IL205AT

Transistor, Photovoltaic Output Optoisolators Overview

The IL205AT is a single-channel transistor output optocoupler manufactured by Vishay Semiconductor Opto Division. It integrates a gallium arsenide infrared LED with a silicon NPN phototransistor featuring a base connection, housed in an SOIC-8 package. Key electrical parameters include a maximum collector-emitter voltage of 70 V and a maximum collector current of 100 mA. The device offers a current transfer ratio ranging from 40% to 80%, with a typical rise time of 3 μs and fall time of 4.7 μs. It supports a forward current of up to 60 mA and provides an isolation voltage of 4000 Vrms. The component operates within a temperature range of -55°C to +100°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates a gallium arsenide infrared LED with a silicon NPN phototransistor for high-speed signal transmission
• Features a phototransistor with a base connection to enhance switching speed and linearity
• Provides robust electrical isolation with a 4000 Vrms insulation voltage rating
• Designed for high-density surface-mount applications using the compact SOIC-8 package

Transistor, Photovoltaic Output Optoisolators Applications

• High-density surface-mount circuit designs requiring electrical isolation
• Signal transmission interfaces in industrial control systems
• Power supply feedback loops and monitoring circuits

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix and marking code on the physical component to confirm it matches the IL205AT designation exactly. Ensure that the procurement source provides official documentation confirming the 4000 Vrms isolation rating and the specific current transfer ratio range. Cross-reference the datasheet version to ensure compliance with the latest safety certifications such as UL1577 or cUL where applicable. Confirm the package type is strictly SOIC-8 narrow to avoid compatibility issues with existing PCB footprints.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select the IL205AT when a single channel with base-connected phototransistor output is required for faster switching performance compared to standard variants. Consider this component for applications needing a 100 mA collector current capability and operation up to 100°C. Evaluate the trade-off between the higher forward current rating of 60 mA and the power dissipation limits. This part is suitable where space constraints favor the SOIC-8 package over larger through-hole options while maintaining high isolation requirements.

Transistor, Photovoltaic Output Optoisolators Part Context

The IL205AT belongs to Vishay's ILD series of optocouplers, which are designed for general-purpose isolation tasks. It shares architectural similarities with other members like the IL206AT and IL207AT but differs in channel count and specific electrical characteristics. The inclusion of a base connection on the phototransistor distinguishes it from basic transistor outputs, allowing for improved drive capabilities and reduced storage time. This places it within the category of medium-speed, high-reliability optoisolators used in modern electronic designs.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers: IL206AT, IL207AT, IL208AT.