HCPL-0738

Logic Output Optoisolators Overview

The HCPL-0738 is a dual-channel high-speed CMOS optocoupler housed in an SOIC-8 package. It supports a data rate of 15 MBd with a typical propagation delay of 20 ns and pulse width distortion of 15 ns. The device features open collector outputs capable of sourcing 2 mA, operating within a supply voltage range of 4.5 V to 5.5 V. It provides an isolation voltage of 3750 Vrms and a common mode rejection ratio of at least 10 kV/µs. The component operates across a temperature range of -40°C to +100°C.

Logic Output Optoisolators Feature Summary

• Integrates high-speed LEDs with CMOS detector chips containing photodiodes, transimpedance amplifiers, and voltage comparators for robust signal transmission.
• Provides electrical isolation with a minimum common mode transient immunity of 10 kV/µs to ensure signal integrity in noisy environments.
• Compatible with standard +5V CMOS logic levels, facilitating direct interface with microprocessor systems and digital logic circuits.

Logic Output Optoisolators Applications

• Isolation for digital fieldbus networks such as DeviceNet, SDS, and PROFIBUS.
• Interface isolation for plasma display panels (PDP).
• Multiplexed data transmission systems requiring high-speed signal transfer.
• Microprocessor system interfaces and computer peripheral connections.
• DC/DC converter control circuitry requiring galvanic isolation.

Logic Output Optoisolators Procurement Notes

Verify the specific suffix code (e.g., -000E, -060E) to confirm RoHS compliance and packaging type, as variants exist. Note that certain suffixes indicate tube packaging while others may denote tape and reel options. Confirm current availability status, as some variants are marked as obsolete or end-of-life by the manufacturer. Ensure the selected part number matches the required safety certifications, such as UL1577 or VDE 0884, for the intended application environment.

Logic Output Optoisolators Selection Notes

Select this component when dual-channel isolation with 15 MBd speed is required in a compact surface-mount footprint. The open-collector output design necessitates external pull-up resistors; verify resistor values align with the target logic family voltage levels. Consider the 40 ns maximum propagation delay skew if precise timing alignment between channels is critical. Ensure the operating temperature range meets the environmental demands of the final assembly.

Logic Output Optoisolators Part Context

The HCPL-0738 belongs to the HCPL-07xx series of high-speed CMOS optocouplers manufactured by Broadcom Limited. This series utilizes advanced CMOS IC technology to achieve high performance with low power consumption. The device is part of a broader family of logic output optoisolators designed for demanding industrial and commercial applications requiring reliable electrical separation between circuits.

Logic Output Optoisolators Replacement Considerations

Direct replacements include other dual-channel 15 MBd CMOS optocouplers in SOIC-8 packages from compatible manufacturers. Verify pinout compatibility and electrical parameters such as CMTI and propagation delay before substitution. Check for updated RoHS compliance status if replacing older inventory.