CNY17F1M

Overview

The CNY17F1M is a single-channel phototransistor optocoupler manufactured by Fairchild Semiconductor. It features an NPN phototransistor output with a collector-emitter breakdown voltage of 70V and a maximum DC forward current of 60mA. The device provides high isolation capability, rated at 4170Vrms in some documentation or up to 5000Vrms/7500Vrms depending on specific variant certification. It operates within a temperature range of -55°C to +110°C and is housed in a 6-DIP through-hole package.

Feature Summary

• Provides electrical isolation between input and output circuits using a phototransistor configuration.
• Designed for robust operation across extended industrial temperature ranges.
• Utilizes a standard through-hole DIP package for easy integration into legacy and modern PCB layouts.

Applications

• General-purpose signal isolation in digital communication interfaces
• Microcontroller input/output isolation for noise immunity
• Switching power supply feedback loops

Procurement Notes

Verify the exact isolation voltage rating (4170Vrms vs 5000Vrms) against the specific datasheet revision, as variations exist within the CNY17F family. Confirm RoHS compliance status for the specific lot, as older stock may differ from newer manufacturing runs. Check for obsolescence notices from Fairchild or its successors, as this component has been subject to discontinuation announcements.

Selection Notes

Select this component when a low-cost, general-purpose transistor-output optocoupler is required for basic isolation tasks. Ensure the 70V collector-emitter voltage meets the load requirements. Consider the CNY17F3W or similar variants if higher isolation ratings or different current transfer ratios are needed for the specific application circuit design.

Part Context

The CNY17F1M belongs to the widely used CNY17 series of phototransistor optocouplers. This family is known for providing cost-effective isolation solutions in consumer and industrial electronics. The 'F' suffix typically denotes a specific Current Transfer Ratio (CTR) bin, while 'M' often indicates tape-and-reel packaging or specific manufacturer coding, though it is frequently found in DIP tubes.

Replacement Considerations

Direct replacements include the CNY17F2M, CNY17F3M, and CNY17F4M, which share the same pinout and physical package but offer different Current Transfer Ratio (CTR) specifications. Other compatible alternatives from different manufacturers include the PC123 series or ILD series, provided the isolation voltage and CTR requirements are met.