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Microchip Technology USB2641I-HZH-02
- Part No.:
- USB2641I-HZH-02
- Manufacturer:
- Microchip Technology
- Category:
- Specialized
- Package:
- 48-VFQFN Exposed Pad
- Datasheet:
-
USB2641I-HZH-02.pdf
- Description:
- IC INTERFACE SPECIALIZED 48QFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,302
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Product details
Overview
USB2641I-HZH-02 from Microchip Technology is a USB 2.0 Hi-Speed hub IC with integrated flash media controller supporting SD 2.0, MMC 4.2, and Memory Stick 1.43/Pro/Duo formats. It delivers three downstream ports - one dedicated to internal flash media interface and two exposed for external peripherals - and operates across -40°C to +85°C industrial temperature range in a 48-pin QFN (7 × 7 mm) package.
For engineers reviewing the USB2641I-HZH-02 datasheet, USB2641I-HZH-02 pinout, USB2641I-HZH-02 application, or USB2641I-HZH-02 equivalent, key selection considerations include its dual-role architecture (hub + media controller), programmable PortMap/PortSwap/PHYBoost features, 8051 core with 64 KB ROM/9 KB RAM, and support for SPI/I²C configuration and USB-based firmware updates.
Technical Context
The USB2641I-HZH-02 integrates a transaction translator (TT) enabling concurrent Full-Speed and Low-Speed peripheral operation on all enabled downstream ports, while its hardware-controlled data flow architecture optimizes throughput for self-mapped flash media. The device uses an internal 1.8 V regulator powered from a single 3.3 V supply, reducing BOM count and power complexity.
Its 8051 microprocessor runs at 60 MHz (single-cycle execution), manages hub enumeration and media protocol translation, and supports runtime reconfiguration via external I²C EEPROM or SPI Flash. Unlike the USB2640i variant, USB2641I-HZH-02 excludes xD-Picture Card interface pins and associated logic - confirmed by pin table omission and explicit datasheet note.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| USB Compliance | USB 2.0 Hi-Speed hub with TT; supports LS/FS/HS downstream devices |
| Flash Media Support | SD 2.0 (HC/HS), MMC 4.2 (1/4/8-bit, streaming), MS 1.43/Pro 1.02/Pro-HG 1.01/Duo 1.10 |
| Core Processor | 8051 8-bit MCU @ 60 MHz single-cycle; 64 KB ROM, 9 KB RAM |
| Power Architecture | Single 3.3 V input; internal 1.8 V core regulator eliminates need for external LDO |
| Package | 48-pin QFN, 7 × 7 mm, RoHS-compliant, ePad ground |
| Operating Temp | -40°C to +85°C industrial grade - validated for embedded systems in harsh environments |
| Configuration Interface | I²C EEPROM or SPI Flash; supports vendor ID/product ID customization and USB-based EEPROM update |
Pinout & Package
USB2641I-HZH-02 is housed in a 48-pin QFN (7 × 7 mm) with exposed thermal pad (ePad) requiring multiple vias to VSS. Pin functions are grouped into USB upstream/downstream interfaces, SD/MMC/MS media bus, SPI control, power management, and system control signals. All VDD33 pins (7 total) must be decoupled per datasheet requirements; CRFILT and PLLFILT require ≥1.0 µF low-ESR capacitors.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| USB+, USB- | Upstream differential pair | Connects to host USB port; supports PortSwap for PCB layout optimization |
| USBDN_DP2 / USBDN_DM2 USBDN_DP3 / USBDN_DM3 | Downstream differential pairs | Two exposed USB 2.0 ports; each includes integrated series termination and pull-up/down resistors |
| PRTCTL2, PRTCTL3 | Port power control / OCS monitor | Drives external FETs for port power; also senses over-current when asserted high |
| SD_D[7:0], SD_CLK, SD_CMD, SD_nCD, SD_WP | Secure Digital interface | Full 8-bit SD/MMC bus with clock, command, card detect, and write-protect - no xD signals present |
| MS_D[7:0], MS_BS, MS_INS, MS_SCLK | Memory Stick interface | Supports serial and parallel MS modes; MS_INS provides active-high card insertion detection |
| SPI_CE_n, SPI_CLK, SPI_DO, SPI_DI | SPI configuration interface | Enables external firmware loading; SPI_SPD_SEL pin selects 30 MHz or 60 MHz operation |
