TA) are the light-sensitive element, the semiconductor element, the common-terminal, the output-terminal, and an auxiliary-terminal. The light-sensitive element consists of a photo- detector, an LED, and a series of light-blocking layers and reflectors. When an input signal is applied to the primary light-sensitive element, the LED emits a corresponding light signal towards the photo- detector. The light signal is absorbed into the LED, and the generated current is then transferred to the output terminal, which is connected to the output voltage.The reverse-biased semiconductor element is also used to provide isolation between the input and output of the EL814S(TA). This element isolates the input and output from each other, allowing the device to function properly despite any changes in the parameters of the source or load circuits. A common-terminal is also used in the device, which allows for the common-ground between the output and input, to ensure that the output voltage does not exceed a certain threshold.Conclusion

In conclusion, the EL814S(TA) is a highly versatile optoisolator that is suitable for a wide variety of applications. Its reverse-biased semiconductor element and light-sensitive element provide excellent noise and transient protection in a wide range of systems and environments. Additionally, the common terminal ensures that the output voltage does not exceed a certain threshold, ensuring it won’t cause any damage or disruptions to the connected circuitry.

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