Leadtek LR9805ST GPS Module

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Leadtek LR9805ST GPS Module
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Product description

The Leadtek LR9805ST GPS module is a high sensitivity, low power, Surface Mount Device (SMD). This 12-channel global positioning system (GPS) receiver is designed for a broad spectrum of OEM applications and is based on the fast and deep GPS signal search capabilities of SiRFstarII™ single chipset. As the single chip version of the LR9805T, The LR9805ST is pin-to-pin compatible with the LR9805-T for easier and faster transition.

Technical specifications

Hardware and Software features

  • Based on the high performance features of the SiRFstarII single 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 SiRFXTrac software
  • Multiple I/O pins reserved for customizing special user applications
  • RoHS compliance

Performance features

  • Cold/Warm/Hot Start Time: 45/38/4 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


  • TTL level serial port for GPS communications interface
  • Protocol: NMEA-0183 / SiRF Binary (default NMEA)
  • Baud Rate: 4800, 9600, 19200, 38400 or 57600 bps (default 4800)


  • 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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