The EL817S1(C)(TU)-F is a single-channel phototransistor optocoupler manufactured by Everlight Electronics Co. Ltd. This device consists of an infrared emitting diode optically coupled to a phototransistor in a small outline package. It is designed for applications requiring electrical isolation between input and output circuits.

Applications

• Programmable Controllers: Used for isolating input/output signals.
• Telecommunication Equipment: Provides isolation in telecom interfaces.
• Office Automation Equipment: Used in devices like printers and copiers for signal isolation.
• Home Appliances: Found in appliances requiring electrical isolation for safety.
• Switching Mode Power Supplies (SMPS): Used for feedback control and isolation.

Features

• Current Transfer Ratio (CTR): Specified CTR allows for predictable signal transfer.
• High Isolation Voltage: Provides a high degree of electrical isolation between the input and output.
• Compact Package: Small outline package (SOP) saves board space.
• Operating Temperature Range: Wide operating temperature range suitable for various environments.
• Compliance: RoHS compliant, ensuring environmental friendliness.

Benefits

• Electrical Isolation: Protects sensitive circuits from high voltages and transients.
• Signal Transmission: Enables reliable signal transmission across different voltage domains.
• Noise Immunity: Reduces noise coupling between circuits.
• Compact Design: Allows for use in space-constrained applications.
• Long Lifespan: Provides a durable and reliable isolation solution.

Additional Details

The EL817 series is a widely used optocoupler family, known for its reliability and performance. The 'S1' variant indicates a specific CTR rank. The (C) likely denotes a packaging variation. The (TU)-F likely relates to tape and reel packaging for automated assembly and lead-free finishing. Key specifications to consider when selecting this optocoupler include the forward current (IF), collector-emitter voltage (VCEO), and isolation voltage (Viso). Consult the datasheet for detailed electrical characteristics and application guidelines.