The TLV-817 is a series of high-isolation voltage SMD transistor optocouplers manufactured by Lite-On Inc. These optocouplers feature a gallium arsenide (GaAs) infrared emitting diode which is optically coupled to a silicon phototransistor. These devices are packaged in a small outline SMD package and are ideal for applications requiring electrical isolation between input and output circuits.

Applications:

• Digital logic input isolation.
• Microprocessor input/output isolation.
• Noise isolation in signal transmission.
• Power supply feedback control.
• Industrial control systems.

Features:

• High Isolation Voltage: Provides a high level of electrical isolation between the input and output circuits (typically 3750 Vrms or higher).
• SMD Package: Designed for surface mounting on PCBs, facilitating automated assembly.
• Compact Size: Small footprint for high-density board layouts.
• CTR (Current Transfer Ratio): Various CTR grades are available to suit different application needs.
• Fast Switching Speed: Enables high-speed data transmission.
• RoHS Compliant: Free from hazardous substances.

Benefits:

• Enhanced Safety: Provides reliable electrical isolation to protect circuits and users from high voltages.
• Easy Assembly: Simplifies manufacturing processes due to its SMD design.
• Space Saving: Allows for compact and miniaturized product designs.
• Design Flexibility: Offers a variety of CTR options for optimized circuit performance.
• Improved Signal Integrity: Reduces noise and interference in signal transmission.

Additional Details:

The TLV-817 series comes in different CTR (Current Transfer Ratio) grades, which specify the ratio of the output current to the input current. The forward voltage, collector-emitter voltage, and operating temperature range are critical parameters to consider during the design process. The device's datasheet provides detailed information on these and other specifications, including soldering profiles and package dimensions.

Specific applications may require different CTR ranges, so selecting the appropriate TLV-817 variant is essential for optimal performance and efficiency. Consult the official Lite-On Inc. datasheet for precise specifications and application notes.