Wireless UART Controller

  • 2.25 to 3.63 Volt Operation
  • 5 Volt Tolerant Inputs
  • 8051 Microcontroller
  • 32KB System Memory
  • 128-bit AES Engine
  • I2C Bus Master Interface to RF Transceivers
  • Optional UART interface to RF Transceiver
  • Selectable Serial or Parallel Mode Interface
  • Enhanced UART
    • 16550 Compatible Register Set
    • Parallel mode data rate from 1200 bps to 230.4 Kbps
    • Serial mode data rate from 1200 bps to 921.6Kbps
    • Transmit and Receive FIFOs of 64 bytes
    • TX and RX FIFO Trigger Levels
    • Transmit and Receive FIFO Level Counters
    • Automatic Hardware (RTS/CTS) Flow Control
    • Selectable Auto RTS Flow Control Hysteresis
    • Full modem interface
  • Device Identification and Revision
  • 48-pin QFN package
  • Pb-Free, RoHS Compliant Versions Offered

  • Industrial Automation
  • Factory Automation
  • Point of Sales Systems
  • Industrial Servers
  • Data Collection Terminals

The XR18W750 is a Wireless UART Controller with a two-wire I2C interface to the XR18W753 RF transceiver to complete Exar's Wireless UART chipset solution. The XR18W750 supports both the parallel and serial interfaces to any host system thus providing flexibility for system designers to select their interface option. The XR18W750 includes an embedded 8051 microprocessor which provides the power to process the protocol framing for data transmission and to handle error processing. Internally, the XR18W750 has a 32KB system memory for loading the firmware from an external EEPROM and for data processing. The XR18W750 also includes a 128-bit AES engine for data encoding and decoding.

The XR18W750 is available in a 48-pin QFN package.

For evaluation board schematics, user's manuals and firmware requests, please contact Exar's UART Technical Support group.

Part NumberPkg CodeRoHSMin
StatusBuy NowOrder Samples

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. 
InterfacesParallel (8-bit), Serial, I2C Master
Tx/Rx FIFO (Bytes)64/64
5V Tol InputsYes
Max Data Rate @ 5/3.3/2.5/1.8V (Mbps)n/a / 1 / 1 / n/a
Rx Sensitivity @100kbpsn/a
Rx Sensitivity @250kbpsn/a
Output Powern/a
Sup V2.25-3.63V
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