SIM68M - GPS GLONASS Galileo GNSS Module | SIMCom
Teilenummer: SIM68M ✓ Aktiv| Menge | Stückpreis | Gesamt |
|---|---|---|
| 1 | $5.11 | $5,11 |
| 10 | $5 | $50,00 |
| 100 | $4.85 | $485,00 |
| 500 | $4.6 | $2.300,00 |
| 1.000 | $4.42 | $4.420,00 |
SIM68M Übersicht
A GNSS (Global Navigation Satellite System) module is an RF receiver that down-converts, acquires and tracks satellite signals, then computes position, velocity and time (PVT) solutions. Within the system hierarchy, it belongs to the GNSS receiver family, a subset of RF transceiver modules and location/navigation ICs. Modules like the SIM68M integrate the RF front end, baseband engine and navigation firmware into one SMT unit, saving designers months of RF development compared to chip-level designs.
Key features include an MTK high-sensitivity navigation engine delivering industry-leading acquisition accuracy and Time-to-First-Fix (TTFF) at low power consumption. A built-in LNA removes the need for an external low-noise amplifier, and reception works down to -165 dBm without an assistance network. EASYTM self-generated orbit prediction (Embedded Assist System) combined with AlwaysLocateTM technology dramatically reduces TTFF in cold-start and periodic-wakeup scenarios. PPS output support enables precision time applications.
Technically, SIM68M supports autonomous GPS/GLONASS/QZSS/SBAS (WAAS, EGNOS, MSAS, GAGAN) operation and simultaneous multi-constellation tracking of mixed satellite signals on the 1575-1616 MHz L1 bands. The SMT LCC package with castellated edges suits standard reflow assembly and automated optical inspection, and the antenna is connected through an RF pad on the module edge.
Typical applications include vehicle and asset trackers, fleet management telematics, drone and UAV navigation, and IoT location beacons, where low power, fast TTFF and multi-constellation robustness in urban canyons matter most.
Design consideration: supply the module from a clean 2.8 V to 4.3 V rail (typ. 3.3 V), keep a 1 ppm-class TCXO-equipped passive antenna within 1-2 m of the module, and reserve PCB area for the 18-pad footprint so the pin-compatible SIM68ML variant can be adopted later.
This page synthesizes distributor pricing, verified specifications from the SIMCom specification and hardware design documents, and practical design notes not found in the manufacturer datasheet.
Drop-in-Alternativen für SIM68M – gleiches Gehäuse, Pin-kompatibel. Bauteile mit anderem Gehäuse, die eine PCB-Überarbeitung erfordern, sind ausgeschlossen.
Schnellvergleichstool – Wählen Sie Alternativbauteile für den Direktvergleich:
SIM68ML
✅ Drop-In📋 Referenzalternative (nicht im Katalog)
SIM68A
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
SIM68R
✅ Drop-In ⚠️ Spezifikationen ungeprüft📋 Referenzalternative (nicht im Katalog)
SIM68M Spezifikationen (herstellerveröffentlicht)
| Product Type | GNSS receiver module (GPS/GLONASS/Galileo/QZSS) |
| Constellations | GPS, GLONASS, Galileo, QZSS, SBAS (WAAS) |
| Frequency Band | L1, 1575 MHz to 1616 MHz |
| Tracking Channels | 33 tracking / 99 acquisition channels |
| Tracking Sensitivity | -165 dBm (without assistance network) |
| Navigation Engine | MTK high-sensitivity engine |
| Supply Voltage Range | 2.8 V to 4.3 V |
| Typical Supply Voltage | 3.3 V |
| Built-in LNA | Yes (no external LNA required) |
| AGPS Support | EASYTM self-generated orbit prediction |
| Low-Power Mode | AlwaysLocateTM technology |
| PPS Output | Supported |
| Antenna | Not included (external antenna via RF pad) |
| Gehäuse | 18-pin SMT LCC (SMD-18P) |
| Montageart | Surface Mount |
| RoHS-Status | Compliant (per JLCPCB listing) |
SIM68M Schnittstellen & Anschlüsse
SIM68M bietet die folgenden, vom Hersteller veröffentlichten Schnittstellen und Anschlüsse: Leistungsaufnahme. Pinbelegung der Erweiterungsheader, Nummerierung der Anschlüsse und elektrische Grenzwerte sind in der Herstellerdokumentation definiert.
| Leistungsaufnahme | 2.8 V to 4.3 V |
Siehe die Herstellerdokumentation für die vollständige Pinbelegung der Erweiterungsleiste und die Nummerierung der Steckverbinder-Pins.
