EL2531

Overview

The EL2531 is a dual-channel high-speed transistor output optocoupler manufactured by Everlight Electronics. It integrates an infrared emitting diode with a high-speed photo detector transistor in an 8-pin DIP package. The device supports a data rate of 1 Mb/s and provides an isolation voltage of 5000 Vrms. Key electrical parameters include a collector-emitter saturation voltage of 0.4V at 10mA, a propagation delay of 1µs, and a current transfer ratio (CTR) of 19-50% at 16mA forward current. It operates within a temperature range of -40°C to 100°C.

Feature Summary

• Dual-channel configuration for independent signal isolation
• High-speed operation supporting 1 Mb/s data rates
• Robust insulation capability with 5000 Vrms isolation voltage
• Wide operating temperature range suitable for industrial environments

Applications

• Industrial automation control systems
• Data communication interfaces requiring galvanic isolation
• Power supply feedback circuits
• Microcontroller input/output isolation

Procurement Notes

Verify the specific ordering suffix to ensure the correct packaging format, such as bulk or tape and reel, matches your assembly requirements. Confirm that the component meets relevant safety certifications like UL, VDE, or CQC if required for your final product's regulatory compliance. Check for RoHS compliance status based on the manufacturing date code.

Selection Notes

Select this component when dual-channel isolation is necessary within a single package footprint. Ensure the required data rate does not exceed 1 Mb/s. Verify that the input current can be maintained at 16mA to achieve the specified current transfer ratio. Consider the 8-pin DIP package constraints for PCB layout and thermal management in dense assemblies.

Part Context

The EL2531 belongs to Everlight's high-speed photocoupler family, designed for applications demanding fast signal transmission between isolated circuits. It serves as a cost-effective alternative to faster logic-output couplers where moderate speed is sufficient. The dual-channel design reduces board space compared to using two single-channel devices.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Consult manufacturer cross-reference guides for potential equivalents from other suppliers.