LTV-817D

The LTV-817D is an optocoupler, also known as an opto-isolator, manufactured by Lite-On. It is designed to provide electrical isolation between its input and output, making it ideal for applications where signal integrity and safety are paramount.

Key Features:

1. Isolation Voltage: The LTV-817D typically offers a high isolation voltage, often around 5,000 Vrms, which ensures that the input and output circuits are electrically isolated from each other. This is crucial for protecting sensitive components from high voltages.

2. Input Configuration: The device features an infrared LED as its input component. When a current flows through the LED, it emits infrared light, which is the basis for the optocoupling mechanism.

3. Phototransistor Output: The output side of the LTV-817D consists of a phototransistor that is sensitive to the infrared light emitted by the LED. When the LED is activated, the phototransistor conducts, allowing current to flow through the output circuit.

4. Package Type: The LTV-817D is typically housed in a compact 4-pin DIP (Dual In-line Package) configuration, making it easy to integrate into various circuit designs. The small size allows for efficient use of PCB space.

5. Operating Temperature Range: The device is designed to operate within a wide temperature range, often from -40°C to +85°C, making it suitable for various environmental conditions.

6. Current Transfer Ratio (CTR): The LTV-817D has a specified current transfer ratio, which indicates the efficiency of the optocoupler in transferring input current to output current. This ratio can vary based on the specific conditions of use.

7. Applications: The LTV-817D is commonly used in applications such as signal isolation, data communication, power supply feedback, and interfacing between different voltage levels. It is particularly useful in industrial automation, telecommunications, and consumer electronics.

8. Electrical Characteristics: The device typically has a forward voltage drop across the LED of around 1.2V at a specified forward current, and the phototransistor can handle a collector-emitter voltage of up to 30V.

Summary:

The LTV-817D from Lite-On is a versatile and reliable optocoupler that provides essential electrical isolation in various electronic applications. Its compact design, high isolation voltage, and robust performance make it a popular choice for engineers looking to ensure safety and signal integrity in their designs.