HCPL-5731

Transistor, Photovoltaic Output Optoisolators Overview

The HCPL-5731 is a dual-channel, hermetically sealed logic output optocoupler manufactured by Broadcom Limited. It features an open collector Darlington output configuration housed in an 8-pin DIP package. Key electrical parameters include a current transfer ratio of 1500%, an insulation voltage of 1500 Vrms, and a maximum continuous output current of 40 mA. The device operates with a forward current of 5 mA, a forward voltage of 1.7 V, and a reverse voltage rating of 5 V. Power dissipation is rated at 200 mW, with an operating temperature range spanning from -55°C to +125°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Hermetically sealed ceramic construction for high reliability
• Dual channel isolation with open collector outputs
• High current transfer ratio capability
• Space qualified design suitable for harsh environments

Transistor, Photovoltaic Output Optoisolators Applications

• Military electronic systems
• Aerospace instrumentation
• High reliability industrial control
• Spacecraft communication interfaces

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific ordering suffix to confirm package type and lead finish, as variations exist within the series. Ensure the component meets Class H requirements if used in radiation-hardened applications. Confirm hermetic seal integrity through appropriate testing protocols before integration into critical flight or military hardware. Check datasheet revisions for updated thermal and electrical limits.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high isolation voltage and long-term reliability are required in space-constrained designs. The dual-channel configuration reduces board space compared to single-channel alternatives. Consider the Darlington output's higher current drive capability versus standard transistor outputs. Evaluate the ceramic package's thermal performance against plastic alternatives for high-temperature stability.

Transistor, Photovoltaic Output Optoisolators Part Context

This part belongs to the HCPL-5731 series of high-reliability optocouplers. It is designed for Class H applications requiring hermetic sealing. The series includes single, dual, and quad channel variants. Broadcom markets these devices for aerospace and defense sectors where failure is not an option. The 8-pin DIP form factor ensures compatibility with legacy mounting techniques.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Direct substitutes must match the 8-pin CDIP package and hermetic seal specification. Verify that alternative parts meet the same 1500% CTR and 1500 Vrms isolation ratings. Ensure the replacement supports the -55°C to +125°C operating range. Cross-reference pinouts to guarantee compatibility with existing PCB layouts.