EL817(S)(TB)

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):	600% @ 5mA
Current Transfer Ratio (Min):	50% @ 5mA
Voltage - Isolation:	5000Vrms
Number of Channels:	1
Part Status:	Discontinued at Digi-Key
Packaging:	Tape & Reel (TR)

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Optoisolators are a type of electronic or electro-mechanical component mainly used to provide electrical isolation between two parts of a circuit. Among these components, there are a variety of devices based on the transistor and photovoltaic output, including the EL817(S)(TB) type. The EL817(S)(TB) optoisolator is a type of non-dissipative optical output device in the 8-pin dual inline package (DIP) format. This device is able to provide optic isolation of up to 1500 volts Transient peak isolation Voltage (Vpk) at a maximum supply voltage of 10.58V DC (Max.). Its dimensions are 18.9 x 6.35 x 4.2 mm. The EL817(S)(TB) features a 1000:1 current transfer ration (CTR), low forward voltage input of 1.7 V typical and a low 0.2µA leakage current at 10V. When used in the recommended operating conditions, the isolation voltage is between 500 V RMS minimum and 1000 V RMS maximum. The device offers a 85 dB minimum common mode rejection ratio (CMRR) at 60 Hz and a propagation delay of 2µs typical. The EL817(S)(TB) optoisolator has an operating temperature range between –40°C and +85°C. It is built with a photovoltaic transistor output, where the base on the transistor output is connected to the internal LED. The LED, which acts as the input, is driven by the photodetector of the sensor and is isolated from the other inputs and outputs of the device. In its working principle, the EL817(S)(TB) optoisolator operates by converting the input signals from the photodiode into electrical signals in the collector of the transistor output. The output current is dependent on the input current applied to the photodetector. The current transfer ratio property enables the device to react to small changes on the input side and output bigger changes on the other side.The EL817(S)(TB) optoisolator can be used in various applications and circuit designs. Some of the common features where it can be employed include measurement and control circuits, high voltage or hazardous area detectors, motor control, automotive switches, filters, linear and digital circuits, and multiple switching mechanisms. Its optically-coupled isolation makes it ideal for isolating AC line signals from the circuits. The EL817(S)(TB) optoisolator also features various protection properties that make the device inherently safe, such as low power dissipation, short protection between the input and output, and transistor clamp for load protection. These features make the device suitable for various applications and industries. The EL817(S)(TB) optoisolator provides great flexibility for the designer who needs a small, versatile, reliable, and safety-optimized solution for isolation and signal-level conversion. With its widely-used features, library components, and operating properties, it is a reliable and cost-effective component for various circuit designs.

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