CNY17F4SM

Overview

The CNY17F4SM is a single-channel phototransistor optocoupler from Fairchild Semiconductor, featuring a Gallium Arsenide infrared emitting diode coupled with an NPN phototransistor. It provides electrical isolation in a surface-mount 6-pin SMDIP-B package. Key electrical parameters include a minimum collector-emitter breakdown voltage (BVCEO) of 70 V, a maximum forward current of 60 mA, and a maximum forward voltage of 1.65 V. The device supports a maximum power dissipation of 0.16 W and operates within a temperature range of -55°C to 100°C. It offers high insulation voltage capability and includes current transfer ratio select groups.

Feature Summary

• Provides electrical isolation between input and output circuits using optical coupling
• Features a high collector-emitter breakdown voltage for robust signal transmission
• Available in a compact surface-mount package for automated assembly
• Includes UL and VDE recognition for safety compliance

Applications

• Power supply regulators
• Digital logic inputs
• Microprocessor inputs
• Appliance sensor systems
• Industrial controls

Procurement Notes

Verify the specific suffix 'F4' corresponds to the required current transfer ratio group, as the CNY17 series utilizes select groups for gain characteristics. Confirm that the surface-mount SMDIP-B package variant matches the PCB footprint requirements. Ensure the component meets the necessary safety certification standards, such as UL or VDE, for the intended application environment. Cross-reference the manufacturer's latest datasheet to confirm active status and any potential obsolescence notices before finalizing procurement.

Selection Notes

Select this component when a single-channel transistor output optocoupler is required for low-to-medium speed digital signal isolation. The 70 V BVCEO rating makes it suitable for applications requiring moderate isolation voltage. Consider the surface-mount form factor for space-constrained designs. Verify that the input forward current and output load requirements align with the device's 60 mA max forward current and phototransistor capabilities. Ensure compatibility with the operating temperature range of -55°C to 100°C.

Part Context

The CNY17 series comprises Gallium Arsenide IREDs coupled with NPN phototransistors. The CNY17F4SM is a specific variant within this family, distinguished by its surface-mount packaging and specific gain grouping. This series is widely recognized for providing reliable galvanic isolation in various electronic circuits, balancing performance with cost-effectiveness for industrial and consumer applications.

Replacement Considerations

Equivalent parts include other 6-pin DIP or SMD transistor-output optocouplers with similar BVCEO ratings. Check pinout compatibility and current transfer ratio specifications when substituting. Variants like CNY17-4S offer through-hole alternatives.