USB2228-NU-11 - USB 2.0 Flash Media Controller | Microchip
MPN: USB2228-NU-11 ✓ ActiveUSB2228-NU-11 Overview
A USB flash media controller is a specialized interface IC that bridges a USB host with removable or embedded flash storage. Within the product hierarchy, it is a USB interface controller, an interface IC, and ultimately a semiconductor. The USB2228 family combines USB-to-flash-media interfacing with on-chip card power control, reducing the amount of external circuitry required in systems that expose flash-card storage through a USB connection.
The verified product information identifies USB 2.0 support, fourth-generation controller technology, integrated card power FETs, and a 3.3 V operating supply. The manufacturer product page also identifies support for the xD-Picture Card format for licensees of that format. These features position the device for USB storage readers, embedded media systems, portable electronics, and data-transfer equipment that requires dedicated flash-media interface circuitry.
The USB2228 operates between an external USB host controller and the flash-media side of the design. Its integrated card power FETs manage the power path associated with supported media cards, while on-chip firmware supports reading and writing operations. Compared with a general-purpose USB host controller, this specialized architecture can reduce host-side media-handling complexity and concentrate card-interface logic in a dedicated controller.
Typical applications include USB flash-card readers, compact card-access systems, embedded storage products, and legacy or specialized portable devices using USB 2.0 media connectivity. Design selection should account for the 3.3 V supply requirement, the 128-pin footprint, supported media formats, USB host-controller compatibility, and the card power requirements of the target product.
The most important implementation check is the physical interface. The component uses a 128-pin, 14 mm by 14 mm TQFP package, so layout and assembly plans must use the exact manufacturer pinout and land pattern rather than a generic 128-pin symbol. Input, output, power, ground, card-power, and configuration connectivity must also be verified against the manufacturer documentation.
This page consolidates verified manufacturer and distributor information, distinguishes the available same-family replacement from unverified alternatives, identifies missing technical data without guessing, and provides practical selection and integration guidance for engineers evaluating USB2228-NU-11.
Drop-in alternatives for USB2228-NU-11 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Variants in this series
Same-series models that are drop-in compatible with USB2228-NU-11 (same form factor and footprint) — differing in Host Interface, Package Type, xD-Picture Card Support.
USB2227-NU-11
✅ Drop-InContact for price
View Datasheet →USB2228-NU-11 Specifications
| Product Type | USB 2.0 flash media controller |
| Controller Generation | 4th generation |
| USB Interface | USB 2.0 |
| Operating Supply Voltage | 3.3 V |
| Integrated Card Power FETs | Yes |
| Package Type | 128-pin TQFP |
| Package Body Size | 14 mm x 14 mm |
| Mounting Type | Surface mount |
| Host Interface | USB host controller interface |
| Media Interface | Flash media card interface |
| On-Chip Firmware | Firmware for flash-media read and write operations |
| xD-Picture Card Support | Supported for licensees of the format |
USB2228-NU-11 14 mm x 14 mm Pin Configuration Guide
Pin configuration for USB2228-NU-11 (14 mm x 14 mm package). Pin numbering, functions, and connection diagrams are defined in the manufacturer datasheet. Refer to it for the exact footprint and soldering guidelines.
No detailed pinout data available for USB2228-NU-11.
Refer to the datasheet for full pin configuration.
Typical Applications
USB2228-NU-11 is suitable for 6 applications: USB Flash Card Reader, Embedded USB Storage Access, Portable Media Reader, USB Data Transfer Appliance, Industrial Flash Media Interface, Specialized Flash Media Adapter.
USB Flash Card Reader
The USB2228-NU-11 fits a USB 2.0 flash-card reader because it is specifically designed to interface a USB host controller with flash media and includes integrated card power FETs. The device places media detection, card-power control, and on-chip read/write firmware into one dedicated controller rather than requiring the host processor to implement every flash-media transaction. Its 3.3 V operating supply and 128-pin TQFP footprint are important constraints for a compact reader design. Before layout release, engineers should verify the exact supported card formats, connector pin mapping, insertion-removal behavior, and card-power timing against the manufacturer documentation.
Recommended
Embedded USB Storage Access
USB2228-NU-11 is suitable for embedded systems that expose flash-media storage through an external USB 2.0 connection. Its specialized role between the USB host controller and flash media allows the host software to focus on file-level behavior rather than all card-control functions. On-chip firmware supports media reads and writes, while integrated card power FETs simplify the card-power path. The design must still validate the host-controller transaction model, flash-media electrical requirements, supply sequencing, and enclosure or connector integration. Its 128-pin, 14 mm by 14 mm package requires careful fanout planning rather than use of a generic 128-pin footprint.
