Single Chip 868MHZ to 956MHZ RF Transceiver

  • 2.2 to 3.6 Volt Operation
  • 868 MHz to 956MHz
  • Direct Sequence Spread Spectrum Transceiver
  • Programmable output power
  • Direct-up-conversion I/Q modulator
  • Low-IF I/Q digital receiver
  • RSSI / ED / LQI support for channel assessment
  • FCS computation and CRC detection
  • Low BOM cost and ease of production
  • Frame buffer and internal registers with hardware interrupt accessible via I2C bus
  • Fully integrated loop filter with few external components needed (crystal, capacitors, antenna and matching networks)
  • Maximum 0dBm RF output power in 3dB steps
  • Receiver sensitivity -93 dBm
  • Maximum data rate 250Kbps
  • Industrial temperature (-40 to 85 degrees C)
  • 48-QFN
  • Pb-Free, RoHS Compliant Versions Offered

  • Industrial automation, monitoring and control
  • Point of Sales Systems, Data Collection Terminals
  • Home entertainment and game controllers
  • Home and building alarm and security systems
  • RF idenfication and remote keyless entry
  • Wireless sensor networks

The XR18W753 is a single-chip RF transceiver designed to operate in license-free North American 915MHz ISM, European 868MHz SRD, and 950MHz to 956MHz bands for low-power, short-range wireless applications. Direct Sequence Spread Spectrum technique is employed to provide robust data communication in signal congested RF environments. The device provides extensive hardware support for packet handling, data buffering, packet timing, RSSI, energy detection, link quality indication, clear channel assessment, FCS computation, and CRC detection. RF ouput power is programmable from -24 dBm to 0 dBm with a maximum data rate of 250Kbps.

For evaluation board schematics and user's manual, 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. 
InterfacesI2C Slave
Tx/Rx FIFO (Bytes)n/a
Auto RTS/CTSn/a
5V Tol Inputsn/a
Max Data Rate @ 5/3.3/2.5/1.8V (Mbps)n/a / 0.25 / 0.25 / n/a
Rx Sensitivity @100kbps-94dBm
Rx Sensitivity @250kbps-91dBm
Output Power-24-0dBm
Sup V2.2-3.6V
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Technical Assets
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