Leadtek LR9548SX GPS Module

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Leadtek LR9548SX GPS Module
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Product description

The Leadtek LR9548SX GPS module is a high sensitivity, low power, Surface Mount Device (SMD). This 20-channel global positioning system (GPS) receiver is designed for a wide range of OEM applications and is based on the GPS signal search capabilities of the SiRFstarIII GSC3f/LPx chipset, SiRF’s newest chipset technology. The LR9548SX is also pin-to-pin compatible with the LR9805-III (LR9548) for easier and faster transition.

Technical specifications

Hardware and Software features

  • Based on the high performance features of the SiRFstarIII GSC3f/LPx chipset
  • Compact module size for easy integration: 24x20x2.9 mm (0.94x0.79x0.11 in)
  • Fully automatic assembly: reflow solder assembly ready
  • Hardware compatible with SiRF GSW3 v3.5 software
  • Multiple I/O pins reserved for customizing special user applications
  • RoHS compliance

Performance features

  • Cold/Warm/Hot Start Time: 35/35/1 sec. at open sky and stationary environments.
  • Reacquisition Time: 0.1 second
  • RF Metal Shield for best performance in noisy environments
  • Multi-path Mitigation Hardware
  • Enhanced Navigation Performance
  • Improved Jamming Mitigation
  • Improved Ephemeris Availability


  • TTL level serial port for GPS communications interface
  • Protocol: NMEA-0183/SiRF Binary (default NMEA)
  • Baud Rate: 4800 bps

Key advantages

  • Ideal for high volume mass production(Taping reel package)
  • Cost saving through elimination of RF and board to board digital connectors
  • Flexible and cost effective hardware design for different application needs
  • Secure SMD PCB mounting method
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