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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

Download All Documents
Data SheetsLast UpdatedSize
USB3340 Enhanced Single Supply Hi-Speed USB ULPI Transceiver02/21/20141556KB
ErrataLast UpdatedSize
USB334x Family Silicon Errata and Data Sheet Clarification04/22/2015172KB
Application NotesLast UpdatedSizeDownload All
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
AN26.21 - USB Device Design Checklist08/10/2015386KB
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

Similar Devices Back To Top

ProductUpstream PortDownstream PortsI/O Voltage (v)5K Pricing

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 0.138000 32 VQFN 5x5x0.9mm Matte Tin e3
USB3340-EZK 0.063600 0.734694 32 VQFN 5x5x0.9mm Matte Tin 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.