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Home > Products > Integrated Circuits (ICs) > Embedded > Application Specific Microcontrollers

Infineon Technologies CYUSB4357-BZXC

Name: CYUSB4357-BZXC
Brand: Infineon Technologies
SKU: CYUSB4357-BZXC
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CYUSB4357-BZXC

Manufacturer:: Infineon Technologies

Category:: Application Specific Microcontrollers

Package:: 192-LFBGA

Datasheet:: CYUSB4357-BZXC.pdf

Description:: USB Super Speed Hubs

Quantity:: RFQ Add To RFQ list

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Inventory:1,618

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Product details

Overview

CYUSB4357-BZXC from Infineon Technologies (formerly Cypress) is a USB 3.1 Gen 2 Type-C hub with integrated Power Delivery 3.0 controllers, Arm® Cortex®-M0 CPU subsystem, Dock Management Controller, and hardware crypto block. It delivers 10 Gbps SuperSpeed+ on five downstream ports, supports DRP/DFP PD roles on upstream and one downstream port, and enables Ghost Charge™ for charging without upstream connection - deployed in multi-port docking stations for notebook PCs.

For engineers reviewing the CYUSB4357-BZXC datasheet, CYUSB4357-BZXC pinout, CYUSB4357-BZXC application, or CYUSB4357-BZXC equivalent, key selection criteria include its 7-port topology (5× SS Gen 2 + 2× HS), signed firmware update capability via DMC, integrated Type-C transceivers with RP/RD termination, and 192-ball BGA package with 0.8-mm pitch.

Technical Context

The CYUSB4357-BZXC integrates two independent hub controllers: a USB 3.1 Gen 2 (10 Gbps) controller supporting PTM, U0–U3 link power states, and store-and-forward packet routing; and a USB 2.0 hub controller with seven transaction translators (Multi-TT), L0–L3 power management, and full suspend/resume/wake signaling.

Its dual USB-PD 3.0 controllers implement BMC/4b5b encoding over CC lines, programmable current-source RP (for DFP role) and RD (for UFP role), dead-battery termination detection, and chunked Extended Message handling for backward compatibility with PD 2.0 systems - all managed by a dedicated Cortex-M0 MCU with SWD debug interface and Wakeup Interrupt Controller.

Key Specifications

Parameter	Value and Actual Design Meaning
USB Data Rate	10 Gbps (SS Gen 2) on 5 DS ports; 480 Mbps (HS) on 2 DS ports
PD Compliance	USB PD 3.0 with Extended Messages up to 260 bytes and chunking for PD 2.0 interoperability
Port Count	1 US port + 7 DS ports; configurable as 3× Type-C + 4× Type-A or 7× Type-A
Firmware Security	Signed firmware updates using RSA-2048/SHA-256; hardware AES/SHA/CRC acceleration
Power Management	Ghost Charge™ enables VBUS delivery to DS ports without US connection
Package	192-ball BGA, 12 mm × 12 mm, 0.8-mm ball pitch, RoHS-compliant
Interface Support	I²C (3 channels), SPI (2 channels), SWD debug, GPIOs, ADC/DAC, and USB 2.0 device controller for Billboard

Pinout & Package

Package: 192-ball BGA (12 mm × 12 mm, 0.8-mm pitch), thermally enhanced for dock applications requiring sustained 10 Gbps throughput and PD negotiation.

Pin/Terminal	Circuit Role	Design Meaning
CC1_P0 / CC2_P0	Type-C Configuration Channel	Dual CC inputs for plug orientation detection, role negotiation (DRP/DFP/UFP), and BMC communication per PD 3.0
TXP1_P1 / TXN1_P1	USB 3.1 Gen 2 Differential Pair	Primary upstream SuperSpeed transmit lane (10 Gbps) with embedded clock recovery
RXP_P4 / RXN_P4	USB 3.1 Gen 2 Differential Pair	Downstream Port 4 receive lane supporting SS Gen 2, SS Gen 1, and USB 2.0 fallback
VCONN_MON_P0 / VCONN_MON_P1	VCONN Monitoring	Enables active cable detection and VCONN power control for e-marked cables
I2C_SDA1 / I2C_SCL1	Dock Management I²C Bus	Primary I²C interface for host EC to configure DMC, enable/disable ports, and trigger firmware updates
SPI_MISO_DMC / SPI_SS_DMC	Firmware Flash Interface	Direct connection to external SPI flash for boot-time firmware loading and runtime DMC firmware updates

