LR9548SLP is a high sensitivity, low power GPS module from Leadtek Research. It is based on the high performance features of the SiRFstarIII low power single chipset and supports 20 channels. It can be used in PDA, Pocket PC and other computing devices, as well as car navigation, fleet management, asset tracking, AVL and location-based services.
The Leadtek LR9548SLP is a high‑sensitivity, low‑power SMD GPS receiver with a 20‑channel SiRFstarIII™ chipset. It is intended for OEM integration in devices such as PDAs, car and marine navigation units, fleet‑management trackers, and hand‑held positioning tools. The module offers a compact size (24 × 20 × 2.9 mm) and multiple I/O pins for custom applications, and it complies with RoHS requirements.
Key specifications include a power supply range of 3.3 – 5.0 VDC, continuous power consumption of 165 mW, and a cold‑start time of 42 seconds. It provides TTL‑level serial communication supporting NMEA‑0183 and SiRF binary protocols at baud rates from 4800 to 57600 bps. The module operates from –40 °C to +85 °C, weighs 2.5 g, and delivers position accuracy of about 10 m (2‑D RMS).
| Chipset | SiRFstarIII low power single |
|---|---|
| Frequency | L1 1575.42 MHz |
| Channels | 20 |
| Position Accuracy | 10 m (2‑D RMS) |
| Velocity Accuracy | 0.1 m/s |
| Power Supply Voltage | 3.3 – 5.0 VDC |
| Power Consumption (continuous) | 165 mW |
| Operating Temperature Range | -40 °C to +85 °C |
| Weight | 2.5 g |
| Serial Baud Rates | 4800, 9600, 19200, 38400, 57600 bps |
| Interface Protocol | NMEA‑0183 (default) / SiRF Binary |
| Cold‑Start Time | 42 seconds |
| Hot‑Start Time | 1 second |
| Reacquisition Time | 0.1 second |
The module consumes 165 mW in continuous mode.
A hot start typically takes about 1 second.
It operates from –40 °C up to +85 °C.
Supported baud rates are 4800, 9600, 19200, 38400 and 57600 bps.