CYUSB3328-88LTXCT

Application Specific Microcontrollers Overview

The CYUSB3328-88LTXCT is an EZ-USB HX3 USB 3.2 Gen 1 hub controller compliant with USB 3.0 specification revision 1.0. It supports up to eight downstream ports, comprising four SuperSpeed (SS) and four USB 2.0 ports, enabling simultaneous connections for embedded SS devices and removable USB 2.0 devices via the shared link feature. The device integrates an ARM Cortex-M0 CPU with 16 KB RAM and 32 KB ROM for configuration and control. It supports USB 5 Gbps data rates on all ports, backward compatibility with High-Speed, Full-Speed, and Low-Speed modes, and includes dedicated transaction translators. Key features include ghost charging, ACA-Dock support, and pin-strap configuration options.

Application Specific Microcontrollers Feature Summary

• Supports up to eight downstream ports: four SuperSpeed and four USB 2.0 ports using the shared link feature.
• Integrates an ARM Cortex-M0 CPU with 16 KB RAM and 32 KB ROM for system configuration and firmware execution.
• Enables ghost charging to power connected devices when the upstream host is disconnected.
• Complies with USB Battery Charging v1.2 specification, supporting Apple charging and ACA-Dock functionality.

Application Specific Microcontrollers Applications

• Standalone hubs
• PC and tablet motherboards
• Docking stations
• Hand-held cradles

Application Specific Microcontrollers Procurement Notes

Verify the specific ordering suffix '88LTXCT' against the manufacturer's official ordering guide to confirm package type, temperature range, and tape-and-reel specifications. Ensure that the selected variant matches the required industrial or commercial temperature rating and packaging format for the intended production volume.

Application Specific Microcontrollers Selection Notes

Select this component when a design requires more than four physical USB ports from a single hub controller by utilizing the shared link capability. Confirm that the application benefits from the integrated ARM Cortex-M0 for local processing tasks such as battery charging management or vendor-specific command handling without requiring an external microcontroller.

Application Specific Microcontrollers Part Context

This part belongs to the Infineon EZ-USB HX3 family of USB 3.2 Gen 1 hub controllers. The CYUSB3328 variant is distinct within the family for offering eight total downstream ports (4 SS + 4 USB 2.0) through its shared link architecture, whereas other models like the CYUSB3324 offer only four SuperSpeed ports.

Application Specific Microcontrollers Replacement Considerations

Direct replacements within the same package and pinout are limited to other CYUSB332x variants with compatible port counts and features, such as the CYUSB3326, provided the shared link requirements match. Cross-family replacements require significant schematic and firmware redesign due to differences in port count and CPU integration.