TIL119

Overview

The TIL119 is a single-element transistor output optocoupler manufactured by Isocom Components. It features an infrared LED coupled with an NPN silicon photodarlington detector within a standard 6-pin dual in-line package. The device provides high isolation capability of 5300Vrms between input and output circuits. Key electrical parameters include a minimum collector-emitter breakdown voltage of 30V, a typical rise and fall time of 300µs, and a maximum forward current of 0.05A. The nominal current transfer ratio is specified at 320%, with a maximum dark current of 100nA.

Feature Summary

• Integrates an infrared light emitting diode with an NPN silicon photodarlington for efficient optical coupling
• Provides robust electrical isolation between input and output circuits to protect sensitive components
• Designed for high reliability applications requiring stable signal transmission across isolated domains

Applications

• General purpose electrical isolation in industrial control systems
• Signal interfacing between microprocessors and power switching circuits
• Noise immunity enhancement in data communication lines

Procurement Notes

Verify the specific manufacturer designation when sourcing, as Isocom Components may operate under different legal entity names such as Isocom Components 2004 LTD or Isocom LTD. Ensure the component matches the official datasheet specifications for pinout and electrical ratings. Confirm that the package type corresponds to the standard 6-pin DIP configuration required for your PCB layout. Cross-reference part numbers carefully to avoid confusion with similar Darlington output devices from other manufacturers.

Selection Notes

Select this component when a high current transfer ratio is required to drive loads directly without additional amplification stages. The photodarlington output offers higher gain compared to standard transistor outputs, making it suitable for low input current applications. Consider the 5300V isolation rating for safety-critical designs. Evaluate the 300µs switching speed to ensure it meets the timing requirements of your application, as this is slower than high-speed logic isolators.

Part Context

The TIL119 belongs to the family of optically coupled isolators produced by Isocom Components. These devices are widely used in environments where galvanic isolation is necessary to prevent ground loops and protect low-voltage control circuitry from high-voltage transients. The use of a photodarlington output distinguishes it from lower-gain alternatives, providing enhanced sensitivity for the infrared input signal.

Replacement Considerations

Direct replacements must maintain the 6-pin DIP package and Darlington output configuration. Verify that substitute parts offer comparable isolation voltage and current transfer ratio. Check for pin-to-pin compatibility to ensure seamless integration into existing designs without PCB modifications.