HCPL-0661

Logic Output Optoisolators Overview

The HCPL-0661 is a high-speed, dual-channel logic output optocoupler manufactured by Broadcom Limited. It integrates an AlGaAs or GaAsP LED with a high-gain integrated photodetector and Schottky-clamped open-collector outputs. The device supports data rates up to 10 MBd and provides an isolation voltage of 3750 Vrms. Key electrical parameters include a typical rise time of 24 ns, fall time of 10 ns, and maximum propagation delay of 100 ns. It operates within a supply voltage range of 4.5V to 5.5V, handles a maximum forward current of 15 mA, and delivers up to 50 mA output current per channel.

Logic Output Optoisolators Feature Summary

• High common-mode transient immunity (CMTI) of 15 kV/µs due to internal shielding
• Schottky-clamped open-collector outputs enabling wired-OR functionality
• TTL-compatible logic interface for direct integration with digital systems

Logic Output Optoisolators Applications

• Computer peripheral interfaces requiring signal isolation
• Data isolation and conversion in communication circuits
• Switching power supply control loops
• Ground loop elimination in industrial instrumentation

Logic Output Optoisolators Procurement Notes

Verify the specific suffix (e.g., -000E vs -500E) against the required packaging format, as standard tubes differ from tape-and-reel options. Confirm RoHS compliance status and lead times directly with authorized distributors. Ensure the selected variant matches the necessary insulation voltage and CMTI ratings for the target application safety standards.

Logic Output Optoisolators Selection Notes

Select this component when high-speed digital isolation is required alongside robust noise immunity. The 10 MBd data rate and 15 kV/µs CMTI make it suitable for noisy environments. Consider the SOIC-8 package dimensions and thermal dissipation limits (60 mW) during PCB layout. Verify that the input current requirements align with the driving logic levels.

Logic Output Optoisolators Part Context

This device belongs to the HCPL-06XX series of high-speed logic gate optocouplers originally designed by Fairchild Semiconductor. Following Avago Technologies' acquisition of Fairchild's semiconductor business, the product line was transferred to Avago, which later rebranded as Broadcom Limited. The series includes variants like HCPL-0600, HCPL-0611, and HCPL-0630, sharing similar architectural features but differing in channel counts and specific electrical characteristics.

Logic Output Optoisolators Replacement Considerations

HCPL-0661-500E: Identical functional specifications with alternative packaging options such as tape and reel.

Logic Output Optoisolators FAQ

What is the maximum common-mode transient immunity (CMTI) rating?

The HCPL-0661 offers a minimum CMTI of 15 kV/µs, ensuring reliable operation in high-noise environments.

Can multiple outputs be connected together?

Yes, the Schottky-clamped open-collector output structure supports wired-OR logic configurations.