TIL194AX

Overview

The TIL194AX is a high-density AC input phototransistor optically coupled isolator manufactured by Isocom Components. It features a single channel with a 5300Vrms isolation voltage rating, suitable for robust signal transmission across isolated circuits. The device utilizes an infrared LED paired with a phototransistor output, housed in a standard 4-pin DIP package designed for through-hole mounting. Key electrical specifications include a minimum current transfer ratio of 50% at 5mA forward current and a maximum input current of 50mA. Operating temperatures range from -55°C to 100°C, ensuring reliability in demanding environments.

Feature Summary

• AC input capability allows direct connection to alternating current signals without external rectification components.
• High isolation voltage rating provides effective electrical separation between input and output circuits.
• Phototransistor output offers high current transfer efficiency for reliable digital or analog signal switching.

Applications

• Industrial control systems requiring galvanic isolation
• Power supply feedback loops
• Signal interfacing between microcontrollers and high-voltage domains

Procurement Notes

Verify the specific ordering suffix against the manufacturer's official documentation to ensure correct packaging and variant selection. Confirm that the component status remains active before finalizing procurement plans. Cross-reference the datasheet revision date to ensure compatibility with current design requirements. Ensure storage conditions align with moisture sensitivity levels if applicable. Validate that the supplier provides genuine parts with traceable origin.

Selection Notes

Select this component when AC input detection is required without additional rectifier circuitry. Consider the 5300Vrms isolation barrier for safety-critical applications. Evaluate the 50% minimum CTR to ensure sufficient output drive capability for the load. Verify that the 4-pin DIP package fits the available PCB footprint and assembly constraints. Check thermal limits against the expected operating environment temperature range.

Part Context

The TIL194AX belongs to the TIL197 series of high-density optocouplers from Isocom Components. This series focuses on providing compact solutions for AC input applications. The device represents a standard offering in the company's portfolio of infrared optoelectronic devices, emphasizing reliability and cost-effectiveness for industrial and commercial electronic designs.

Replacement Considerations

Consult official substitution guides for compatible alternatives. Verify pinout compatibility and electrical parameters such as isolation voltage and current transfer ratio. Ensure the replacement part supports AC input functionality if required. Check package dimensions for mechanical fit within the existing assembly.

FAQ

Does the TIL194AX support direct AC input?

Yes, the device is designed with an AC input configuration, allowing it to interface directly with alternating current signals.

What is the isolation voltage rating?

The TIL194AX has an isolation voltage rating of 5300Vrms.