TIL923

Overview

The TIL923 is a quad-channel optocoupler manufactured by Texas Instruments, designed for high-speed digital signal isolation. It integrates four independent light-emitting diodes with phototransistor detectors within a single package to provide electrical isolation between input and output circuits. The device supports multiple channel configurations, including single, dual, and quad arrangements, making it suitable for applications requiring compact isolation solutions. Key electrical characteristics include a typical propagation delay of 1 microsecond and a common-mode transient immunity of 10 kV/µs, ensuring reliable data transmission in noisy environments while maintaining galvanic isolation.

Feature Summary

• Provides electrical isolation through integrated LED and phototransistor pairs
• Supports flexible configuration as single, dual, or quad channel devices
• Features high common-mode transient immunity for noise rejection
• Designed for fast switching speeds with low propagation delay

Applications

• Industrial communication bus interfaces
• Digital isolation in measurement systems
• Signal coupling in control logic circuits
• Isolated data transmission in embedded systems

Procurement Notes

Verify the specific suffix code on the component marking to confirm the exact channel configuration and package variant, as the base part number covers multiple options. Ensure the selected variant matches the required pinout and isolation voltage specifications for the target application. Cross-reference the manufacturer's latest datasheet to confirm active status and compliance with current environmental standards before finalizing procurement.

Selection Notes

Select the TIL923 variant based on the required number of isolated channels and the specific package type needed for the PCB layout. Consider the operating temperature range and isolation voltage requirements when choosing between available options. Verify that the propagation delay and bandwidth meet the timing constraints of the digital signals being transmitted. Ensure compatibility with the driving circuitry and load requirements of the receiving end.

Part Context

The TIL923 belongs to a family of quad-channel optocouplers from Texas Instruments, which also includes variants like the TIL923A, TIL924, and TIL925. These components are part of TI's broader portfolio of isolation devices, offering solutions for various digital isolation needs. The family is characterized by its ability to provide multiple isolated channels in a compact form factor, supporting efficient design of complex electronic systems requiring robust signal integrity.

Replacement Considerations

Direct substitutes may include other quad-channel optocouplers from Texas Instruments such as the TIL923A or TIL924, provided they match the pinout and electrical specifications. Alternative manufacturers' parts should be evaluated for equivalent isolation voltage, propagation delay, and package dimensions to ensure mechanical and functional compatibility without redesigning the host circuit.