TIL191AXG

Overview

The TIL191AXG is a single-channel optocoupler manufactured by Isocom Components 2004 LTD. It features an infrared LED input and an NPN silicon phototransistor output housed in a 4-DIP package. The device provides electrical isolation with a maximum rating of 5300Vrms. Key electrical parameters include a minimum current transfer ratio of 50% at 5mA input current, and typical rise and fall times of 6µs each. The input type is specified as DC.

Feature Summary

• Integrates an infrared light emitting diode with an NPN silicon phototransistor for signal transmission.
• Provides high-density mounting capability within a compact 4-pin DIP form factor.
• Ensures electrical isolation between input and output circuits via optical coupling.

Applications

• General purpose signal isolation
• DC to DC conversion control
• Solid-state relay driver circuits

Procurement Notes

Verify the specific manufacturer designation when sourcing, as Isocom Components 2004 LTD may distribute products originally designed under other brand names such as Texas Instruments. Confirm that the 4-DIP package configuration matches the required PCB footprint. Ensure compliance with regional safety standards applicable to the 5300Vrms isolation rating before integration into final equipment designs.

Selection Notes

Select this component when a low-cost, general-purpose transistor output isolator is required for single-channel applications. The 4-pin DIP package suits through-hole assembly processes. Consider the 6µs switching speed adequate for standard digital logic interfacing. Verify that the 50% minimum CTR meets the drive requirements of the downstream load circuitry at the intended operating temperature range.

Part Context

This part belongs to the family of transistor-output optocouplers designed for basic isolation tasks. It utilizes a standard 4-pin dual in-line package, distinguishing it from wider 6-pin or surface-mount variants. The technology relies on direct infrared coupling without additional internal amplification stages found in higher-speed or logic-gate output devices.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Cross-referencing with original design manufacturers may be necessary if supply chain constraints exist, but functional equivalence must be verified against pinout and isolation voltage specifications.