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Product Detailed Parameters
- Description：AC IN-DARLINGTON OUT 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 TIL921 is a single-channel optocoupler manufactured by Texas Instruments, designed for signal isolation applications. It features an infrared-emitting diode coupled to a phototransistor output within a compact package. The device supports high-speed switching with defined rise and fall times, ensuring reliable data transmission across the isolation barrier. Key electrical characteristics include a collector-emitter voltage rating of 80 V and a forward current capability suitable for standard logic interfacing. Operating temperatures range from -40°C to +85°C, making it suitable for industrial environments.
Feature Summary
- Provides galvanic isolation between input and output circuits using infrared technology
- Integrates a single phototransistor output stage for digital signal processing
- Supports high-speed switching performance for efficient data transfer
- Compatible with standard logic families for easy system integration
Applications
- Industrial control systems requiring signal isolation
- Communication interfaces needing noise immunity
- Power supply feedback loops for safety isolation
- Microcontroller input/output protection circuits
Procurement Notes
Verify the specific suffix code against the manufacturer's latest datasheet to confirm pinout configuration and packaging type. Ensure the component meets AEC-Q100 or relevant automotive standards if used in vehicle applications. Check for RoHS compliance status prior to ordering. Confirm availability through authorized distributors to avoid counterfeit parts. Review thermal management requirements based on the specific operating environment.
Selection Notes
Select this component when single-channel isolation is required for digital signals. Consider the propagation delay and rise/fall times for high-frequency applications. Evaluate the isolation voltage rating against system safety requirements. Compare power consumption metrics with alternative optocouplers if energy efficiency is critical. Ensure the package size fits within the available PCB real estate constraints.
Part Context
The TIL921 belongs to the broader family of Texas Instruments optocouplers, which includes various channel configurations such as dual and quad options. These devices are commonly used in interface circuits where electrical isolation is necessary to protect sensitive components from high voltages. The series offers reliability and consistency in performance across different industrial and commercial applications.
Replacement Considerations
Direct substitutes may include other single-channel optocouplers from Texas Instruments or competitors like ON Semiconductor and Vishay. Verify equivalent parameters such as CTR, isolation voltage, and speed before substitution. Cross-reference pinouts to ensure compatibility with existing footprints.
