HCPL0661

Logic Output Optoisolators Overview

The HCPL-0661 is a high-speed, dual-channel optocoupler manufactured by Broadcom Limited (formerly Avago/Agilent), not onsemi. It integrates a GaAsP infrared LED with an integrated high-gain photo-detector IC to provide TTL-compatible logic output. Key electrical parameters include a data rate of 10 Mb/s, isolation voltage of 3750 Vrms, and typical propagation delays of 24 ns rise and 10 ns fall times. The device operates within a temperature range of -40°C to +85°C and supports a maximum forward current of 20 mA.

Logic Output Optoisolators Feature Summary

• Provides high common-mode rejection ratio (CMR) for noise immunity in digital signal transmission.
• Features TTL-compatible logic output for direct interfacing with standard logic families.
• Integrates a high-gain photo-detector for improved speed and sensitivity compared to discrete phototransistor designs.

Logic Output Optoisolators Applications

• High-speed digital communication interfaces requiring galvanic isolation.
• Isolation of microprocessor buses and control signals in industrial automation.
• Signal transmission between different ground potential domains in power electronics.

Logic Output Optoisolators Procurement Notes

Verify the manufacturer designation carefully, as the HCPL-0661 is a Broadcom product. Confirm that the specific suffix (e.g., 000E) matches the required RoHS compliance and packaging type. Ensure the procurement source provides valid datasheets from Broadcom or authorized distributors to avoid counterfeit components.

Logic Output Optoisolators Selection Notes

Select this component when high-speed digital isolation is required with TTL compatibility. It is suitable for applications needing faster response times than standard phototransistor optocouplers. Consider the PDIP-8 or SOIC-8 package options based on board space and mounting requirements.

Logic Output Optoisolators Part Context

This part belongs to the HCPL series of high-speed optocouplers originally developed by Agilent Technologies and later transferred to Avago and Broadcom. The series is designed for robust digital isolation in noisy environments, offering superior performance over basic transistor-output optocouplers due to the integrated detector circuitry.

Logic Output Optoisolators Replacement Considerations

Direct replacements may include other HCPL-0661 variants from Broadcom with different suffixes indicating package or compliance changes. Cross-brand equivalents should be verified for matching pinout, propagation delay, and isolation voltage specifications.