HCPL2731

Transistor, Photovoltaic Output Optoisolators Overview

The HCPL2731 is a dual-channel logic output optocoupler manufactured by onsemi. It consists of an AlGaAs LED optically coupled to a high-gain split Darlington photodetector. The device features an integrated emitter-base resistor for superior stability over temperature and very low input current requirements. Key electrical parameters include a maximum continuous output current of 24 mA, a typical current transfer ratio of 1600% at 1.6 mA forward current, and an isolation voltage of 2500 Vrms. It operates within a temperature range of -40°C to +100°C and supports a maximum baud rate of 100 KBps.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Dual-channel configuration with integrated emitter-base resistors for enhanced thermal stability
• High gain split Darlington photodetector architecture
• Low input current operation capability

Transistor, Photovoltaic Output Optoisolators Applications

• Industrial control systems requiring galvanic isolation
• Power supply feedback loops
• Signal transmission across isolated grounds

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify component authenticity through official onsemi channels or authorized distributors. Confirm RoHS compliance status via the manufacturer's material declaration. Check for Product Change Notifications (PCN) regarding design or packaging updates. Ensure the specific package variant matches the required PCB footprint. Validate that the lot date code meets project timeline requirements.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high DC gain and low input current are critical for the application. The split Darlington output provides significant current amplification suitable for driving loads directly. Consider the 2500 Vrms isolation rating for safety-critical interfaces. Evaluate the DIP-8 package constraints against available board space. Compare performance metrics against newer alternatives if long-term availability is a concern.

Transistor, Photovoltaic Output Optoisolators Part Context

The HCPL2731 belongs to the HCPL27 series of optocouplers from onsemi. This family utilizes AlGaAs LED technology paired with specialized photodetectors to achieve high reliability. The device is part of a broader portfolio designed for industrial and commercial applications requiring robust signal isolation. It shares architectural similarities with other high-gain optocouplers in the same product line.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

The HCPL2731M is listed as a direct substitute for the HCPL2731.