CNY17-4 IC Optocoupler IC DIP 6 Package

CNY17-4 IC Optocoupler IC DIP 6 Package

The CNY17-4 is a phototransistor-based optocoupler designed for electrical isolation between high-voltage and low-voltage circuits. It contains an infrared LED input and an NPN phototransistor output inside a 6-pin DIP package.

Among the CNY17 series (-1, -2, -3, -4), the CNY17 4 has the highest CTR (Current Transfer Ratio), making it ideal for interfacing where very low input LED current still needs to generate a strong output signal.

It is widely used in control circuits, industrial electronics, and microcontroller isolation systems.

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Key Features

• Highest CTR among CNY17 family: 160% to 320%
• High isolation voltage: up to 5 kV RMS
• NPN phototransistor output
• Low input LED drive current
• Standard 6-pin DIP package
• Low noise and EMI immunity
• Wide operating temperature range
• Low cost and reliable for general-purpose isolation

Advantages

• Works with very low input current
• High CTR ensures strong output even with weak LED drive
• Excellent for low-power control circuits
• Reliable for industrial applications
• Provides strong electrical isolation

Applications

• Microcontroller input isolation
• Low-power signal transfer across isolation barrier
• SMPS feedback circuits
• Triac/thyristor gate triggering
• Industrial control systems
• Motor control feedback
• Isolation in ADC/DAC circuits
• AC mains detection circuits
• Noise-sensitive electronics
• Relay driving with isolation

CNY17 Datasheet