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Home > Products > Integrated Circuits (ICs) > Interface > Specialized

Microchip Technology USB2227-NU-09

Name: USB2227-NU-09
Brand: Microchip Technology
SKU: USB2227-NU-09
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: USB2227-NU-09

Manufacturer:: Microchip Technology

Category:: Specialized

Package:: 128-TQFP

Datasheet:: USB2227-NU-09.pdf

Description:: IC INTFACE SPECIALIZED 128VTQFP

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Product details

Overview

USB2227-NU-09 from Microchip Technology is a USB 2.0 Bulk-Only Mass Storage Class peripheral controller IC integrating flash media interface logic, an 8051 microprocessor core, USB 2.0 transceiver, on-chip 1.8V regulator, and three integrated 3.3V power FETs (100mA/100mA/200mA). It supports simultaneous multi-card-type enumeration-CF/ATA in True IDE mode, SD/MMC, Memory Stick PRO, SmartMedia-and enables single-chip USB-to-flash readers for embedded host systems.

For engineers reviewing the USB2227-NU-09 datasheet, USB2227-NU-09 pinout, USB2227-NU-09 application, or USB2227-NU-09 equivalent, key selection criteria include its dual-role GPIOs (card power control + interrupt-capable inputs), hardware ECC support for NAND/SM, SD Security Command Extensions, firmware-upgradable ROM via USB, and native compatibility with Windows, macOS, and Linux mass storage class drivers without custom driver development.

Technical Context

The USB2227-NU-09 integrates a 30 MHz 8051 CPU core with 12 KB internal SRAM and 768-byte program SRAM, coupled to dedicated flash media controllers (CF, SD/MMC, MS/PRO, SM) sharing a unified DMA engine and ECC unit. Its USB subsystem includes a full-speed/low-speed compatible PHY, SIE, and double-buffered 512-byte bulk endpoint with 64-byte control endpoints.

Timing is managed by an internal PLL generating 480 MHz for USB sampling and configurable MCU clocks (24 MHz crystal or 48 MHz external source), while three GPIOs (GPIO8/10/11) serve as programmable card power outputs with current-limited drive (100 mA / 100 mA / 200 mA), eliminating external FETs for most flash card interfaces.

Key Specifications

Parameter	Value and Actual Design Meaning
USB Interface	USB 2.0 compliant Bulk-Only Mass Storage Class peripheral; includes integrated transceiver and SIE - enables direct connection to host without external PHY or protocol stack.
Flash Media Support	CF/ATA (True IDE only), SD/SDHC/MMC, Memory Stick PRO/Duo, SmartMedia - supports one active device per group (CF/ATA, SM/xD/NAND, SD/MMC) simultaneously.
CPU Core	8051-based 8-bit microcontroller running at 30 MHz (4-cycle/instruction); 12 KB scratchpad SRAM + 768-byte program SRAM - sufficient for real-time card protocol handling and USB enumeration.
On-Chip Power FETs	Three integrated 3.3V power switches: GPIO8/10 = 100 mA each, GPIO11 = 200 mA - directly powers SD/MMC, MS/PRO, and SM cards without external MOSFETs or regulators.
ECC & Security	Hardware 1-bit ECC correction for NAND/SM; SD Security Command Extensions support - ensures data integrity during raw flash access and enables secure SD operations.
Package	128-pin VTQFP (14 mm × 14 mm, 1.0 mm height, RoHS-compliant) - standard surface-mount footprint with exposed thermal pad for thermal management in compact reader designs.
Supply Voltages	VDD33 = 3.0–3.6 V; VDD18 = 1.8 V (core); VDD18PLL = 1.8 V (PLL); VDDA33 = 3.3 V (analog) - requires separate low-ESR bypassing per supply rail per datasheet layout guidelines.

Pinout & Package

USB2227-NU-09 is housed in a 128-pin VTQFP package (14 mm × 14 mm, 1.0 mm height, RoHS-compliant) with exposed thermal pad. Pin functions are grouped by interface: CompactFlash (CF_nCS0/1, CF_D[15:0], CF_IRQ), SmartMedia (SM_nWP, SM_ALE, SM_D[7:0]), Memory Stick (MS_BS, MS_SDIO, MS_SCLK), SD/MMC (SD_DAT[3:0], SD_CLK, SD_CMD), USB (USBDP/USBDM), and 15 GPIOs with dual functionality (e.g., GPIO8/CRD_PWR0).

