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The TLG321 is a high-speed optocoupler manufactured by Toshiba. Below are the factual specifications, descriptions, and features:

Specifications:

• Isolation Voltage: 5000 Vrms (min)
• Operating Temperature Range: -55°C to +100°C
• Input Forward Current (IF): 16 mA (max)
• Reverse Voltage (VR): 5 V (max)
• Output Collector-Emitter Voltage (VCEO): 30 V (min)
• Output Emitter-Collector Voltage (VECO): 7 V (max)
• Collector Current (IC): 8 mA (max)
• Current Transfer Ratio (CTR): 50% (min) at IF = 5 mA
• Switching Speed (Turn-On Time / Turn-Off Time): 4 μs / 3 μs (typical)
• Package Type: DIP-4

Descriptions:

• The TLG321 is a high-speed optocoupler consisting of a GaAlAs infrared LED optically coupled to a phototransistor.
• It provides electrical isolation between input and output circuits, making it suitable for noise suppression and signal transmission in industrial and communication applications.

Features:

• High-Speed Response: Optimized for fast switching applications.
• High Isolation Voltage: Ensures reliable signal isolation.
• Compact DIP-4 Package: Space-efficient design.
• Wide Operating Temperature Range: Suitable for harsh environments.
• Compliant with Safety Standards: Meets UL, cUL, and VDE certifications.

This information is based on Toshiba's official datasheet for the TLG321 optocoupler.