CNY17F1SM

Overview

The CNY17F1SM is a single-channel transistor output optocoupler manufactured by onsemi. It features an NPN phototransistor output and is housed in a 6-SMD, Gull Wing package. Key electrical parameters include a maximum collector-emitter voltage of 70 V, a maximum collector current of 50 mA, and an isolation voltage of 4170 Vrms. The device supports a forward current of 60 mA with a typical forward voltage of 1.65 V. Operating temperature ranges from -40°C to +100°C, with rise and fall times of 4 µs and 20 µs respectively.

Feature Summary

• Provides galvanic isolation between input and output circuits using an infrared LED and NPN phototransistor pair.
• Designed for surface-mount assembly in a compact 6-lead SMD configuration.
• Offers high insulation voltage capability for safe signal transmission across potential differences.

Applications

• General-purpose digital signal isolation in industrial control systems
• Interface circuits for microcontrollers and logic families
• Power supply feedback loops requiring component-level isolation

Procurement Notes

Verify the specific suffix 'SM' confirms the surface-mount gull-wing package variant rather than through-hole equivalents. Confirm RoHS compliance status as indicated in official datasheets. Ensure the ordering part number matches the required channel count and output transistor type. Cross-reference manufacturer documentation for any recent packaging or handling updates.

Selection Notes

Select this component when a surface-mount solution is required for single-channel isolation. Compare rise and fall times against system switching speed requirements. Verify that the 70 V collector-emitter voltage rating exceeds the load voltage in the application circuit. Consider thermal dissipation limits within the enclosed SMD footprint during design integration.

Part Context

This device belongs to the CNY17 series of optocouplers, which are widely used for basic isolation tasks. The 'F1' designation typically indicates specific current transfer ratio bins or performance grades within the family. The 'SM' suffix distinguishes it from standard DIP packages, adapting it for automated surface-mount production lines.

Replacement Considerations

Check for direct pin-compatible alternatives such as the CNY17F2SM if different current transfer ratio characteristics are needed. Verify that substitute components maintain the same 6-SMD gull-wing footprint and isolation voltage ratings to ensure mechanical and electrical compatibility without redesigning the PCB layout.