| CRD_PWR | Flash media slot power driver | 100–200 mA 3.3 V output; powers SD/MMC/MS slots; configurable as GPIO if unused |
| nRESET, TEST, LED | System control & status | nRESET is active-low asynchronous reset; TEST must be grounded; LED drives activity indicator |
Key Features
| Feature | Design Value |
|---|---|
| PortMap | Programmable port disable/reordering enables single hardware design across multiple platform configurations |
| PortSwap | Per-port D+/D− pin location programming eliminates trace crossing and mismatch on PCB |
| PHYBoost | Four-level programmable transceiver drive strength compensates for signal degradation from long traces or cables |
| Integrated TT & regulators | Eliminates need for external transaction translator IC and 1.8 V LDO, reducing component count and board area |
| OEM-configurable IDs | Vendor ID, product ID, language ID, and 28-character media string customizable via external EEPROM |
Applications
| Desktop PC Expansion Hub | Industrial Media Gateway |
|---|---|
Use Scenario: Adding USB ports and built-in SD/MS card reader to compact desktop motherboards or mini-PCs. IC Role / Device Role / Timing Role: USB2641I-HZH-02 acts as compound device - hub controller and flash media reader - enumerated as separate interfaces under single USB address. Use Value: Reduces bill-of-materials by integrating two functions; supports hot-plug SD/MS cards without additional controller IC or firmware stack. | Use Scenario: Enabling field-upgradable storage in ruggedized industrial HMIs or data loggers operating at -40°C to +85°C. IC Role / Device Role / Timing Role: USB2641I-HZH-02 serves as secure, temperature-hardened media interface bridging USB host to removable flash cards in sealed enclosures. Use Value: Industrial temp rating and integrated EMI/ESD protection ensure reliable operation in electrically noisy factory environments. |
| Printer Embedded Card Reader | GPS Navigation System |
Use Scenario: Adding SD card support to multifunction printers for direct photo printing or firmware updates. IC Role / Device Role / Timing Role: USB2641I-HZH-02 operates as mass storage class device presenting SD card contents to host OS via standard USB MSC protocol. Use Value: Enables plug-and-play compatibility with Windows/macOS/Linux without custom drivers; leverages existing USB host stack. | Use Scenario: Supporting map updates and media playback via SD card in automotive-grade GPS units. IC Role / Device Role / Timing Role: USB2641I-HZH-02 bridges USB host processor to SD card using optimized hardware data path - bypassing CPU for bulk transfers. Use Value: Sustained transfer rates >35 MB/s (host/media dependent) accelerate large map file loading and reduce user wait time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar USB hub + flash media controller applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| USB2640I-HZH-02 | Includes full xD-Picture Card interface (18 pins); same package, ROM/RAM, and hub architecture | Required where xD card support is mandatory (e.g., legacy digital cameras, medical imaging) | Select USB2640I-HZH-02 only if xD compatibility is needed; otherwise USB2641I-HZH-02 reduces pin count and simplifies layout |
| USB2514B-AEZG | 4-port Hi-Speed hub only - no integrated flash media controller; requires external SD/MS controller and firmware | Suitable for designs needing more downstream ports but no built-in card reader | Choose USB2514B-AEZG when scalability beyond 2 external ports is critical and media interface is handled separately |
Compared with USB2640I-HZH-02, USB2641I-HZH-02 removes xD functionality to simplify design and reduce cost, while retaining identical hub performance, media support for SD/MMC/MS, and industrial temperature capability. Against USB2514B-AEZG, it trades port count for integration - eliminating external media controller, firmware, and associated BOM items.
Availability
USB2641I-HZH-02 is available at Aetrix Electronics and suitable for desktop PC expansion hubs, industrial media gateways, printer embedded card readers, and GPS navigation systems requiring stable component supply, long-term lifecycle assurance, and industrial-grade reliability.
