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

Infineon Technologies CYUSB2025-BZXI

Name: CYUSB2025-BZXI
Brand: Infineon Technologies
SKU: CYUSB2025-BZXI
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: CYUSB2025-BZXI

Manufacturer:: Infineon Technologies

Category:: Application Specific Microcontrollers

Package:: 121-TFBGA

Datasheet:: CYUSB2025-BZXI.pdf

Description:: IC USB CTLR 121BGA

Quantity:: RFQ Add To RFQ list

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Product details

Overview

CYUSB2025-BZXI from Infineon Technologies is a USB 2.0 High-Speed mass-storage peripheral controller integrating dual SD/MMC/SDIO host ports (S0 and S1), a certified USB 2.0 peripheral interface with 32 physical endpoints, I²C master up to 1 MHz, and ARM926EJ-S core. It supports UHS-I SDR50/DDR50, eMMC 4.4, and SDIO 3.0 in embedded card readers, USB thumb drives, and SD slot-equipped TVs/STBs.

For engineers reviewing the CYUSB2025-BZXI datasheet, CYUSB2025-BZXI pinout, CYUSB2025-BZXI application, or CYUSB2025-BZXI equivalent, key selection considerations include dual-port SDIO/SD/eMMC concurrency, USB Attached SCSI (UAS) support, ultra-low-power core shutdown (<60 µA), 19.2–52 MHz clock flexibility, and BGA-144 package compatibility with industrial storage bridge designs.

Technical Context

The CYUSB2025-BZXI implements a dual-port storage architecture enabling independent or interleaved operation of S0 and S1 ports across SD/SDIO/eMMC combinations - including SD+SDIO, MMC+SDIO, and SD+MMC configurations. Its USB 2.0 peripheral interface supports both Mass Storage Class (MSC) and USB Attached SCSI (UAS) for optimized throughput and command queuing.

It features separate power domains for core (VDDCORE) and I/O (VIO3, VIO5), enabling voltage scaling per interface: VIO5 powers the I²C bus (1.2/1.8/2.5/3.3 V selectable), while VIO3 supplies SDIO/SD/MMC signaling. Clocking is managed via internal PLL with configurable input sources - 19.2 MHz crystal or 19.2/26/38.4/52 MHz external clock - with phase noise compliance down to –130 dBc/Hz at 1 MHz offset.

Key Specifications

Parameter	Value and Actual Design Meaning
USB Compliance	USB 2.0 Hi-Speed (480 Mbps) and Full-Speed (12 Mbps) peripheral; certified; supports UAS and MSC classes
Storage Ports	Dual independent ports (S0 & S1); each supports SD 3.0, eMMC 4.4, SDIO 3.0, UHS-I SDR50/DDR50
Endpoints	32 physical USB endpoints (16 IN + 16 OUT); enables multi-LUN and streaming support
I²C Master	Up to 1 MHz; operates only as master; supports clock stretching; VIO5-supplied; pull-ups required to VIO5
Core Power	<60 µA in core power-down with VBATT on; <20 µA with VBATT off; enables battery-backed standby
Clock Input	Selectable: 19.2 MHz crystal or 19.2/26/38.4/52 MHz external clock; FSLC[2:0] configures source and frequency
Package	10 × 10 mm, 0.8 mm pitch BGA-144; RoHS-compliant; thermal pad exposed on underside

Pinout & Package

Package: 10 × 10 mm, 0.8 mm pitch ball grid array (BGA-144) with exposed thermal pad (pin 144 = VSS_THERMAL). Designed for high-density PCB layouts with controlled impedance routing for USB D+/D− and SDIO signal groups.

