Exar – XR22801: USB to Ethernet and UART Bridge

The XR22801 provides an upstream USB interface with an integrated USB 2.0 PHY a d device controller that is compliant with USB 2.0 Hi-Speed (480Mbps) and Full-Speed (12Mbps) transfer rates. Downstream there is an Ethernet controller with integrated 10/100 Ethernet MAC and PHY compliant to IEEE 802.3, an enhanced UART with a fractional baud rate generator (supporting 300bps to 15Mbps), a multi-master capable I2C controller, and an Enhanced Dedicated GPIO Entity (EDGE) controller.


  • USB 2.0 compliant interface
  • Enhanced UART
  • I2C multi-master
  • Single +5.0V power supply input
  • ±15kV HBM ESD protection on USB data pins
  • ±8kV HBM ESD protection on all other pins
  • Single 25MHz crystal
  • 10/100 Ethernet controller
  • Half-duplex mode
  • EDGE
  • Regulated +3.3V output power
  • 32- or 56-pin QFN packages
  • 1k MSRP: $2.85 US