Pin/Terminal	Circuit Role	Design Meaning
GPIO8 / CRD_PWR0	Card Power Output / General Purpose I/O	Configurable 3.3V @ 100 mA output for SD/MMC or MS power; also usable as edge-sensitive interrupt input or push-pull output.
GPIO10 / CRD_PWR1	Card Power Output / General Purpose I/O	Configurable 3.3V @ 100 mA output for MS/PRO or SM power; supports same GPIO modes as GPIO8.
GPIO11 / CRD_PWR2	Card Power Output / General Purpose I/O	Configurable 3.3V @ 200 mA output for high-current SM or CF auxiliary power; highest-drive GPIO with identical interrupt/output flexibility.
CF_nCS0 / CF_nCS1	CompactFlash Chip Select	Active-low signals selecting CF task file registers (nCS0) and device (nCS1) in True IDE mode - required for ATA command execution and data transfer.
SD_DAT[3:0]	SD/MMC Bidirectional Data Bus	Four 3.3V-tolerant I/O pins with internal weak pull-ups - support 1-/4-bit SD and MMC data transfers including CMD response parsing and DAT line arbitration.

Key Features

Feature	Design Value
Integrated Card Power FETs	Three on-die 3.3V power switches eliminate need for external MOSFETs, reducing BOM count and PCB area in multi-format readers.
Hardware ECC Engine	1-bit error correction performed in silicon for SmartMedia and NAND flash - improves reliability without CPU overhead or latency penalty.
Firmware Upgrade via USB	Supports in-system reprogramming of boot-block Flash memory over USB bus - enables field updates of card protocol stacks and security patches.
Multi-LUN Mass Storage Compliance	Native support for multiple logical units (LUNs) across CF, SD, and MS - allows single USB descriptor to expose up to four independent storage devices to host OS.
GPIO Flexibility	15 GPIOs with edge-triggered interrupts, activity LED control, write-protect polarity inversion, and SmartDetach auto-eject - simplifies system-level integration without external logic.

Applications

USB Flash Card Reader	Industrial Data Logger
Use Scenario: Embedded USB host in kiosk or point-of-sale terminal reads customer loyalty cards (SD, CF, MS) for transaction logging. IC Role / Device Role / Timing Role: USB2227-NU-09 acts as USB peripheral controller and flash media bridge, translating USB MSC commands into native CF/SD/MS protocols with hardware-accelerated ECC and power sequencing. Use Value: Single-chip solution reduces bill-of-materials cost by 30% versus discrete controller + FET + level-shifter designs while maintaining full Windows/macOS/Linux driver compatibility.	Use Scenario: Ruggedized field logger captures sensor data to removable SD or CF cards, then uploads via USB to central server. IC Role / Device Role / Timing Role: USB2227-NU-09 manages hot-plug detection, card power ramp-up/down, and wear-leveling-aware block writes - ensuring data integrity during intermittent power and vibration. Use Value: Integrated 200 mA CRD_PWR2 (GPIO11) powers high-capacity SDXC cards reliably; hardware SD Security Extensions enable encrypted logging without software crypto overhead.
Medical Imaging Device	Automotive Infotainment
Use Scenario: Portable ultrasound machine stores DICOM images on SD or CF cards and exports via USB to PACS workstations. IC Role / Device Role / Timing Role: USB2227-NU-09 serves as certified medical-grade mass storage interface, enforcing strict timing on CF True IDE handshaking and SD command timeouts per IEC 62304. Use Value: On-chip 1.8V regulator and PLL ensure stable clocking under variable load; dual-buffered 512-byte bulk endpoint sustains >35 MB/s sustained read throughput from CF Ultra II cards.	Use Scenario: In-vehicle head unit reads navigation maps from SD cards and user media from MS/PRO sticks, presenting both as separate drives over USB. IC Role / Device Role / Timing Role: USB2227-NU-09 implements SmartDetach mode - automatically disconnects USB when no card is inserted - meeting automotive power-off sequencing requirements. Use Value: GPIO-configurable write-protect polarity and cover-switch operation for xD compliance reduce firmware complexity; 15 GPIOs support LED status, button inputs, and CAN-linked power control.

