PC825

Overview

The Sharp PC825 is a dual-channel optoisolator featuring Darlington transistor outputs, designed for high-density mounting applications. It provides an isolation voltage of 5000Vrms and supports a maximum output voltage of 35V per channel. The device operates with a DC input type and offers a typical forward voltage of 1.2V. Key electrical parameters include a maximum DC forward current of 50 mA, a minimum current transfer ratio of 600% at 1mA input, and a collector-emitter saturation voltage of up to 1V. Each channel can handle an output current of 80mA, with typical rise and fall times of 60µs and 53µs respectively. It is housed in an 8-DIP package suitable for through-hole installation.

Feature Summary

• Dual-channel configuration within a single compact package for space-efficient circuit design
• High sensitivity Darlington transistor output stage enabling efficient signal transmission
• Robust 5000Vrms insulation capability for reliable galvanic isolation between circuits

Applications

• Industrial control systems requiring isolated signal interfaces
• Power supply feedback loops for voltage regulation
• Microcontroller interface circuits needing level shifting and isolation

Procurement Notes

Verify component authenticity as the PC825 is discontinued by Sharp Microelectronics. Confirm RoHS compliance status, as original versions may not meet current environmental standards. Ensure replacement parts match pinout and electrical specifications if sourcing from third-party distributors or alternative manufacturers like LITEON.

Selection Notes

Select this component when high gain and fast switching are required in a dual-channel setup. The Darlington output provides significant current amplification, making it suitable for driving loads directly. Consider the 8-DIP package constraints and thermal management requirements within the operating temperature range of -30°C to 100°C during system integration.

Part Context

The PC825 belongs to Sharp's PC815 series of photocouplers, which are known for high sensitivity and density. This series is widely used in communication equipment and industrial automation. The PC825 specifically integrates two independent channels, offering a cost-effective solution compared to using two separate single-channel isolators.

Replacement Considerations

The LTV-825 from LITEON is documented as a direct substitute. Verify pin compatibility and electrical parameter alignment before implementation.