XR22804


Hi-Speed USB to 10/100 Ethernet Bridge w/4-CH UARTs

Features

  • USB 2.0 Compliant Interface
  • 10/100 Ethernet MAC and Phy
  • Enhanced UART
  • Half-Duplex Mode
  • I2C Multi-master
  • Enhanced Dedicated GPIO Entity (EDGE)
  • Single +5.0V Power Supply Input
  • Regulated +3.3V Output Power
  • Single 25MHz Crystal
  • ±15kV HBM ESD Protection on USB data pins
  • ±8kV HBM ESD Protection on all other pins
Applications

  • USB to Ethernet Dongles
  • POS Terminals
  • Test Instrumentation
  • Networking
  • Factory Automation and Process Controls
  • Industrial Applications
Description

The XR22804 is a Hi-Speed USB 2.0 compound device with an embedded hub and 7 downstream USB functions: 10/100 Ethernet MAC and PHY, 4 UARTs, multi-master capable I2C controller, and an Enhanced Dedicated GPIO Entity (EDGE) controller.

The upstream USB interface has an integrated USB 2.0 PHY and device controller that is compliant with both Hi-Speed (480Mbps) and Full-Speed (12Mbps) USB 2.0. The vendor ID, product ID, power mode, remotewakeup support and maximum power consumption are amongst the values that can be programmed using the on-chip One-Time Programmable (OTP) memory.

The Ethernet 10/100 MAC and PHY are compliant with IEEE 802.3 and supports auto-negotiation, auto-MDIX, checksum offload, auto-polarity correction in 10Base-T and remote wakeup capabilities.

The enhanced UART has a maximum data rate of 15 Mbps. Using a fractional baud rate generator, any baud rate between 300 bps and 15 Mbps can be accurately generated. In addition, the UART has a large 1024-byte TX FIFO and RX FIFO to optimize the overall data throughput for various applications. The automatic RS485 control feature simplifies both the hardware and software for half-duplex RS-485 applications. If required, the multidrop (9-bit) mode feature further simplifies typical multidrop applications by enabling / disabling the UART receiver depending on the address byte received.

The multi-master capable I2C controller and EDGE controller (up to 32 GPIOs) can be accessed via the USB HID interface. The EDGE pins or I2C interface can be used for controlling and monitoring other peripherals. Up to 2 EDGE pins can be configured as a PWM generator.

For UART technical support or to obtain an IBIS model for this product, please email Exar's UART Technical Support group.

Part NumberPkg CodeRoHSMin
Temp.
(°C)
Max
Temp.
(°C)
StatusBuy NowOrder Samples
XR22804IL56TR-FQFN56QFN56-4085Active
XR22804IL56-FQFN56QFN56-4085Active
XR22804-0A-EVBBoard   Active

Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs. 
Specifications
CPU InterfaceUSB 2.0
Ethernet MAC/PHY (Mbps)10/100
UART CH4
UART Max Data Rate (Mbps)15
UART Tx/RX FIFO (Bytes)1024/1024
Auto RS-485 Half-Duplex ControlYes
No. of GPIOs (Max)32
I2C MasterYes
ESD (USB)±15kV HBM
Sup V4.4 - 5.25
PkgsQFN-56