CYUSB4347-BZXC

Application Specific Microcontrollers Overview

The CYUSB4347-BZXC is a USB 3.1 Gen 2 Type-C hub with integrated Power Delivery (PD) controller, part of the HX3PD family. It features seven downstream ports: five supporting SuperSpeed (10 Gbps) and two limited to High-Speed (480 Mbps). The device integrates two USB-PD controllers compliant with PD 3.0, enabling dynamic power profile configuration for both upstream and one downstream port. It includes an Arm Cortex-M0 CPU subsystem, Dock Management Controller (DMC), and a crypto block for firmware authentication. The component operates within a 192-ball BGA package measuring 12 mm × 12 mm.

Application Specific Microcontrollers Feature Summary

• USB-IF Certified USB 3.1 Gen 2 Hub Silicon with seven downstream ports
• Integrated dual USB-PD controllers supporting PD 3.0 specification
• Dock Management Controller (DMC) with signed/unsigned firmware update support
• Crypto block providing hardware acceleration for AES, SHA, and CRC

Application Specific Microcontrollers Applications

• USB-C docking stations for notebook PCs
• Monitor docks with display output capabilities
• Thunderbolt docks requiring integrated hub and PD management

Application Specific Microcontrollers Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to ensure correct package and temperature grade. Confirm that the required firmware image matches the CYUSB4347 variant, as it lacks the signed firmware download capability present in the CYUSB4357 model. Ensure design compliance with the 192-ball BGA thermal and electrical guidelines provided in application notes.

Application Specific Microcontrollers Selection Notes

Select this model when a dock requires seven downstream ports with five capable of 10 Gbps speeds and integrated PD 3.0 control on the upstream and one downstream port. Choose CYUSB4347 over CYUSB4357 if signed firmware updates via DMC are not required. Ensure the system design accommodates the 192-ball BGA footprint and supports the necessary SPI flash interface for boot-up configuration.

Application Specific Microcontrollers Part Context

The CYUSB4347 belongs to the HX3PD product family, which consolidates multiple discrete components—typically two 4-port USB hubs, two USB-PD controllers, and a dock management controller—into a single chip. This integration significantly reduces bill-of-materials complexity for docking station designs compared to previous multi-chip solutions.

Application Specific Microcontrollers Replacement Considerations

The CYUSB4357 is a compatible alternative within the same family offering identical hub and PD functionality but adds support for signed firmware downloads via the Dock Management Controller. Verify if the security requirement for signed firmware updates dictates the choice between these two variants.