TIP111

Single Bipolar Transistors Overview

The Fairchild Semiconductor TIP111 is a general-purpose, six-pin phototransistor optocoupler. It integrates a gallium arsenide infrared emitting diode with a silicon phototransistor within a dual in-line package. This configuration provides electrical isolation between input and output circuits while transmitting signals via light. The device is designed for applications requiring reliable signal transfer across isolated domains, such as power supply regulation and digital logic interfacing.

Single Bipolar Transistors Feature Summary

• Integrates a gallium arsenide infrared LED driver with a silicon phototransistor output
• Provides electrical isolation in a standard six-pin dual in-line package
• Compatible with standard TTL integrated circuits

Single Bipolar Transistors Applications

• Power supply regulators
• Digital logic inputs
• Microprocessor inputs
• Appliance sensor systems
• Industrial controls

Single Bipolar Transistors Procurement Notes

Verify the specific ordering suffix when sourcing replacements. Suffixes such as -M indicate white packaging, while V denotes VDE recognition for the white variant. Ensure the required insulation certification matches the project specifications before procurement to avoid compatibility issues with regulatory standards.

Single Bipolar Transistors Selection Notes

Select this component for designs requiring galvanic isolation between low-voltage control logic and higher-power or noisy environments. The phototransistor output suits direct interfacing with TTL logic families. Consider thermal management and isolation voltage ratings relative to the specific application environment during the design phase.

Single Bipolar Transistors Part Context

The TIP111 belongs to a family of general-purpose optocouplers manufactured by Fairchild Semiconductor. It shares functional similarities with the TIL111 and MOC8100, utilizing identical internal structures of an infrared emitter and silicon phototransistor. These devices are widely used in industrial and consumer electronics for signal isolation.

Single Bipolar Transistors Replacement Considerations

Direct substitutes include the TIL111 and MOC8100 from Fairchild. Other manufacturers producing equivalent 6-pin phototransistor optocouplers may serve as alternatives if pinout and electrical characteristics align with the original design requirements.