Leistungs- und thermische Eigenschaften
| Leistungsaufnahme | 2.8 V to 4.3 V |
Vom Hersteller veröffentlichte Leistungs- und thermische Parameter für SIM68M.
Typische Anwendungen
SIM68M ist geeignet für 6 Anwendungs: Vehicle and Asset Tracking, Drone and UAV Navigation, IoT Location Beacons, Precision Time Reference (NTP/PPS), Handheld and Portable Navigation Devices, Security and Surveillance Asset Monitoring.
Vehicle and Asset Tracking
Fleet telematics and asset trackers demand continuous position availability under foliage, urban canyons and parking structures. The SIM68M fits because its simultaneous GPS, GLONASS, Galileo and QZSS reception on 33 tracking channels keeps enough satellites in view when GPS-only receivers drop fixes, and its -165 dBm tracking sensitivity holds positions indoors or under dense cover without an assistance network. In a typical tracker, the module connects to an external active or passive antenna through its RF pad, outputs NMEA sentences over UART to the host MCU, and provides PPS for timestamping. AlwaysLocateTM reduces average current for battery-backed trackers by duty-cycling acquisition while maintaining acceptable position staleness, making multi-month deployments practical.
Empfohlen
Drone and UAV Navigation
UAV autopilots need fast, reliable position fixes at low weight and power. The SIM68M suits this role because the MTK navigation engine delivers the industry's high level of TTFF, critical for quick pre-flight lock, and multi-constellation reception improves geometric dilution of precision (GDOP) in open sky, directly improving hover and waypoint-hold accuracy. The built-in LNA means no external LNA stage is needed, saving board area and BOM cost on compact flight controllers. The module's SMT LCC package withstands vibration when properly corner-glued, and the PPS output can discipline flight-controller time sync. At a 3.3 V supply it integrates directly with common 3.3 V autopilot rails without level shifting.
Empfohlen
IoT Location Beacons
Battery-powered IoT beacons report position periodically, so receiver energy per fix dominates battery life. The SIM68M addresses this with AlwaysLocateTM, which intelligently schedules tracking and reacquisition, and with EASYTM AGPS that generates orbit predictions locally so warm starts need no network assistance - a major advantage for devices without cellular connectivity. Its 2.8-4.3 V input accepts a single lithium cell through a small LDO, and -165 dBm sensitivity allows fixes under building overhangs or vehicle dashboards where weaker receivers time out. Typical beacons wake the module, parse NMEA over UART, then cut power, achieving multi-year battery life from the low per-fix consumption enabled by the MTK engine.
Empfohlen
Precision Time Reference (NTP/PPS)
Network appliances and industrial controllers use GNSS as a time source, relying on the module's 1PPS output discipline. The SIM68M's PPS support, combined with multi-constellation tracking, keeps the pulse-per-second output stable even when GPS alone would lose lock, because GLONASS and Galileo satellites supplement the timing constellation. Tracking down to -165 dBm maintains timing through degraded sky views on rooftops or window-mounted antennas. In an NTP stratum device, the host MCU latches the PPS edge with a timer capture and pairs it with NMEA time-of-day sentences over UART, achieving sub-microsecond-class alignment typical of GNSS-disciplined oscillators without a costly OCXO.
Empfohlen
Handheld and Portable Navigation Devices
Portable navigators, dog trackers and outdoor instruments need small size, low power and fast reacquisition after indoor excursions. The SIM68M's compact 18-pad LCC SMT package fits small handheld PCBs under standard reflow assembly, and the MTK engine's high sensitivity plus EASYTM orbit prediction minimize the frustrating wait for a fix after the user exits a building. Simultaneous GPS/GLONASS/Galileo/QZSS reception keeps position continuity when walking between tall buildings, where single-constellation receivers stutter. Operating from a 2.8-4.3 V rail, the module runs directly from a 3.3 V system supply or a single lithium cell via LDO, and its low tracking consumption spares the battery during continuous navigation mode.