Pin/Terminal	Circuit Role	Design Meaning
D+, D−	USB 2.0 differential pair	Hi-Speed/Full-Speed USB physical layer; require 90 Ω differential impedance and ESD protection
S0_SD0–S0_SD7, S0_CMD, S0_CLK, S0_WP, S0S1_INS	S0 port SDIO/SD/MMC signals	8-bit data bus + control lines for first storage device; supports 4-bit/8-bit SD, 4-bit/8-bit eMMC, SDIO
S1_SD0–S1_SD7, S1_CMD, S1_CLK, S1_WP, MMC1_RST_OUT	S1 port SDIO/SD/MMC signals	Independent second storage interface; identical capability to S0; enables dual-slot or bridge functionality
I2C_SCL, I2C_SDA	I²C master interface	Open-drain outputs; require external pull-up resistors to VIO5; used for boot EEPROM or configuration ICs
XTALIN, XTALOUT, CLKIN, CLKIN_32	Clock inputs	Support crystal (19.2 MHz) or external clock (19.2–52 MHz); CLKIN_32 for 32 kHz watchdog reference

Key Features

Feature	Design Value
Dual independent storage ports	Enables concurrent SD + eMMC, SDIO + SD, or dual SD card operation without arbitration overhead
USB Attached SCSI (UAS) support	Reduces command latency and enables native command queuing for faster file transfers vs. legacy MSC
Configurable clock input	FSLC[2:0] pins select between 19.2 MHz crystal or four external clock frequencies - simplifies board-level clock sourcing
Multi-voltage I/O domains	VIO5 (I²C) and VIO3 (SDIO) operate independently; allows mixed-voltage system integration (e.g., 1.8 V SD + 3.3 V I²C)
ARM926EJ-S core	Embedded 32-bit RISC processor with 512 kB SRAM; enables firmware customization for protocol translation and security logic

Applications

USB Thumb Drive

SD Card Reader

Use Scenario: Compact portable storage device connecting via USB to PCs or media players.

IC Role / Device Role / Timing Role: Acts as USB-to-SDIO bridge; handles FAT32/ExFAT translation and wear leveling via embedded ARM926EJ-S.

Use Value: Enables single-chip design with UAS acceleration for >30 MB/s sequential read; eliminates external microcontroller.

Use Scenario: Multi-format card reader supporting SD, microSD, and MMC in laptops or docking stations.

IC Role / Device Role / Timing Role: Dual-port controller managing simultaneous SD and eMMC access; provides hot-plug detection via S0S1_INS and MMCx_RST_OUT.

Use Value: Reduces BOM count by integrating PHY, USB stack, and dual SDIO controllers - no external level shifters needed for 1.8/3.3 V cards.

Laptop SD Slot

TV/STB SD Expansion

Use Scenario: Integrated SD card slot in ultrabooks requiring low-power, always-on readiness.

IC Role / Device Role / Timing Role: USB peripheral presenting as mass storage; enters <60 µA core power-down when idle but retains VBATT context.

Use Value: Extends battery life during sleep mode while preserving card state - critical for instant-resume user experience.

Use Scenario: SD slot in smart TV or set-top box for firmware updates, app caching, or DVR expansion.

IC Role / Device Role / Timing Role: Bridges USB host (via internal hub or SoC) to SDIO Wi-Fi module or eMMC-based storage expansion.

Use Value: Supports SDIO 3.0 4-bit mode at 208 Mbps for real-time video buffering; isolates noisy SDIO traffic from HDMI/AV subsystems.

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB-to-SDIO bridge applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
CYUSB2024-BZXI	Single storage port (S0 only); no S1 port; identical USB/UAS/I²C specs and package	Not suitable for dual-slot or SDIO+eMMC bridge use cases; lower pin count and cost	Select when only one SD/MMC device is required and board space/cost optimization is prioritized
GL827L-16	No ARM core; fixed-function USB-SD/MMC bridge; supports only SD 2.0 and MMC 4.2; no UAS or I²C master	Lacks firmware programmability and dual-port concurrency; limited to basic card reader applications	Choose for cost-sensitive, non-upgradable USB card readers where UAS or SDIO 3.0 is not required

Compared with CYUSB2025-BZXI, CYUSB2024-BZXI reduces functionality to a single-port solution with identical power and USB performance, while GL827L-16 offers a simpler, lower-cost alternative without programmability or modern SDIO 3.0 support - making CYUSB2025-BZXI optimal for feature-rich, future-proof storage bridges.

