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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 TIL917B is a single-channel optocoupler manufactured by Texas Instruments. It integrates a gallium-arsenide infrared light-emitting diode with a silicon NPN Darlington phototransistor. The device provides high isolation voltage, specified at 5300V RMS in official documentation. It operates within a standard temperature range and utilizes an 8-pin DIP package for through-hole mounting.
Feature Summary
- Integrates a gallium-arsenide LED with a silicon NPN Darlington phototransistor for signal transmission
- Provides high electrical isolation between input and output circuits
- Designed for reliable operation in digital and analog switching applications
Applications
- Digital isolation interfaces
- Solid-state relay drivers
- Microcontroller input/output isolation
Procurement Notes
Verify the specific suffix 'B' to ensure correct current transfer ratio binning, as the TIL917 family includes variants A, B, and C with different performance characteristics. Confirm the package type matches the required PCB footprint. Check for RoHS compliance status if environmental regulations apply to the final assembly.
Selection Notes
Select this component when high isolation voltage is required for a single channel. The Darlington configuration offers high current gain but slower switching speeds compared to standard phototransistors. Ensure the application does not require high-frequency response, as the internal capacitance limits bandwidth.
Part Context
This component belongs to the TIL917/TIL918/TIL919 series of optocouplers from Texas Instruments. These devices are designed for general-purpose isolation tasks. The TIL917 variant specifically refers to the single-channel configuration, distinguishing it from dual or quad-channel counterparts in the same product family.
Replacement Considerations
Compatible substitutes include TIL917A and TIL917C, which share the same pinout and basic structure but differ in current transfer ratio specifications. Verify that the alternative bin meets the minimum CTR requirements of the circuit design.