Empfohlen
Security and Surveillance Asset Monitoring
GPS loggers embedded in surveillance trailers, cargo seals and valuables cases require covert, battery-fed operation with dependable fix capture. The SIM68M's AlwaysLocateTM technology balances tracking continuity against consumption, while EASYTM self-generated orbit prediction enables rapid wake-and-fix cycles when a motion sensor triggers acquisition - the module does not need network-delivered assistance, important for standalone covert devices. Its -165 dBm sensitivity captures positions in containers, vehicle trunks and under metal enclosures where conventional receivers fail, and the SMT LCC construction survives shock and temperature swings typical of unattended outdoor deployments. NMEA output integrates easily with logging MCUs.
Empfohlen
Zusammenfassung der empfohlenen Produkte
Technische Referenzdaten für SIM68M – Vergleich, Designhinweise und Compliance-Informationen.
Auswahlhilfe
Vergleich mit Alternativen
| Parameter | Dieses Produkt | SIM68ML | SIM68A | SIM68R |
|---|---|---|---|---|
| Package | 18-pin SMT LCC (SMD-18P) | 18-pin SMT LCC (SMD-18P) - same | 18-pin SMT LCC (SMD-18P) - same | 18-pin SMT LCC (SMD-18P) - same |
| Brand | SIMCom Wireless Solutions | SIMCom Wireless Solutions | SIMCom Wireless Solutions | SIMCom Wireless Solutions |
| Constellations | GPS, GLONASS, Galileo, QZSS, SBAS | GPS, GLONASS, Galileo, QZSS, SBAS | GPS/QZSS-focused (verify in datasheet) | GPS, GLONASS |
| Tracking Sensitivity | -165 dBm | -165 dBm | -165 dBm | -165 dBm |
| Tracking / Acquisition Channels | 33 / 99 | 33 / 99 | 33 / 99 | 33 / 99 |
| Supply Voltage | 2.8 V to 4.3 V | 2.8 V to 4.3 V | 2.8 V to 4.3 V | 2.8 V to 4.3 V |
| AGPS / Low-Power Features | EASYTM AGPS, AlwaysLocateTM | EASYTM AGPS, AlwaysLocateTM | EASYTM AGPS, AlwaysLocateTM | EASYTM AGPS, AlwaysLocateTM |
Wichtigste Unterscheidungsmerkmale
- Full multi-constellation reception (GPS+GLONASS+Galileo+QZSS) (vs. SIM68R)
- Built-in LNA with -165 dBm tracking (vs. u-blox NEO-6M)
- Network-independent AGPS (EASYTM) (vs. SIM68A)
Designhinweise
Supply the SIM68M from a clean 2.8 V to 4.3 V rail with 3.3 V as the design target. Place at least a 10 uF bulk capacitor plus a 1 uF and 100 nF ceramic close to the VCC pad. Avoid sharing the rail with a GSM/RF power amplifier such as the SIM800 family: PA burst currents can sag the supply and cause position resets - use an LDO or ferrite isolation between the PA rail and the GNSS module. Estimated: with a typical 3.3 V rail and a 0.5 ohm series trace resistance, a 500 mA transient would cause only 250 mV of droop, but shared inductance on a thin trace can be far worse.
Keep the RF pad-to-antenna trace at 50 ohm, ideally with a coplanar waveguide and a solid ground plane directly beneath. Place the antenna at least 15 mm from the module and keep the keep-out zone under the patch antenna free of copper. Reserve the exact 18-pad LCC footprint in your layout so the SIM68ML lead-free variant can be adopted without redesign. Follow the SIM68M Hardware Design reference layout for pad geometry; deviations commonly cause reflow solder bridging on the castellated pads.
Do not route the UART NMEA lines directly to a 5 V host MCU: the module logic is 2.8-4.3 V domain, so use a level translator or resistive divider for RX into the module. Give the EASYTM AGPS feature time - first boot after a long power-off needs a clear sky view for several minutes to regenerate orbit predictions; repeatedly power-cycling the module during acquisition prevents EASYTM data from being saved. Also confirm the antenna DC feed requirements: if using an active antenna, verify the module pad provides bias or add an external bias-T per the Hardware Design guide.
Compliance-Informationen
RoHS compliance per JLCPCB part listing (C2999762). REACH, halogen-free and conflict-minerals declarations not stated in provided data - request certificates from SIMCom.
