PC818Y

Overview

The Sharp PC818Y is a discontinued single-channel optoisolator featuring a transistor output. It provides an isolation voltage of 5000Vrms and operates within a temperature range of -30°C to 100°C. The device utilizes a 4-DIP package with a pitch of 7.62mm. Key electrical parameters include a maximum collector-emitter voltage of 35V, a forward current of 50mA, and a typical forward voltage of 1.2V. The collector-emitter saturation voltage is limited to 400mV, with a rise time of 7µs and a fall time of 6µs. The current transfer ratio ranges from 10% to 100% at a forward current of 1mA.

Feature Summary

• Provides high-voltage electrical isolation between input and output circuits using infrared LED technology.
• Features a phototransistor output stage suitable for digital signal transmission and switching applications.
• Designed for through-hole mounting in standard DIP packages for reliable PCB integration.

Applications

• Industrial control systems requiring galvanic isolation
• Power supply feedback loops
• Signal interfacing between microcontrollers and high-voltage circuits

Procurement Notes

Verify component authenticity due to the part's end-of-life status. Check datasheets for RoHS compliance discrepancies across manufacturing batches. Confirm pinout compatibility with existing footprints before procurement. Source only from authorized distributors to avoid counterfeit components. Validate replacement options if new production units are unavailable.

Selection Notes

Select this component for applications requiring robust isolation with moderate speed requirements. Consider the 5000Vrms rating for safety-critical designs. Evaluate the current transfer ratio specifications against load requirements. Ensure the operating temperature range aligns with environmental conditions. Compare alternative transistor-output optocouplers if lead times are critical.

Part Context

The PC818Y belongs to Sharp's PC817/PC818 series of general-purpose optocouplers. This family is widely recognized for its reliability in industrial and consumer electronics. The specific model offers a balance of performance and cost-effectiveness for basic isolation tasks. It serves as a foundational component for circuit protection and signal coupling.

Replacement Considerations

The HCPL-817-000E by Broadcom Limited is documented as a similar substitute. Verify pinout and electrical parameter compatibility before substitution. Ensure the replacement meets the same isolation voltage and package requirements.

FAQ

Is the PC818Y compliant with RoHS standards?

Documentation indicates that the PC818Y may not be fully RoHS compliant. Verify specific batch certifications with the manufacturer or distributor.

What is the maximum isolation voltage of the PC818Y?

The PC818Y supports an isolation voltage of 5000Vrms between the input LED and output transistor.