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CNY74-2 IC 2 Channel Optocoupler with Phototransistor IC
The CNY74-2 is a dual-channel optocoupler that integrates two independent infrared LEDs and two NPN phototransistor outputs inside a single 8-pin DIP package.
It provides electrical isolation between input and output stages, commonly used to protect microcontrollers, logic circuits, and low-voltage electronics from high-voltage or noisy signals.
The “-2” grade indicates a medium CTR (Current Transfer Ratio) level suitable for general-purpose isolation and logic interfacing.
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Features:-
- CNY74-2 includes 2 isolator channels
- DC isolation test voltage VIO = 2.5 kV
- Test class 25/100/21 DIN 40 045
- Low coupling capacitance of typical 0.3 pF
- Current Transfer Ratio (CTR) of typical 100%
- Low temperature coefficient of CTR
- Wide ambient temperature range
Specification:-
| Symbol | Parameter | Value | Unit |
| VR | Reverse voltage | 6 | V |
| IF | Forward current | 60 | mA |
| IFSM | Surge current | 1.5 | A |
| PV | Power dissipation | 100 | mW |
| VCEO | Collector-emitter breakdown voltage | 70 | V |
| VEBO | Emitter-base breakdown voltage | 7 | V |
| IC | Collector current | 100 | mA |
| TJ | Junction temperature | 125 | °C |
| ICM | Peak collector current | 100 | mA |
Advantages
- Two optocouplers in a single compact package
- Saves PCB space and component count
- Strong electrical isolation between low-voltage and high-voltage circuits
- Good noise immunity
- Easy to interface with microcontrollers and logic systems
- Low cost and highly reliable
Applications
- Dual-channel signal isolation
- Microcontroller input protection
- Switch-mode power supply (SMPS) feedback
- AC mains voltage monitoring (with resistors/conditioning)
- PLC and industrial control signals
- Relay driver isolation
- Motor control circuits
- Low-frequency PWM and ON/OFF isolation
- Logic level shifting with isolation
- Noise reduction in sensor circuits
*Product image for illustration purposes only, actual product may vary.
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