PC825Y

Overview

The Sharp Microelectronics PC825Y is a dual-channel optoisolator featuring Darlington transistor outputs housed in an 8-DIP package. It provides 5000Vrms isolation voltage between input and output circuits. The device supports a maximum DC forward current of 50 mA with a typical forward voltage of 1.2V. Output characteristics include a collector-emitter voltage of 35V, a saturation voltage of 1V maximum, and a channel current capacity of 80mA. The minimum current transfer ratio is 600% at 1mA input. Operating temperature ranges from -30°C to 100°C, with rise and fall times of 60µs and 53µs respectively.

Feature Summary

• Dual-channel configuration for compact circuit design
• High sensitivity Darlington output stage
• Robust 5000Vrms electrical isolation barrier

Applications

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

Procurement Notes

Verify component authenticity as the PC825Y is officially obsolete and no longer manufactured by Sharp Microelectronics. Sourcing requires careful validation of supplier credentials to ensure genuine parts or qualified direct replacements like the LTV-825. Confirm RoHS compliance status, as original units may not meet current environmental regulations. Request detailed datasheets and test reports to verify performance parameters before integration into production designs.

Selection Notes

Select this component only if legacy compatibility is required or if specific historical design constraints mandate its use. Evaluate alternative modern optocouplers that offer equivalent isolation ratings and pin configurations while meeting current regulatory standards. Consider the availability of direct substitutes such as the LTV-825 for improved supply chain stability. Ensure the Darlington output characteristics align with the load requirements of the target application circuit.

Part Context

The PC825Y belongs to the Sharp PC825 series of high-sensitivity photocouplers designed for dense mounting applications. It utilizes a Darlington transistor output structure to achieve high current transfer ratios. The component was widely used in industrial and consumer electronics before being phased out. Its 8-DIP packaging facilitated through-hole mounting on printed circuit boards.

Replacement Considerations

The LTV-825 by Lite-On is documented as a direct substitute. Verify pinout compatibility and electrical parameter equivalence before substitution.