USB Flash Card Reader

Industrial Data Logger

Use Scenario: Embedded USB host in kiosk or point-of-sale terminal reads customer loyalty cards (SD, CF, MS) for transaction logging.

IC Role / Device Role / Timing Role: USB2227-NU-09 acts as USB peripheral controller and flash media bridge, translating USB MSC commands into native CF/SD/MS protocols with hardware-accelerated ECC and power sequencing.

Use Value: Single-chip solution reduces bill-of-materials cost by 30% versus discrete controller + FET + level-shifter designs while maintaining full Windows/macOS/Linux driver compatibility.

Use Scenario: Ruggedized field logger captures sensor data to removable SD or CF cards, then uploads via USB to central server.

IC Role / Device Role / Timing Role: USB2227-NU-09 manages hot-plug detection, card power ramp-up/down, and wear-leveling-aware block writes - ensuring data integrity during intermittent power and vibration.

Use Value: Integrated 200 mA CRD_PWR2 (GPIO11) powers high-capacity SDXC cards reliably; hardware SD Security Extensions enable encrypted logging without software crypto overhead.

Medical Imaging Device

Automotive Infotainment

Use Scenario: Portable ultrasound machine stores DICOM images on SD or CF cards and exports via USB to PACS workstations.

IC Role / Device Role / Timing Role: USB2227-NU-09 serves as certified medical-grade mass storage interface, enforcing strict timing on CF True IDE handshaking and SD command timeouts per IEC 62304.

Use Value: On-chip 1.8V regulator and PLL ensure stable clocking under variable load; dual-buffered 512-byte bulk endpoint sustains >35 MB/s sustained read throughput from CF Ultra II cards.

Use Scenario: In-vehicle head unit reads navigation maps from SD cards and user media from MS/PRO sticks, presenting both as separate drives over USB.

IC Role / Device Role / Timing Role: USB2227-NU-09 implements SmartDetach mode - automatically disconnects USB when no card is inserted - meeting automotive power-off sequencing requirements.

Use Value: GPIO-configurable write-protect polarity and cover-switch operation for xD compliance reduce firmware complexity; 15 GPIOs support LED status, button inputs, and CAN-linked power control.

Equivalent & Alternatives

The following parts are listed as comparable options for similar USB flash media controller applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
USB2241-AEZG	Successor generation with enhanced SDXC/SDUHS support, 64 KB internal ROM, and improved ESD tolerance (±8 kV HBM); lacks integrated 200 mA FET (GPIO11).	Required for UHS-I SD card readers; not drop-in compatible due to different pinout and higher VDD18 current draw.	Select USB2241-AEZG when supporting SDXC cards above 32 GB or requiring extended lifecycle availability beyond USB2227 end-of-life.
GL827L-16	Single-chip USB 2.0 SD/MS/CF controller with integrated FETs but no 8051 core; relies on fixed-function logic and external EEPROM for configuration.	Limited to predefined card combinations; no firmware upgrade path or GPIO programmability - suitable only for cost-sensitive, static-reader designs.	Choose GL827L-16 for high-volume consumer readers where feature flexibility is secondary to BOM cost and footprint minimization.

Compared with USB2227-NU-09, USB2241-AEZG offers future-proof SDXC support but requires PCB redesign and higher power budget, while GL827L-16 sacrifices configurability and field-upgradability for lower unit cost and smaller package - making USB2227-NU-09 optimal for mid-volume industrial readers needing long-term stability and multi-format adaptability.

Availability

USB2227-NU-09 is available at Aetrix Electronics and suitable for industrial data loggers, medical imaging devices, automotive infotainment systems, and embedded USB flash card readers requiring stable component supply across multi-year production cycles.

Supply support for USB2227-NU-09 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 leading provider of microcontrollers, analog components, and connectivity solutions, headquartered in Chandler, Arizona, with global design and manufacturing operations.

The USB2227-NU-09 belongs to Microchip's fourth-generation USB 2.0 flash media controller family, engineered specifically for single-chip, multi-format USB mass storage peripherals targeting industrial, medical, and automotive embedded hosts.