Availability

CYUSB2025-BZXI is available at Aetrix Electronics and suitable for USB SDIO bridges, embedded card readers, and SD slot expansion modules requiring stable component supply, long-lifecycle support, and automotive-grade reliability validation.

Supply support for CYUSB2025-BZXI 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 is a German semiconductor manufacturer specializing in power management, sensor, and connectivity solutions for automotive, industrial, and consumer markets.

CYUSB2025-BZXI belongs to Infineon's SD2 family of USB mass-storage controllers, designed specifically for high-performance, low-power USB-to-SDIO/eMMC bridging in portable and embedded storage systems.

FAQ

What boot sources does CYUSB2025-BZXI support?

CYUSB2025-BZXI supports boot from USB, I²C-connected EEPROM, eMMC on S0-Port, or SPI flash (Infineon S25FS064S/S25FS128S/S25LFL064L and Winbond W25Q32FW). Boot source is selected via PMODE[2:0] pin strapping, with fallback to USB boot enabled on failure for most configurations.

Does CYUSB2025-BZXI support SDXC cards?

Yes, CYUSB2025-BZXI supports SDXC cards via SD 3.0 specification compliance, including exFAT file system handling through firmware running on its embedded ARM926EJ-S core. It supports UHS-I SDR50 and DDR50 modes required for SDXC performance tiers.

Can the two storage ports operate simultaneously?

Yes, S0 and S1 ports operate independently and can be accessed concurrently or interleaved. Supported combinations include SD+eMMC, SD+SDIO, and SDIO+SDIO - enabling true dual-device operation without software arbitration or bandwidth contention.

What is the maximum I²C clock frequency supported?

The maximum I²C clock frequency is 1 MHz, achievable when VIO5 supply is 1.8 V, 2.5 V, or 3.3 V. At 1.2 V VIO5, maximum frequency is limited to 100 kHz. Clock stretching is supported, and external pull-up resistors to VIO5 are mandatory for proper bus operation.

CYUSB2025-BZXI Specifications

Product attributes: Attribute value

Manufacturer:: Infineon Technologies

Series:: EZ-USB™ SD2

Package/Case:: 121-TFBGA

Packaging:: Tray

Product Status:: Active

Programmable:: Not Verified

Applications:: SD2™ USB and Mass Storage Peripheral Controller

Core Processor:: ARM9®

Program Memory Type:: -

Controller Series:: CYUSB

RAM Size:: 512K x 8

Interface:: I2C, I2S, MMC/SD, SPI, UART, USB

Number of I/O:: 59

Voltage - Supply:: 1.15V ~ 1.25V

Operating Temperature:: -40°C ~ 85°C

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 121-FBGA (10x10)

CYUSB2025-BZXI FAQ

1.How can I place an order for CYUSB2025-BZXI through Aetrix?

Please submit a Request for Quotation (RFQ) for CYUSB2025-BZXI 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 CYUSB2025-BZXI reliable?

The price and inventory of CYUSB2025-BZXI are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CYUSB2025-BZXI is usually 5 days.

3.What payment methods are accepted for CYUSB2025-BZXI?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CYUSB2025-BZXI transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for CYUSB2025-BZXI?

CYUSB2025-BZXI orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your CYUSB2025-BZXI 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 CYUSB2025-BZXI?

For technical support, including CYUSB2025-BZXI datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CYUSB2025-BZXI requirements.

6.How does Aetrix verify that CYUSB2025-BZXI is sourced from the original manufacturer or authorized distributors?

All CYUSB2025-BZXI 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 CYUSB2025-BZXI meets industry standards.

7.What is the process for return or replacement of CYUSB2025-BZXI?

All CYUSB2025-BZXI units undergo pre-shipment inspection (PSI). If there is an issue with CYUSB2025-BZXI, 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 CYUSB2025-BZXI part is unused and in its original packaging.

Return procedure for CYUSB2025-BZXI:

1.Submit a request within 90 days.

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

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