Orient 817c Datasheet: A Comprehensive Guide to the Optocoupler
If you are looking for a reliable and versatile optocoupler for your electronic projects, you might want to consider the Orient 817c. This device is a high-speed photocoupler that can isolate input and output signals in various applications. In this article, we will provide you with a comprehensive guide to the Orient 817c datasheet, including its features, specifications, pinout, and usage.
What is an Optocoupler?
An optocoupler, also known as an optoisolator or a photocoupler, is a device that uses light to transfer electrical signals between two isolated circuits. It consists of an infrared LED (light-emitting diode) and a photodetector, such as a phototransistor, a photodiode, or a photoresistor. The LED emits light when a voltage is applied to it, and the photodetector receives the light and converts it back to an electrical signal. This way, the input and output circuits are electrically isolated from each other, preventing noise interference, voltage spikes, or ground loops.
What is the Orient 817c?
The Orient 817c is a type of optocoupler that uses a phototransistor as the photodetector. It has four pins: two for the LED (anode and cathode) and two for the phototransistor (collector and emitter). The LED and the phototransistor are housed in a DIP-4 (dual in-line package) plastic case that provides high insulation resistance and high breakdown voltage. The Orient 817c can operate at a wide range of input currents and output voltages, making it suitable for various applications such as power supply circuits, logic circuits, signal transmission circuits, and relay driving circuits.
What are the Features of the Orient 817c?
The Orient 817c datasheet lists several features that make this optocoupler a reliable and versatile choice for your projects. Some of these features are:
High isolation voltage: The Orient 817c can withstand up to 5000 Vrms (root mean square) between the input and output terminals, ensuring high safety and protection for your circuits.
High current transfer ratio: The current transfer ratio (CTR) is the ratio of the output current to the input current. The higher the CTR, the more efficient the optocoupler is. The Orient 817c has a CTR of 50% to 600% at an input current of 5 mA and an output voltage of 5 V.
High collector-emitter voltage: The collector-emitter voltage (Vce) is the maximum voltage that can be applied across the phototransistor. The higher the Vce, the more robust the optocoupler is. The Orient 817c has a Vce of 80 V.
Low saturation voltage: The saturation voltage (Vce(sat)) is the voltage across the phototransistor when it is fully turned on. The lower the Vce(sat), the less power dissipation and heat generation in the optocoupler. The Orient 817c has a Vce(sat) of 0.4 V at an input current of 20 mA and an output current of 1 mA.