Supply support for USB2641I-HZH-02 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
Microchip Technology Inc. is a U.S.-based semiconductor manufacturer specializing in microcontrollers, analog devices, and connectivity solutions for industrial, automotive, and consumer markets.
The USB2641I-HZH-02 belongs to Microchip's USB Hub + Flash Media Controller product line, designed to reduce system complexity in embedded applications requiring both USB port expansion and removable flash storage access.
FAQ
What flash memory card standards does USB2641I-HZH-02 support?
USB2641I-HZH-02 supports Secure Digital 2.0 (including HC and HS variants), MultiMediaCard 4.2 (1/4/8-bit and streaming mode), and Memory Stick families (MS 1.43, MS Pro 1.02, MS Pro-HG 1.01, MS Duo 1.10). It explicitly excludes xD-Picture Card support - a distinction confirmed in the datasheet and reflected in its reduced pin count versus USB2640I-HZH-02.
Does USB2641I-HZH-02 require external crystal or can it use oscillator input?
USB2641I-HZH-02 supports both options: a 24 MHz crystal connected between XTAL1 and XTAL2, or an external 24 MHz 1.8 V clock applied to XTAL1 (CLKIN) with XTAL2 left open. When using external clock, a resistor divider is required to step down 5 V VBUS to 1.8 V for proper level compatibility - a requirement explicitly stated in the USB2641I-HZH-02 datasheet.
How is firmware updated on USB2641I-HZH-02?
Firmware for USB2641I-HZH-02 is updated via USB using the built-in bootloader - no JTAG or external programmer required. The device enumerates as a USB device allowing host-side tools to rewrite its internal configuration EEPROM over the USB interface. This capability applies to vendor ID, product ID, media strings, and operational parameters stored in external I²C/SPI ROM.
What is the function of CRD_PWR pin on USB2641I-HZH-02?
The CRD_PWR pin on USB2641I-HZH-02 is a 3.3 V, 100–200 mA power driver dedicated to supplying the multiplexed SD/MMC/MS card slot. It is not a general-purpose GPIO by default - its primary role is powering flash media; however, if card power is managed externally, CRD_PWR may be repurposed as a GPIO. Its use is mandatory for MS/SD slot power per datasheet specification.
Can USB2641I-HZH-02 operate as a self-powered hub?
Yes, USB2641I-HZH-02 supports both bus-powered and self-powered configurations. In self-powered mode, VBUS_DET must be pulled up (typically to VDD33) to indicate presence of external power, enabling full downstream port functionality including higher current delivery. The hub's internal regulators and power control logic automatically adapt based on this detection state - a behavior verified in Section 1.2.1 of the USB2641I-HZH-02 datasheet.
USB2641I-HZH-02 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Microchip Technology
- Series:
- -
- Package/Case:
- 48-VFQFN Exposed Pad
- Packaging:
- Tray
- Product Status:
- Active
- Applications:
- Controller
- Interface:
- -
- Voltage - Supply:
- 3.3V
- Supplier Device Package:
- 48-QFN (7x7)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
USB2641I-HZH-02 FAQ
1.How can I place an order for USB2641I-HZH-02 through Aetrix?
Please submit a Request for Quotation (RFQ) for USB2641I-HZH-02 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 USB2641I-HZH-02 reliable?
The price and inventory of USB2641I-HZH-02 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for USB2641I-HZH-02 is usually 5 days.
3.What payment methods are accepted for USB2641I-HZH-02?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for USB2641I-HZH-02 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for USB2641I-HZH-02?
USB2641I-HZH-02 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your USB2641I-HZH-02 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 USB2641I-HZH-02?
For technical support, including USB2641I-HZH-02 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your USB2641I-HZH-02 requirements.
6.How does Aetrix verify that USB2641I-HZH-02 is sourced from the original manufacturer or authorized distributors?
All USB2641I-HZH-02 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 USB2641I-HZH-02 meets industry standards.
7.What is the process for return or replacement of USB2641I-HZH-02?
All USB2641I-HZH-02 units undergo pre-shipment inspection (PSI). If there is an issue with USB2641I-HZH-02, 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 USB2641I-HZH-02 part is unused and in its original packaging.
Return procedure for USB2641I-HZH-02:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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