TIL197A

Overview

The TIL197A is a single-channel Darlington output optocoupler manufactured by Isocom Components. It features a plastic DIP-4 package with four through-hole pins. The device provides 5300Vrms isolation voltage between input and output circuits. It operates within a temperature range of -55°C to +100°C. Key electrical parameters include a maximum forward voltage of 1.4V, a typical rise time of 100μs, and a typical fall time of 100μs. The unit supports a maximum input current of 50mA. Current transfer ratio specifications range from a minimum of 500% to a maximum of 7500%. The component is UL recognized and complies with RoHS standards.

Feature Summary

• Darlington transistor output configuration for high gain
• AC input capability for direct line sensing
• High isolation voltage rating for safety
• Wide operating temperature range

Applications

• Mains voltage detection circuits
• Solid-state relay driver interfaces
• Industrial control system isolation
• Power supply feedback loops

Procurement Notes

Verify the specific suffix designation when ordering, as variations such as TIL197B may exist within the same series. Confirm that the required current transfer ratio bin matches your circuit design needs, given the wide specified range. Ensure the DIP-4 package footprint aligns with your PCB layout constraints. Check for RoHS compliance status if environmental regulations apply to your manufacturing process. Validate supplier authenticity to avoid counterfeit components.

Selection Notes

Select this component when AC input drive is required without additional rectification circuitry. The Darlington output provides sufficient gain for direct logic interface in many applications. Consider the slow switching speed suitable for low-frequency or DC isolation tasks. Evaluate the thermal management requirements given the wide operating temperature range. Compare isolation voltage ratings against safety standards applicable to the target equipment.

Part Context

The TIL197A belongs to the TIL197 series of optocouplers produced by Isocom Components. This series focuses on providing robust isolation for industrial and consumer applications. The manufacturer offers related variants with different output characteristics or packaging options. The component represents a standard solution for galvanic isolation in power electronics and control systems.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.