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Product Detailed Parameters
- Description：DARLINGTON OUTPUT OPTOCOUPLER
- Series：*
- Mfr：Texas Instruments
- Package：Bulk
- Number of Channels：-
- Voltage - Isolation：-
- Current Transfer Ratio (Min)：-
- Current Transfer Ratio (Max)：-
- Turn On / Turn Off Time (Typ)：-
- Rise / Fall Time (Typ)：-
- Input Type：-
- Output Type：-
- Voltage - Output (Max)：-
- Current - Output / Channel：-
- Voltage - Forward (Vf) (Typ)：-
- Current - DC Forward (If) (Max)：-
- Vce Saturation (Max)：-
- Operating Temperature：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The TIL189-4 is a Darlington output optocoupler manufactured by Texas Instruments. It integrates an infrared-emitting diode with a high-gain Darlington phototransistor array to provide electrical isolation between input and output circuits. This component is designed for applications requiring high current transfer ratios and robust voltage isolation capabilities.
Feature Summary
- Integrates an infrared LED with a Darlington phototransistor array for high gain
- Provides electrical isolation between input control and output load circuits
- Designed for applications requiring high current transfer ratio performance
Applications
- Industrial control systems requiring signal isolation
- Power supply feedback loops
- Solid-state relay driver circuits
Procurement Notes
Verify the specific suffix '4' indicates the correct tape-and-reel or bulk packaging variant as defined in official TI documentation. Confirm that the device marking and material content reports align with the requested revision level before finalizing procurement orders to ensure compliance with project specifications.
Selection Notes
Select this component when high current transfer ratio is critical for driving loads directly from the phototransistor output. Ensure the isolation voltage rating meets the system safety requirements. Consider thermal management if operating near maximum ratings, as Darlington configurations typically exhibit higher saturation voltages compared to single transistor outputs.
Part Context
The TIL189-4 belongs to the TIL189/TIL190 family of optocouplers produced by Texas Instruments. These devices are part of a broader portfolio of optoisolators designed for general-purpose isolation tasks. The family shares similar structural designs but may vary in specific electrical characteristics or packaging options depending on the manufacturer's product line updates.
Replacement Considerations
Consult official Texas Instruments substitution guides for verified equivalents. Cross-reference pinouts and isolation ratings carefully when considering third-party alternatives to ensure functional compatibility without modifying existing circuit board layouts.
