HCPL2503

Transistor, Photovoltaic Output Optoisolators Overview

The HCPL2503 is a single-channel, high-speed transistor output optocoupler manufactured by onsemi. It consists of an AlGaAs LED optically coupled to a high-speed phototransistor with base drive capability. The device supports data rates up to 250 kb/s in NRZ mode and offers high common-mode transient immunity exceeding 1000 V/µs. It features a 3750 Vdc withstand test voltage and is compatible with LSTTL logic families. The component is housed in an 8-pin DIP package.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• High-speed operation with data rates up to 250 kb/s
• LSTTL logic compatibility for direct interface
• High common-mode transient immunity exceeding 1000 V/µs
• Integrated base drive for the output phototransistor

Transistor, Photovoltaic Output Optoisolators Applications

• High-speed logic interface circuits
• Data communication systems requiring galvanic isolation
• Industrial control systems with noisy environments
• Power supply feedback loops

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific manufacturer marking, as Fairchild Semiconductor was acquired by onsemi. Confirm the package type is 8-pin DIP. Check for obsolete status or last-time buy notices from distributors. Ensure the datasheet version matches the production batch specifications for electrical parameters.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high-speed digital isolation is required between LSTTL-compatible logic levels. The integrated base drive allows for faster switching speeds compared to standard phototransistor outputs. Verify that the input current requirements align with the driving circuit capabilities and that the isolation voltage meets system safety standards.

Transistor, Photovoltaic Output Optoisolators Part Context

The HCPL2503 belongs to the family of high-speed transistor output optocouplers, sharing architectural similarities with parts like the 6N135 and HCPL4502. These devices utilize an AlGaAs LED coupled to a phototransistor to provide signal transmission across isolated barriers while maintaining high bandwidth and noise immunity.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Compatible substitutes include the 6N135, HCPL4502, and HCPL2530. Verify pinout compatibility and electrical parameter equivalence before substitution. Note that some variants may differ in channel count or specific timing characteristics.