TLP291-4 Toshiba Transistor Output Optocoupler SMD SOIC 16 Package

TLP291-4 Toshiba Transistor Output Optocoupler SMD SOIC 16 Package 

The TLP291-4 is a quad-channel transistor output optocoupler from Toshiba, integrating four infrared LEDs and four phototransistor outputs in a compact SOIC-16 SMD package.
It is designed to provide high electrical isolation between input and output circuits, ensuring safe and noise-free signal transmission in both consumer and industrial electronics.

With its low input current, wide CTR (Current Transfer Ratio), and excellent temperature stability, the TLP291-4 is well suited for low-power and high-density PCB applications.
Its SMD construction supports automated reflow soldering, making it ideal for modern manufacturing environments.

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Features

• Quad-channel (4-channel) optocoupler
• Compact SOIC-16 SMD package
• Phototransistor output for easy interfacing
• High isolation voltage (typically 3750 Vrms)
• Low input forward current
• Wide CTR range for flexible design
• High noise immunity
• Fast switching response for digital signals
• Suitable for automated SMT assembly
• RoHS compliant

Applications

• Microcontroller and logic signal isolation
• Multi-channel digital isolation systems
• Switching power supply (SMPS) feedback circuits
• Industrial automation and control
• Home appliances and smart electronics
• Relay, MOSFET, and transistor driver circuits
• Sensor signal conditioning and isolation
• Noise filtering in communication interfaces
• General-purpose signal isolation

TLP291-4 Datasheet