Key Features

Feature	Design Value
Integrated Dock Management Controller (DMC)	Full-speed USB 2.0 device controller enabling Billboard class compliance and vendor-specific messaging over USB
Signed Firmware Updates	RSA-2048/SHA-256 verified firmware images stored and applied via DMC, preventing unauthorized code execution
Ghost Charge™	Delivers 5 V/3 A to downstream Type-C ports even when upstream port is unconnected or powered off
Hardware Crypto Block	AES-128/256, SHA-256, CRC-32, and PRNG acceleration for secure boot and firmware authentication
Programmable RP Current Source	Configurable VBUS current sourcing (1.5 A/3.0 A/5.0 A) per USB Type-C spec, eliminating external current-setting resistors

Applications

USB-C Docking Station

Thunderbolt-Compatible Dock

Use Scenario: Multi-peripheral expansion for business laptops via single USB-C cable, delivering video (DP Alt Mode), Ethernet, audio, and storage.

IC Role / Device Role / Timing Role: Central hub controller managing USB 3.1 Gen 2 data routing, PD policy enforcement, and dock-level firmware orchestration.

Use Value: Replaces five discrete ICs (2× USB hubs, 2× PD controllers, DMC) - reducing BOM count, PCB area, and validation effort.

Use Scenario: High-end Thunderbolt 3 dock integrating USB-C PD, DP Alt Mode, and Gigabit Ethernet while maintaining backward compatibility with USB 2.0 peripherals.

IC Role / Device Role / Timing Role: USB protocol bridge and PD arbiter coordinating with Thunderbolt controller over I²C to manage shared VBUS and port enablement.

Use Value: Enables simultaneous DP tunneling and USB 3.1 Gen 2 data transfer without bandwidth contention via dedicated SS lanes and independent USB 2.0 TTs.

Monitor with USB Hub

Enterprise Charging Dock

Use Scenario: Smart monitor with built-in USB-C upstream input and multiple downstream ports for keyboard/mouse/storage peripherals.

IC Role / Device Role / Timing Role: Type-C port controller and USB hub managing display data path isolation, USB enumeration, and billboard descriptor reporting.

Use Value: Supports USB Billboard Class for real-time error reporting (e.g., "Dock not connected" or "Firmware update required") via HID interface.

Use Scenario: Shared desk charger in office environments delivering up to 100 W PD to laptops while powering USB peripherals.

IC Role / Device Role / Timing Role: Dual-role PD controller enforcing power contracts, monitoring OCP/OVP, and enabling Ghost Charge™ for peripheral-only operation.

Use Value: Maintains 5 V/3 A output to downstream devices during laptop sleep or battery depletion - no auxiliary power supply needed.

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB-C PD hub applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CYUSB4347-BZXC	Lacks hardware RSA-2048 engine; unsigned firmware only; no signed FW download support	Suitable for cost-sensitive docks where firmware trust chain is not mandated	Select when security certification (e.g., FIDO, Windows Secured-Core) is not required
TUSB8041AIZAYR	No integrated PD controller; requires external TUSB546 or CCGx for Type-C/PD; separate I²C-configurable hub	Requires additional ICs for full PD/Type-C functionality - higher BOM and layout complexity	Select when leveraging existing TI ecosystem or needing pin-to-pin compatibility with legacy TUSB804x designs

Compared with CYUSB4347-BZXC, CYUSB4357-BZXC adds RSA-2048 signing and secure boot enforcement; versus TUSB8041AIZAYR, it eliminates external PD controllers and reduces component count by 3–4 ICs while enabling Ghost Charge™ and unified firmware management.