FAQ

What flash memory card types does the USB2227-NU-09 support?

The USB2227-NU-09 supports CompactFlash (CF and CF Ultra I/II) in True IDE mode only, Secure Digital (SD), Mini-SD, TransFlash, MultiMediaCard (MMC), Reduced Size MMC (RS-MMC), SmartMedia (SM), Memory Stick (MS), Memory Stick Duo (MSDUO), and Memory Stick PRO (MSPRO). It does not support xD Picture Card, as explicitly noted in the datasheet footnote. Each interface is handled by dedicated on-die controllers synchronized via a shared DMA and ECC engine.

Does the USB2227-NU-09 require external memory to operate?

No, the USB2227-NU-09 can operate using its internal ROM for firmware execution. The GPIO6/ROMEN pin determines boot source: when pulled low, it enables external program memory (up to 64 KB Flash/SRAM/EPROM); when left unconnected or pulled high, the device boots from internal ROM. Internal resources include 12 KB scratchpad SRAM and 768-byte program SRAM, sufficient for full multi-LUN operation without external memory.

How does the USB2227-NU-09 manage power for different flash cards?

The USB2227-NU-09 integrates three programmable 3.3V power FETs on GPIO8 (100 mA), GPIO10 (100 mA), and GPIO11 (200 mA), enabling direct card power control without external components. These pins are software-configurable per card type - for example, GPIO11 typically powers SM or CF auxiliary rails, while GPIO8/10 handle SD/MMC and MS/PRO. Power sequencing, voltage ramp rates, and overcurrent protection are managed in hardware per Microchip's reference schematics.

Is the USB2227-NU-09 compatible with modern operating systems?

Yes, the USB2227-NU-09 is fully compatible with Microsoft Windows XP, Windows ME, Windows 2000 SP3, Apple macOS 10.x, Linux (with standard usb-storage driver), and Softconnex drivers. Legacy support for Windows 98/98SE and macOS 8.6/9 is available via Microchip-provided drivers. Its compliance with USB 2.0 Bulk-Only Mass Storage Class ensures plug-and-play operation without custom driver installation on all supported platforms.

Can the USB2227-NU-09 be used in hot-plug applications?

Yes, the USB2227-NU-09 supports hot insertion of flash cards via dedicated card-detect pins (CF_nCD1/2, SM_nCD, MS_INS, SD_nCD) with internal weak pull-ups and interrupt capability. Its GPIOs support SmartDetach mode - automatically detaching from USB when no card is present - which is essential for notebook and portable applications. All card interfaces meet hot-plug electrical requirements per JEDEC and SD Association specifications.

USB2227-NU-09 Specifications

Product attributes: Attribute value

Manufacturer:: Microchip Technology

Series:: -

Package/Case:: 128-TQFP

Packaging:: Tray

Product Status:: Obsolete

Applications:: Controller

Interface:: -

Voltage - Supply:: 3.3V

Supplier Device Package:: 128-VTQFP (14x14)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

USB2227-NU-09 FAQ

1.How can I place an order for USB2227-NU-09 through Aetrix?

Please submit a Request for Quotation (RFQ) for USB2227-NU-09 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 USB2227-NU-09 reliable?

The price and inventory of USB2227-NU-09 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for USB2227-NU-09 is usually 5 days.

3.What payment methods are accepted for USB2227-NU-09?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for USB2227-NU-09 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for USB2227-NU-09?

USB2227-NU-09 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your USB2227-NU-09 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 USB2227-NU-09?

For technical support, including USB2227-NU-09 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your USB2227-NU-09 requirements.

6.How does Aetrix verify that USB2227-NU-09 is sourced from the original manufacturer or authorized distributors?

All USB2227-NU-09 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 USB2227-NU-09 meets industry standards.

7.What is the process for return or replacement of USB2227-NU-09?

All USB2227-NU-09 units undergo pre-shipment inspection (PSI). If there is an issue with USB2227-NU-09, 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 USB2227-NU-09 part is unused and in its original packaging.

Return procedure for USB2227-NU-09:

1.Submit a request within 90 days.

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

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