TIL191XSM

Overview

The TIL191XSM is a single-channel optoisolator manufactured by Isocom Components. It features a surface-mount package with four pins, designed for high-density mounting applications. The device integrates an infrared light-emitting diode and an NPN silicon phototransistor to provide electrical isolation between input and output circuits. Key electrical specifications include a maximum forward voltage of 1.4V and a maximum input current of 50mA. The unit offers a high isolation voltage rating of 5300Vrms. Typical switching characteristics consist of a rise time of 100μs and a fall time of 100μs. The component operates within a temperature range from -55°C to 100°C.

Feature Summary

• Integrates infrared LED and NPN silicon phototransistor for signal isolation
• Provides high-voltage electrical isolation between input and output channels
• Designed for high-density surface-mount PCB assembly

Applications

• Industrial control systems requiring signal isolation
• Power supply units needing feedback loop isolation
• Communication equipment interface circuits

Procurement Notes

Verify the specific suffix XSM confirms the surface-mount configuration and pinout compatibility with your design. Ensure the supplier provides official datasheets confirming the 5300Vrms isolation rating and operating temperature range. Cross-reference the manufacturer part number to avoid confusion with through-hole variants like the TIL191. Confirm compliance with relevant safety standards such as UL certification before finalizing procurement.

Selection Notes

Select this component when a compact surface-mount solution is required for galvanic isolation in low-speed digital signals. Consider the 100μs switching speed suitability for your application frequency. Evaluate the 5300Vrms isolation barrier against your system's voltage requirements. Compare the physical dimensions of the 4-pin SMD package against available board space constraints relative to other optocoupler families.

Part Context

The TIL191XSM belongs to the TIL197 series family of optocouplers produced by Isocom Components. This series is engineered to replace common commercial optocouper standards while offering specialized parameter selection. The component utilizes standard infrared technology to ensure reliable performance across various industrial and commercial environments.

Replacement Considerations

Public confirmed substitute part numbers are not explicitly documented in the provided source material.