HCPL-3700-520

Transistor, Photovoltaic Output Optoisolators Overview

The HCPL-3700-520 is a logic output optocoupler from the Broadcom HCPL series, designed for AC/DC to logic signal isolation. It features an open collector output and supports through-hole installation in a DIP-8 package. Key electrical parameters include a maximum continuous output current of 30 mA, a forward current of 50 mA, and a forward voltage of 740 mV. The device provides an insulation voltage of 3750 Vrms with a power dissipation of 305 mW. Operating temperatures range from -40°C to +85°C, with typical rise and fall times of 20 μs and 300 ns respectively.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Provides galvanic isolation between AC/DC input circuits and logic outputs
• Features an open collector output configuration for direct logic interfacing
• Supports high-voltage isolation up to 3750 Vrms for safety compliance

Transistor, Photovoltaic Output Optoisolators Applications

• AC/DC to Logic signal conversion
• Voltage threshold detection
• Current threshold detection
• Industrial control systems requiring galvanic isolation

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the specific suffix (e.g., -520) against official Broadcom documentation to confirm pinout and packaging details, as suffixes may indicate variations in tape-and-reel quantity or lead finish. Ensure the procurement source provides valid UL, CSA, and VDE certification marks corresponding to the specific part number variant. Cross-reference the datasheet revision date to ensure compatibility with current design requirements.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high-speed threshold detection is required alongside robust isolation. The open collector output necessitates external pull-up resistors for proper logic level generation. Consider the 20 μs rise time limitation for applications involving low-frequency signals rather than high-speed digital data transmission. Verify that the 30 mA output current capability meets the load requirements of the downstream logic circuitry.

Transistor, Photovoltaic Output Optoisolators Part Context

The HCPL-3700-520 belongs to the HCPL family of voltage and current threshold detection optocouplers. It shares functional similarities with the HCPL-0370 and HCPL-3760, though the HCPL-3760 is noted as a low-current version. This specific model is engineered for industrial applications where reliable isolation and clear threshold switching are critical for system safety and control.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Official substitutes within the same family include the HCPL-0370 and HCPL-3760. Verify if the HCPL-3760's lower current rating is acceptable for the application. Ensure any replacement maintains the DIP-8 package and open collector output type for direct pin compatibility.