USB3450

The USB3450 is a stand-alone Hi-Speed USB Physical Layer Transceiver (PHY). The USB3450 uses a UTMI+ interface to connect to an SOC or ASIC or FPGA. Microchip's advanced proprietary technology minimizes power dissipation, resulting in maximum battery life for portable applications. The USB3450 is a flexible solution for adding USB to new designs without integrating the analog PHY block.

The USB3450 provides a fully compliant Hi-Speed interface, and supports Hi-Speed (HS), Full-Speed (FS), and Low-Speed (LS) USB. The USB3450 supports all levels of the UTMI+ specification.

Features
  • USB-IF "Hi-Speed" certified to the Universal Serial Bus Specification Rev 2.0
  • Interface compliant with the UTMI+ Specification, Revision 1.0
  • Functional as a host or device PHY
  • Supports HS, FS, and LS data rates
  • Supports FS pre-amble for FS hubs with a LS device attached (UTMI+ Level 3)
  • Supports HS SOF and LS keep alive pulse
  • Low Latency Hi-Speed Receiver (43 Hi-Speed clocks Max)
  • Internal 1.8 volt regulators allow operation from a single 3.3 volt supply
  • Internal short circuit protection of DP and DM lines to VBUS or ground
  • Integrated 24MHz Crystal Oscillator supports either crystal operation or 24MHz external clock input
  • Internal PLL for 480MHz Hi-Speed USB operation
  • Supports Hi-Speed USB and legacy USB 1.1 devices
  • 55mA Unconfigured Current (typical) - ideal for bus powered applications
  • 83uA suspend current (typical) - ideal for battery powered applications
  • Full Commercial operating temperature range from 0°C to +70°C
  • 40 pin QFN RoHS compliant package (6 x 6 x 0.9mm height)
Parameter
Parameter Name Value Value
Description USB 2.0 UTMI+ PHY IC USB 2.0 UTMI+ PHY IC
Upstream Port UTMI+ UTMI+
Reference Clock Freq 24MHz 24MHz
I/O Voltage (V) 3.3V 3.3V
Crystal Support Yes Yes
Host Based I/F Yes Yes
Temp. Range Max. 70 70
Documents
USB3450 Hi-Speed USB Host or Device PHY with UTMI+ Interface Data SheetData Sheets03/03/2016690KB
AN18.15 - PCB Design Guidelines for QFN and DQFN PackagesAppNote10/16/2014205KB
AN26.21 - USB Device Design ChecklistAppNote08/10/2015386KB
USB3450 Hi-Speed USB Host or Device PHY with UTMI+ Interface Data BriefProduct Briefs06/06/2008695KB
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RoHS Information
PartNumberDeviceWeightShippingWeightLeadCountPackageTypePackageWidthSolderCompositionJEDECIndicatorRoHSChinaEFUP
USB3450-FZG0.0935000.85714340VQFN6x6x0.9Matte Tine3
USB3450 Hi-Speed USB Host or Device PHY with UTMI+ Interface Data Sheet USB3450
AN18.15 LAN9221
AN26.21 USB3751A-2
USB3450 Hi-Speed USB Host or Device PHY with UTMI+ Interface Data Brief USB3450