Availability

CYUSB4357-BZXC is available at Aetrix Electronics and suitable for USB-C docking stations, Thunderbolt-compatible expansion docks, smart monitors with integrated hubs, and enterprise charging solutions requiring stable component supply, long-term lifecycle support, and secure firmware update capability.

Supply support for CYUSB4357-BZXC includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Infineon Technologies acquired Cypress Semiconductor in 2020 and maintains full product continuity, documentation, and support for the former Cypress USB and connectivity portfolio.

CYUSB4357-BZXC belongs to the HX3PD family - designed specifically for single-chip USB-C docking solutions requiring integrated PD 3.0, firmware upgradability, and hardware-enforced security for enterprise and commercial deployments.

FAQ

What USB Power Delivery features does CYUSB4357-BZXC support?

CYUSB4357-BZXC implements full USB PD 3.0 compliance including Extended Messages (up to 260 bytes), chunking for PD 2.0 interoperability, programmable RP current sourcing (1.5/3.0/5.0 A), RD-based UFP detection, and dead-battery termination. It supports DRP on the upstream port and DFP on one downstream port, enabling bidirectional power negotiation and Ghost Charge™ operation.

How is firmware updated on CYUSB4357-BZXC?

Firmware updates occur via the Dock Management Controller using either unsigned (SHA-256 hash verification) or signed (RSA-2048/SHA-256) methods. The host sends metadata and firmware images over USB or I²C; DMC validates signatures/hashes, writes to internal flash, and reports status. Signed updates require pre-provisioned public keys and are enforced by the hardware crypto block.

Does CYUSB4357-BZXC support USB Billboard Class?

Yes - CYUSB4357-BZXC integrates a full-speed USB 2.0 device controller configured as a USB Billboard Device Class. It reports real-time dock status (e.g., "No upstream connection", "Firmware update pending", "OCP triggered") using standardized HID descriptors, visible in OS system trays without custom drivers.

What is the function of the SWDIO/SWDCLK pins on CYUSB4357-BZXC?

SWDIO and SWDCLK provide a two-wire Serial Wire Debug interface compliant with ARM CoreSight standards. These pins enable low-overhead debugging and programming of the embedded Cortex-M0 CPU - used for firmware development, silicon validation, and field failure analysis without requiring JTAG header space or additional debug probes.

CYUSB4357-BZXC Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: HX3PD

Package/Case:: 192-LFBGA

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Applications:: USB 3.1 Hub Controller

Core Processor:: ARM® Cortex®-M0

Program Memory Type:: External Program Memory

Controller Series:: CYUSB

RAM Size:: -

Interface:: GPIO, I2C, SPI

Number of I/O:: 9

Voltage - Supply:: 1.14V ~ 1.26V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 192-FBGA (12x12)

CYUSB4357-BZXC FAQ

1.How can I place an order for CYUSB4357-BZXC through Aetrix?

Please submit a Request for Quotation (RFQ) for CYUSB4357-BZXC on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for CYUSB4357-BZXC reliable?

The price and inventory of CYUSB4357-BZXC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYUSB4357-BZXC is usually 5 days.

3.What payment methods are accepted for CYUSB4357-BZXC?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYUSB4357-BZXC transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CYUSB4357-BZXC?

CYUSB4357-BZXC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CYUSB4357-BZXC order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for CYUSB4357-BZXC?

For technical support, including CYUSB4357-BZXC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYUSB4357-BZXC requirements.

6.How does Aetrix verify that CYUSB4357-BZXC is sourced from the original manufacturer or authorized distributors?

All CYUSB4357-BZXC products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that CYUSB4357-BZXC meets industry standards.

7.What is the process for return or replacement of CYUSB4357-BZXC?

All CYUSB4357-BZXC units undergo pre-shipment inspection (PSI). If there is an issue with CYUSB4357-BZXC, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The CYUSB4357-BZXC part is unused and in its original packaging.

Return procedure for CYUSB4357-BZXC:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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