HCPL0534

Transistor, Photovoltaic Output Optoisolators Overview

The HCPL0534 is a dual-channel high-speed transistor optocoupler from the HCPL05XX series, manufactured by Fairchild Semiconductor. It integrates an AlGaAs LED optically coupled to a high-speed photodetector transistor in a compact 8-pin SOIC package. The device features a separate bias connection for the photodiode, significantly reducing base-collector capacitance to achieve speeds several orders of magnitude faster than conventional phototransistor optocouplers. Key electrical parameters include a data rate of 1 Mbit/s and a minimum common mode transient immunity of 15 kV/µs at VCM = 1500V. It offers an open collector output and is guaranteed to operate within a temperature range of 0°C to 70°C.

Transistor, Photovoltaic Output Optoisolators Feature Summary

• High-speed performance with a data rate of 1 Mbit/s
• Enhanced speed via separate photodiode bias connection reducing base-collector capacitance
• High common mode transient immunity of 15 kV/µs at 1500V
• Dual-channel configuration in an 8-pin SOIC package

Transistor, Photovoltaic Output Optoisolators Applications

• Line receivers
• Pulse transformer replacement
• Output interface to CMOS-LSTTL-TTL
• Wide bandwidth analog coupling

Transistor, Photovoltaic Output Optoisolators Procurement Notes

Verify the manufacturer origin carefully, as the HCPL0534 part number has been produced by multiple entities including Fairchild Semiconductor, Broadcom, and onsemi. Ensure the specific datasheet matches the required operating temperature range (0°C to 70°C) and isolation ratings. Confirm package type is SOIC-8 and check for specific ordering suffixes if higher temperature or automotive grades are needed, as standard versions may not meet those criteria.

Transistor, Photovoltaic Output Optoisolators Selection Notes

Select this component when high-speed digital isolation is required between TTL, LSTTL, or CMOS logic circuits. The dual-channel design optimizes mounting density for applications needing two isolated signal paths. It is suitable for replacing pulse transformers where size and speed are critical. Ensure the input current does not exceed maximum ratings and that the open-collector output can handle the load voltage and current requirements of the destination circuit.

Transistor, Photovoltaic Output Optoisolators Part Context

The HCPL0534 belongs to the HCPL05XX family of high-speed transistor optocouplers. This series is designed for applications requiring fast signal transmission across isolation barriers. Unlike single-channel variants like the HCPL04XX, the HCPL05XX devices provide two channels per package, offering better board space efficiency. The technology utilizes an AlGaAs LED and a specialized photodetector structure to minimize propagation delay and maximize data integrity.

Transistor, Photovoltaic Output Optoisolators Replacement Considerations

HCPL-0534-000E

Transistor, Photovoltaic Output Optoisolators FAQ

How does the HCPL0534 achieve higher speed compared to standard optocouplers?

It uses a separate connection for the bias of the photodiode, which reduces the base-collector capacitance of the input transistor, improving speed by several orders of magnitude.

What is the common mode transient immunity rating?

The device guarantees a minimum common mode transient immunity of 15 kV/µs at a common mode voltage (VCM) of 1500V.