FireFly X1 - GNSS module for GPS, GLONASS, Galileo & QZSS applications

The FireFly X1 from G Top is a multi-GNSS standalone modules with simultaneous multi-constellation support, offering superior positioning accuracy and ultra fast time to first fix ( TTFF).

The Global Top, FireFly X1 GPS module combines miniature size with flexible multi-interface connectivity options such s SPI and I²C, that can simplify a user's design, making it ideal for M2M applications that typically use low-cost micro processors with limited serial interfaces.

The FireFly X1 module utilizes MediaTek's new generation MT3333 GNSS chipset and supports various location and navigation applications including autonomous GPS, GLONSS, GALILEO, QZSS, SBAS, DGPS (RTCM) and AGPS. The FireFly X1 supports up to 210 PRN channels with 99 search channels and 33 simultaneous tracking channels.

The MT3333 chipset has the industry's highest level of sensitivity (-165dBm) as well as instant Time-to-First Fix (TTFF). It also combines many advanced features including AlwaysLocate™, EASY™, EPO™ and logger function.


  • Size = 9.0 x 9.5 x 2.1 mm
  • MT3333 (GPS/Glonass/Beidou/Galileo)
  • UART, RTCM, 1PPS, I2C, SPI• AGPS, EASY, SBAS, Logger, Anti-Jamming,
  • <2.5m SBAS ,-165dBm,
  • 18 mA tracking
  • RTC, TCXO, SMPS, Additional LNA, SAW filter
  • Approvals : CE, FCC, ROHS, REACH

Please contact us for more information on GlobalTop's comprehensive range of positioning modules and support services.

Dimensions 9mm x 9.5mm x 2.1mm, 20 PIN QFN SMD
Chipset MTK MT3333, 99 Channels
Frequency GPS L1, 1575.42MHz
GLONASS L1, 1598.0625~1605.375MHz
GALILEO E1, 1575.42MHz
Sensitivity Acquisition -148dBm
Tracking -165dBm
Position Accuracy Without aid: 3.0m (50% CEP)
TTFF (Time to First Fix) Cold Start: <35 seconds (typical)
Warm Start: <33 seconds (typical)
Hot Start: <1 second (typical)
Timing Accuracy (1PPS Output) ±10ns RMS
Protocol NMEA 0183, MTK Command
AGPS Supported (Offline Mode)
Interface 2 UART
Baud Rate 4800 ~ 115200 bps
Update Rate 1 ~ 10 Hz
Power Supply VCC: 3.0V to 4.3V
VBACKUP: 2.0V to 4.3V
Current Consumption Acquisition: 26 mA Typical
Tracking: 25 mA Typical
Working Temperature -40°C to +85°C
  • Vehicle Tracking (AVL)
  • Personal Tracker
  • Covert Asset Tracking
  • Mobile Devices
  • PND
  • M2M
  • Precise Timing Equipment

Compare's range of GPS and GNSS standalone and antenna modules here

Part Number Description

GlobalTop FireFly X1 GPS / Glonass module, 9.0mm x 9.5mm x 2.1 mm.

Packaging: Tape on reel, 1500 pcs per reel

Firmware configurations:


GlobalTop GPS module evaluation kit with User Manual, Software Application Program, CP210X USB Bridge VCP driver, MiniGPS tool with user manual, USB Connector Cable, External Antenna (where applicable).

N.B. The required module for evaluation must be specified when ordering.

The GlobalTop GMM-3301-EVB-KIT, GPS Module Evaluation Kit is the best way of testing the performance of GlobalTop Mediatek GNSS modules. Not only does it simplify the evaluation process, it also helps engineers during the design phase.

G.topEvalKit-300pxThe evaluation board can communicate with a computer via a USB cable, and the module can be controlled through the Mini GPS Tool or PMTK commands (available through request).

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Last updated: 14 October 2019