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Microchip's USB334x family of Hi-Speed USB 2.0 transceivers delivers enhanced USB functionality for the portable market with support for the latest USB-IF Battery Charging 1.2 (BC 1.2) specification. This family of devices dramatically reduces the time required for battery charging and system bill-of-material (BOM) costs by up to 60% over competitive solutions. Microchip has positioned itself as a leader in providing innovative solutions in support of the latest USB-IF Battery Charging specification. The new USB334x provides an excellent compliment to USB charging ports by enabling portable devices to negotiate up to three times the charging current compared to a standard USB port, resulting in faster battery charging. The USB334x is designed in a small footprint package and reduces the number of external components through the integration of voltage regulators and other discretes. Additionally, Microchip's complimentary and confidential USBCheck™ online design review service is available for customers who select the USB334x for their application design-in*.


*The USBCheck online design review service is subject to Microchip's Program Terms and Conditions and requires a myMicrochip account.


        • Highly-integrated, Hi-Speed USB 2.0 transceivers
          • Integrated VBUS over-voltage protection (up to +30V)
          • Integrated USB switch enables connector as a single port for data, charging and audio
          • Integrated regulators allow single supply operation 
        • Extremely high ESD performance in a Hi-Speed USB transceiver
          • ±8kV HBM with up to ±25kV IEC (contact/air)
        • Supports a wide variety of common reference clock frequencies
        • USB-IF Battery Charger revision 1.2 support
        • USB connector as a single port for data, charging and audio
        • Ultra-low standby current
        • "Wrapper-less" architecture for optimized timing performance
        • Hi-Speed USB On-The-Go (OTG) revision 2.0 compliant
        • Link Power Management (LPM)
        • Industrial (-40° to 85°C) temperature range options available
        • QFN, RoHS-compliant package

        Target Applications

        • Digital Still/Video Cameras
        • Smartphones/Cell Phones
        • GPS Personal Navigation Devices
        • MP3/Portable Media Players (PMPs)
        • External Hard Disk Drives
        • Gaming Consoles
 Parameter Name Value
DescriptionMulti-frequency USB 2.0 ULPI PHY IC with Varialbe I/O voltage
Upstream PortULPI
Reference Clock FreqMulti
I/O Voltage (V)1.8V-3.3V
ULPI Input Clock ModeYes
Crystal SupportYes
Battery Charger DetectionYes
Integrated USB SwitchYes
Temp. Range Min.-40
Temp. Range Max.85

Documentation & Software Back To Top

Data SheetsLast UpdatedSize
USB3340 Enhanced Single Supply Hi-Speed USB ULPI Transceiver02/21/20141556KB
Application NotesLast UpdatedSize
AN26.21 - USB Device Design Checklist04/25/2014244KB
AN19.0 - Migrating USB Designs from the USB3320 to the USB3340/USB8334004/25/2014197KB
AN19.17 - ULPI Design Guide04/25/2014375KB
AN19.7 - Battery Charging Using SMSC USB Transceivers04/25/2014313KB
AN20.2 - Optimizing USB 2.0 High Speed Physical Layer Design04/25/2014564KB
AN22.3 - USB334x USB Transceiver Layout Guidelines04/25/2014209KB
BOMLast UpdatedSize
EVB-USB3340 Bill Of Materials03/18/201423KB
CAD ResourceLast UpdatedSize
EVB-USB3340 OrCAD03/18/20141368KB
Gerber FilesLast UpdatedSize
EVB-USB3340 Gerber03/18/20141994KB
SchematicsLast UpdatedSize
EVB-USB3340 Schematic10/07/201449KB
User GuidesLast UpdatedSize
EVB-USB3340 Evaluation Board User Manual05/05/2013614KB
Product BriefsLast UpdatedSize
USB334x Enhanced Single Supply Hi-Speed USB ULPI Transceiver Data Brief02/08/2013308KB

Pricing & Samples Back To Top

 = Sample a part     = Buy a part        All pricing shown in USD only.
Part NumberLeadsPackage TypeTemp RangePacking1-2526-99100+1000-49995000+BuySample
USB3340-EZK32VQFN-40C to +85C TRAY 1.551.291.181.14 *1.12 *
USB3340-EZK-TR32VQFN-40C to +85C T/R 1.551.291.181.14 *1.12 *
* microchipDIRECT "business" account and approved quote required. Open a microchipDIRECT account today!
** Device not available to purchase online. Please contact a sales office for pricing information.

Development Tools Back To Top

RoHS Information Back To Top

Part NumberDevice Weight (Grams) eachShipping Weight (Grams) eachLead Count Package Type Package Width Solder CompositionJEDEC IndicatorRoHSChina EFUP
USB3340-EZK-TR 0.063600 0.142800 32 VQFN 5x5x0.9mm Matte Sn e3
USB3340-EZK 0.063600 0.832653 32 VQFN 5x5x0.9mm Matte Sn e3
To see a complete listing of RoHS data for this device, please click here
Shipping Weight = Device Weight + Packing Material weight. Please contact Sales office if device weight is not available.