Recommended
Portable Media Reader
The USB2228-NU-11 can support compact portable media readers that require dedicated flash-card handling and USB 2.0 connectivity. Its 3.3 V supply operation suits low-voltage portable electronics, while the integrated card power FETs reduce the number of external power-path components. The controller is intended to work with a separate USB host controller, so battery-powered products must include an appropriate host or OTG strategy. Engineering review should cover card insertion tolerance, suspend and resume behavior, media-format support, current limits, and thermal performance. Mechanical design should preserve the 14 mm by 14 mm TQFP land pattern and the required high-speed and power routing geometry.
Recommended
USB Data Transfer Appliance
USB2228-NU-11 is appropriate for data-transfer appliances that move files between a computer or embedded host and flash media. The fourth-generation USB 2.0 controller architecture is designed specifically for the flash-media side of the interface, and on-chip firmware handles low-level read and write operations. This can simplify firmware partitioning when a USB host processor already provides the upper-level USB stack. The design review must verify media compatibility, host-driver behavior, card-power sequencing, and connector safety. Because the verified material does not provide complete electrical timing or thermal ratings, engineers should use the Microchip documentation for all implementation limits rather than extrapolate from generic USB devices.
Recommended
Industrial Flash Media Interface
USB2228-NU-11 can be evaluated for industrial equipment that requires controlled access to flash media over USB 2.0. The dedicated media controller separates card-specific I/O from the host processor, while integrated card power FETs support a more compact implementation. Industrial suitability depends on the temperature range, endurance expectations, supported formats, and long-term availability stated in the current manufacturer documentation, none of which are fully provided in the verified snippets. A production design should also assess ESD protection, ground continuity, power-fault behavior, and recovery after card removal. The exact 128-pin pinout and footprint must be confirmed before schematic capture is released.
Recommended
Specialized Flash Media Adapter
USB2228-NU-11 is a practical choice for a specialized adapter that exposes supported flash-card media to a USB host. The controller provides the media-facing interface, integrated card-power switching, and firmware for read and write transactions. This allows the adapter to use a host controller optimized for USB transactions instead of making the host processor directly manage media power and command-level details. The Microchip product page identifies xD-Picture Card support for licensees of that format, making format licensing an explicit qualification item. Engineers must verify every required format, enforce applicable licensing terms, and validate insertion, removal, fault recovery, and high-speed signal behavior on the final board.
Recommended
Recommended Products Summary
Engineering reference data for USB2228-NU-11 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | USB2227-NU-11 |
|---|---|---|
| Product Type | USB 2.0 flash media controller | USB flash media controller |
| Brand | Microchip Technology | Microchip Technology |
| Package | 128-pin TQFP (14 x 14 mm) | 128-pin VTQFP (14 x 14 mm) |
Key Differentiators
- Dedicated fourth-generation flash-media controller (vs USB2227-NU-11)
- Integrated card power control (vs USB2227-NU-11)
- Targeted USB host-to-flash-media interface (vs USB2250-NU-05)
Design Notes
Use the exact 128-pin, 14 mm by 14 mm manufacturer land pattern and pin assignment rather than treating every 128-pin TQFP as electrically interchangeable. Confirm pin names, exposed thermal or power requirements, and recommended copper geometry from the Microchip documentation. The supplied snippets do not provide the individual pinout, so schematic and PCB artwork must not be finalized from package dimensions alone.
Plan the 3.3 V rail and card-power path together because the USB2228 includes integrated card power FETs. Validate insertion current, removed-card behavior, power-off state, and fault response with the supported media and connector implementation. Decoupling values, operating limits, and sequencing requirements were not included in the verified data and must be taken from the manufacturer datasheet rather than copied from a generic USB controller.
Route USB and flash-media signals using the reference layout and impedance guidance in the manufacturer documentation. Keep sensitive interfaces away from card-power switching paths, preserve continuous ground references, and minimize stubs between the controller and external devices. The USB2228-NU-11 is a USB 2.0 flash-media interface controller, so signal-integrity verification should cover both the host-facing USB side and the media-facing side.
Do not substitute USB2227-NU-11 or another controller solely because it has a 128-pin, 14 mm by 14 mm package. Package count and body size do not prove pin-to-pin compatibility. Review supported media, power sequencing, firmware behavior, signal assignments, electrical limits, and licensing requirements before approving a substitution. The available evidence supports USB2227-NU-11 as a related family candidate but does not provide a complete drop-in matrix.
Compliance Information
The supplied verified web snippets do not explicitly state material, environmental, or automotive qualification compliance for USB2228-NU-11. These fields require confirmation from the current manufacturer product documentation or declarations.
