HCPL-7721-320

Logic Output Optoisolators Overview

The HCPL-7721-320 is a high-speed logic output optoisolator manufactured by Broadcom Limited. It features a single channel with a data rate of 25 Mb/s and a propagation delay of up to 40 ns. The device provides an isolation voltage of 5000 Vrms, ensuring robust galvanic isolation. Key electrical parameters include a forward current of 10 mA, forward voltage of 5 V, and output current of 10 mA. Rise and fall times are typically 9 ns and 8 ns, respectively. The component operates within a temperature range of -40°C to +85°C and has a power dissipation of 150 mW. It utilizes a PDIP-8 Gull Wing package for through-hole mounting.

Logic Output Optoisolators Feature Summary

• High-speed CMOS technology enables low power consumption while maintaining performance compatible with standard CMOS logic levels.
• Integrated push-pull output driver provides strong signal integrity and fast switching characteristics for digital applications.
• Robust insulation structure supports high common-mode rejection ratios, ensuring reliable operation in noisy industrial environments.

Logic Output Optoisolators Applications

• Digital fieldbus isolation for protocols such as CC-Link, DeviceNet, and PROFIBUS
• Microprocessor interface and data transmission systems
• AC plasma display panel level shifting

Logic Output Optoisolators Procurement Notes

This component is officially listed as obsolete or discontinued by the manufacturer. Availability is restricted, and sourcing may require checking secondary market distributors or verifying end-of-life status directly with authorized suppliers. Designers should consider alternative replacement parts for new production runs due to limited supply chain support.

Logic Output Optoisolators Selection Notes

Select this part when high-speed digital isolation is required with specific voltage ratings. Verify that the 5000 Vrms isolation rating meets system safety requirements compared to lower-rated variants like the HCPL-7721-020. Ensure the through-hole PDIP-8 package fits the PCB layout constraints. Confirm compatibility with 5V CMOS logic inputs and outputs before integration into the circuit design.

Logic Output Optoisolators Part Context

The HCPL-7721 series represents a family of high-speed optocouplers designed for demanding industrial communication interfaces. The HCPL-7721-320 variant specifically offers enhanced isolation voltage compared to standard models. It belongs to Broadcom's legacy portfolio of logic output optoisolators, previously marketed under Avago Technologies, focusing on reliability and speed for bus isolation tasks.

Logic Output Optoisolators Replacement Considerations

Public confirmed substitute part numbers include HCPL-7721-020 for lower isolation requirements and HCPL-7721-520 for similar specifications. Cross-reference datasheets to verify pinout compatibility and electrical parameter alignment before substitution.

Logic Output Optoisolators FAQ

What is the maximum data rate supported by the HCPL-7721-320?

The device supports a maximum data rate of 25 Mb/s.

Does the HCPL-7721-320 have a push-pull output?

Yes, it features a push-pull (totem pole) output configuration.