HCPL-4701#520

Transistor, Photovoltaic Output Optoisolators Overview

The HCPL-4701#520 is a single-channel high-speed optocoupler featuring a photodarlington output with base connection. It offers a data rate of 100 kb/s and a typical current transfer ratio (CTR) of 3500%. The device operates with a forward voltage of 1.2 V and supports an output current of 60 mA. Insulation voltage ratings include 3750 Vrms for standard versions and 5000 Vrms for specific suffixes. It functions within a temperature range of -40°C to +85°C, consuming less than 1 mW power.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• Ultra-low input drive current capability down to 40 µA enables operation in battery-powered applications.
• High gain photodarlington output provides significant current amplification for logic interfacing.
• Integrated AlGaAs LED and detector ensure fast switching speeds suitable for digital isolation.
• Compact SOIC-8 surface mount package reduces PCB footprint compared to traditional DIP formats.

Transistor, Photovoltaic Output Optoisolators Applications

• Ground isolation for TTL, LSTTL, and CMOS logic families
• ISDN telephone interface circuits
• EIA RS-232C line receiver isolation
• Battery-powered low-power electronic systems

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the exact suffix against the manufacturer's latest lifecycle status, as many HCPL-4701 variants are discontinued or end-of-life. Confirm insulation voltage requirements (3750 Vrms vs 5000 Vrms) match the specific part number suffix. Ensure the SOIC-8 package type aligns with the design-in footprint. Cross-reference safety certifications such as UL 1577 and IEC standards for final application compliance.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when low input current is critical for power efficiency in isolated digital interfaces. The high CTR allows driving standard logic loads directly without additional amplification. Choose based on required insulation voltage and package style. Verify that the 100 kb/s data rate meets the system's signal timing requirements. Consider thermal dissipation limits if operating near maximum junction temperatures.

Transistor, Photovoltaic Output Optoisolators Part Context

The HCPL-4701 belongs to Broadcom's HCPL series of high-speed optocouplers. It is designed to replace older discrete isolation solutions by integrating LED and detector on a single chip. The device is pin-compatible with certain legacy isolators but offers superior speed and lower power consumption. It serves as a bridge between microcontroller domains and noisy industrial environments.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers include HCPL-4701-000E and HCPL-4701-560E. Check datasheets for pin compatibility and electrical parameter equivalence before substitution.