EL817(S1)(C)(TD)

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:	50mA
Voltage - Output (Max):	35V
Series:	--
Input Type:	DC
Rise / Fall Time (Typ):	4µs, 3µs
Turn On / Turn Off Time (Typ):	--
Current Transfer Ratio (Max):	400% @ 5mA
Current Transfer Ratio (Min):	200% @ 5mA
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Optoisolators - Transistor, Photovoltaic Output

Optoisolators, also known as optocouplers, are devices used to electrically isolate two signals, even when they are operating at different voltages. The EL817 (S1)(C)(TD) optoisolators are semiconductor devices that contain a light emitting diode (LED) and a photodetector (usually a transistor) in one package. They are specifically designed to transfer electrical signals between two circuits that are separated from each other. As these devices operate based on optical signaling, they can provide an effective way to protect circuits that may be sensitive to electrical noise or spikes.

Application Field

EL817 (S1)(C)(TD) optoisolators are ideal to be used in general-purpose digital and analog signal isolation applications such as and noise/spike suppression, signal driving, level shifting, ESD protection, and AC/DC automatic conversion. They can also be used to protect electronic systems from overvoltage, as well as in operational amplifiers, pulse generators, digital-to-analog converters, analog-to-digital converters, etc.

Working Principle

The EL817 (S1)(C)(TD) optoisolators typically operate on the basis of a transmitter (usually an LED) connected to one circuit, and of a receiver (a photo transistor) connected to the other. The internal circuitry is designed to provide direct separation between the two circuits, thus providing reliable isolation of the signals being transferred. The LED transmits a light signal across the isolation barrier to the photo transistor, when the input to the LED is above its minimum threshold voltage. The light received is then converted into an electrical signal in the receiver. This way, the signal is transmitted without any contact between the two circuits, providing an effective separation between them.Since the LED and the photo transistor are connected in the same package, potential areas of failure and noise interference are minimized. As a result, these devices can provide reliable noise and spike suppression and high ESD protection, preventing spurious signals between the transmitter and the receiver. In addition, the EL817 (S1)(C)(TD) optoisolators boast a wide operating temperature range and a robust design, offering excellent performance for all kinds of applications. They also feature a wide variety of shapes and sizes to fit into any device.

Conclusion

The EL817 (S1)(C)(TD) optoisolators are specifically designed to provide reliable isolation between two circuits. They are equipped with a light emitting diode (LED) and a photodetector (usually a transistor) in one package, delivering effective noise and spike suppression and high ESD protection. These devices can be used in general-purpose digital and analog signal isolation applications such as and noise/spike suppression, signal driving, level shifting, ESD protection, and AC/DC automatic conversion. In addition, they feature a wide temperature range and a robust design, making them an ideal choice for many applications.

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