The LTV-847B is a quad-channel phototransistor optocoupler from Lite-On Inc. It features four gallium arsenide infrared emitting diodes optically coupled to silicon planar phototransistors. This arrangement provides electrical isolation between the input and output sides, making it suitable for applications where multiple signals need to be isolated without direct electrical connection.

Applications:

• Programmable Logic Controllers (PLCs): Isolation of multiple input/output channels.
• Industrial Control Systems: General-purpose isolation in industrial automation equipment.
• Data Acquisition Systems: Simultaneous isolation of multiple data channels.
• Power Supplies: Providing isolated feedback control in multi-output power supplies.
• Motor Control: Isolation for multiple motor control signals.

Features:

• Quad-Channel: Four independent isolation channels in a single package.
• High Isolation Voltage: Robust electrical isolation between input and output circuits.
• Compact Package: Space-saving design for high-density applications.
• High Current Transfer Ratio (CTR): Efficient signal transfer across the isolation barrier.
• RoHS Compliant: Complies with environmental protection standards.

Benefits:

• Space Savings: Quad-channel design reduces board space requirements.
• Electrical Isolation: Protects sensitive circuits from voltage spikes and surges.
• Improved Reliability: Reduces the risk of component failure due to electrical noise.
• Simplified Circuit Design: Simplifies design by integrating multiple isolation channels.
• Enhanced Safety: Isolates high-voltage and low-voltage circuits for safety.

Additional Details:

The LTV-847B typically comes in a 16-pin DIP package. Each channel includes an infrared LED and a phototransistor. When current passes through the LED, it emits infrared light, activating the phototransistor and allowing current to flow in the output circuit. Key specifications include isolation voltage, CTR, forward current, and collector-emitter voltage. The device is designed for through-hole mounting.