CNY1723SD

Transistor, Photovoltaic Output Optoisolators Overview

The CNY1723SD is a transistor output optocoupler manufactured by onsemi. It features an NPN phototransistor with a base terminal, housed in a 6-SMD (SM-DIP6) package. The device utilizes an aluminum gallium arsenide (AlGaAs) infrared LED for optical coupling. Key electrical specifications include a collector-emitter breakdown voltage (BVceo) of 80 V, a forward current (If) rating of 90 mA, and a forward voltage (Vf) of 1.5 V. It provides an isolation voltage of 7500 Vrms.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Integrates an NPN phototransistor with a dedicated base terminal for enhanced control and switching speed capabilities.
• Utilizes an AlGaAs infrared LED emitter to provide high-efficiency optical coupling between input and output circuits.
• Offers high isolation voltage capability of 7500 Vrms for robust signal transmission across isolated domains.

Transistor, Photovoltaic Output Optoisolators Applications

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

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix 'SD' confirms the 6-SMD package configuration and tape-and-reel or tube availability as per the manufacturer's latest documentation. Confirm that the component meets required safety standards such as UL, CSA, and VDE certifications for the intended application environment. Check for any obsolescence notices or lifecycle status updates directly from onsemi before finalizing procurement plans.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when a phototransistor output with a base pin is required for faster switching or external biasing compared to standard base-less variants. Ensure the 80 V collector-emitter voltage rating exceeds the maximum load voltage in the circuit. Verify that the 6-SMD footprint matches the PCB design constraints and that the 7500 Vrms isolation rating satisfies the system's creepage and clearance requirements.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the CNY17 family of transistor output optocouplers, which are widely used for general-purpose isolation. The CNY1723SD specifically denotes the variant with a base terminal and SMD packaging, distinguishing it from through-hole DIP versions like the CNY172. It serves as a cost-effective solution for basic isolation tasks where high-speed performance is not the primary requirement.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct replacements may include other CNY17 series variants with compatible pinouts and electrical ratings, such as the CNY171SD or CNY173SD, provided the base terminal functionality is not critical. Cross-reference with equivalent parts from other manufacturers offering 6-SMD transistor optocouplers with similar BVceo and If ratings.