EL217(TA)

Output Type:	Transistor with Base
Supplier Device Package:	8-SOP
Package / Case:	8-SOIC (0.154", 3.90mm Width)
Mounting Type:	Surface Mount
Operating Temperature:	-55°C ~ 110°C
Vce Saturation (Max):	400mV
Current - DC Forward (If) (Max):	60mA
Voltage - Forward (Vf) (Typ):	1.3V
Current - Output / Channel:	--
Voltage - Output (Max):	80V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	1.6µs, 2.2µs
Turn On / Turn Off Time (Typ):	3µs, 3µs
Current Transfer Ratio (Max):	--
Current Transfer Ratio (Min):	100% @ 1mA
Voltage - Isolation:	3750Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic Output: EL217(TA) Application Field and Working Principle

Optoisolators, also referred to as optocouplers, are isolation devices that use a light source to share information between two circuits. Among the different types of optoisolators are the Transistor, Photovoltaic Output type such as the EL217(TA) Optoisolator. This type of optoisolator is used in applications that require the utilization of a low current transistor output driver. The EL217(TA) has an output voltage of 10 to 80 volts, making it a commonly used selection in a variety of applications.

EL217(TA) Application Field

The EL217(TA) is characteristically known as an exemplary optoisolator due to its low cost, small package size, and dependable electrical parameters. The EL217(TA) is typically employed in industrial, automotive, and military applications. Industrial uses include power supplies, communication circuits, and process control. The EL217(TA) is also commonly used in automotive controllers such as fuel injection and wheel angle sensors. Finally, the EL217(TA) has been selected for use in military applications due to its high electrical insulation and its ability to shake off intense shock and vibration.

EL217(TA) Working Principle

When the EL217(TA) optoisolator is receiving an input signal from an external source, like a microcontroller, it absorbs it through a light emitting diode (LED) to a phototransistor. The LED is fed a ground plus a high voltage current source, and the output of the LED is transferred and amplified by the phototransistor.An advantage of the EL217(TA) is that it is able to send as well as receive current signals, making it easier for external signals to be used by the optoisolator. For instance, when a digital signal, like a “1” or a “0”, is sent to the optoisolator then it is amplified by the transistor side which will output the same signal as the input as long as the desired level of current is sustained.The EL217(TA) also includes additional features such as current limiting, which prevents the electrical circuit from being damaged due to excessive current flow. Through this protection feature, the EL217(TA) not only ensures electrical safety, but also increased lifetime of the device.

Conclusion

The EL217(TA) optoisolator is a dependable and cost effective optoisolator, which offers superb isolation to a host of applications ranging from industrial to automotive and military. The low current transistor output of the EL217(TA) enables the signal applications to run efficiently and with safety from electrical overload. With its array of features, the EL217(TA) is the perfect selection for isolating electrical signals to secure circuits and its dependable operation.

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