SIM868 - Quad-Band GSM/GPRS + GNSS Module | SIMCom
MPN: SIM868 ✓ Hoạt độngSIM868 Tóm tắt
A GSM/GPRS module is a wireless communication subsystem that provides cellular voice, SMS, and packet-switched data connectivity over 2G mobile networks. Within the system hierarchy, it sits between the antenna/RF front end and the host microcontroller, abstracting the cellular protocol stack behind AT commands over UART. Modules such as the SIM868 belong to the broader family of cellular IoT modules, which also includes 3G, 4G/LTE, and LPWA (Cat-M/NB-IoT) devices.
Key features include worldwide quad-band operation at 850/900/1800/1900 MHz, GPRS multi-slot class data rates up to 85.6 kbps in both downlink and uplink, and a co-located GNSS receiver supporting GPS, GLONASS, and BeiDou (BDS) constellations for positioning without a second module.
The SIM868 integrates abundant extension interfaces: UART, USB 2.0, I2C, GPIO, dual SIM card interfaces, and an SD card interface. The dual-SIM capability is a differentiator versus the earlier SIM808, enabling multi-carrier failover designs. The compact LCC and LGA pad design significantly reduces development time and cost for GNSS-enabled M2M applications, and the module is ROHS compliant.
Typical applications include asset tracking, vehicle fleet monitoring, anti-theft systems, and general M2M IoT devices that need both cellular telemetry and satellite positioning in a single footprint.
Design considerations: supply the module from a low-impedance 3.4V to 4.4V rail capable of handling GSM transmit burst currents, and verify antenna keep-out areas in the 17.6 x 15.7 mm footprint region.
This page synthesizes distributor pricing, availability, drop-in alternative analysis, and design notes not found in the manufacturer datasheet. According to the SIMCom product page, the SIM868 combines a complete quad-band GSM/GPRS engine with GNSS technology for satellite navigation.
Bộ thay thế dễ dàng lắp đặt cho SIM868 — cùng gói, chân-to-chân tương thích. Các bộ phận yêu cầu hàn PCB bị loại trừ.
Các biến thể trong loạt này
Các mẫu cùng loạt có thể lắp đặt dễ dàng tương thích với SIM868 (cùng hình factor và footprint) — khác nhau ở Interfaces, Package, Supply Voltage.
SIM808
✅ Drop-In📋 Tham chiếu thay thế (không có trong danh mục)
SIM800C
✅ Drop-InLiên hệ để biết giá
Xem tài liệu →SIM868 Thông số kỹ thuật (bản công bố của nhà sản xuất)
| Product Type | GSM/GPRS + GNSS (GPS/GLONASS/BDS) module |
| Cellular Technology | GSM/GPRS quad-band 2G |
| Frequency Bands | 850/900/1800/1900 MHz |
| GNSS Systems | GPS/GLONASS/BDS |
| GPRS Data Rate Downlink | 85.6 kbps |
| GPRS Data Rate Uplink | 85.6 kbps |
| Điện áp cung cấp | 3.4 V to 4.4 V |
| Idle Current | 650 uA |
| Nhiệt độ hoạt động | -40C to +85C |
| Interfaces | UART, USB 2.0, I2C, GPIO, SIM card, SD card |
| SIM Interface | Dual SIM card |
| Hộp | LCC/LGA SMD, 17.6 x 15.7 mm |
| Kiểu lắp đặt | Surface Mount (SMD) |
| Trạng thái RoHS | Compliant |
Giao diện và cáp kết nối SIM868
SIM868 mở ra các giao diện và cáp kết nối sau được công bố bởi nhà sản xuất: Công suất đầu vào. Các chân mở rộng, số thứ tự cáp kết nối và giới hạn điện học được xác định trong tài liệu hướng dẫn của nhà sản xuất.
| Công suất đầu vào | 3.4 V to 4.4 V |
Tham khảo: hướng dẫn của nhà sản xuất cho bản đồ chân cổng mở rộng và số thứ tự chân kết nối đầy đủ.
Đặc tính điện và nhiệt
| Công suất đầu vào | 3.4 V to 4.4 V |
| Nhiệt độ hoạt động | -40C to +85C |
Các thông số điện và nhiệt của SIM868 được công bố bởi nhà sản xuất.
Ứng dụng tiêu biểu
SIM868 phù hợp cho 6 Áp dụngs: Asset Tracking, Vehicle Fleet Monitoring, Anti-Theft Security Systems, M2M IoT Telemetry Devices, Portable and Battery-Powered Trackers, Industrial Remote Monitoring.
Asset Tracking
The SIM868 fits asset tracking because it integrates a quad-band GSM/GPRS engine (85.6 kbps up/down) and a multi-constellation GNSS receiver (GPS/GLONASS/BDS) in one 17.6 x 15.7 mm module, eliminating a separate positioning device and reducing BOM cost. In a typical tracker, the host MCU receives NMEA position data from the GNSS section and reports via GPRS using TCP/MQTT over the AT-command UART. The 650 uA idle current supports battery or supercapacitor-backed operation, and dual SIM interfaces allow carrier failover for cross-border logistics fleets where a single operator loses coverage.
Được đề xuất
Vehicle Fleet Monitoring
For fleet telematics, the SIM868 provides global quad-band 850/900/1800/1900 MHz coverage, so one hardware design serves vehicles on multiple continents without regional variants. Its -40C to +85C operating range covers under-dash and engine-bay-adjacent mounting. The module reports position over GPRS while the GNSS receiver, with GPS/GLONASS/BDS multi-constellation reception, maintains fixes in urban canyons where GPS-only receivers drift. Designers should supply a 3.4-4.4 V rail with low impedance to absorb GSM transmit burst currents drawn from the vehicle battery via a buck regulator, and use the USB 2.0 interface for diagnostics during commissioning.
Được đề xuất
Anti-Theft Security Systems
The SIM868 suits anti-theft and alarm reporting systems because it can send SMS alerts and GPRS event messages over the quad-band 2G network and simultaneously deliver GNSS coordinates for stolen-asset recovery. The dual SIM card interface is valuable in security applications: if an intruder jams or disables one carrier, the second SIM on a different network maintains the alarm channel. The UART interface connects to a panel MCU with simple AT-command handling, while GPIO lines can drive status indicators. GSM SMS delivery uses the control channel, so alerts can be sent even when GPRS data service is congested.
Được đề xuất
M2M IoT Telemetry Devices
For general M2M telemetry - smart meters, vending machines, environmental stations - the SIM868 offers the abundant extension interfaces SIMCom highlights: UART, USB 2.0, I2C, GPIO, dual SIM, and SD card. The SD card interface enables local data logging when cellular coverage drops, with backfill upload once the link restores. GPRS at 85.6 kbps is sufficient for periodic sensor payloads and MQTT messaging, while 650 uA idle current keeps sleep-mode budgets realistic for mains-adjacent or large-battery installations. The LCC/LGA pad construction supports automated assembly and conformal coating for outdoor enclosures.
Được đề xuất
Portable and Battery-Powered Trackers
The SIM868's 650 uA idle current and compact 17.6 x 15.7 mm LCC/LGA footprint make it practical for portable, battery-powered locator devices such as personal trackers, pet trackers, and luggage tags. A power-management scheme that duty-cycles the GNSS receiver (fix, report, sleep) with the GPRS radio in idle between transmissions achieves multi-day runtimes from a single-cell lithium battery through a 3.4-4.4 V-capable boost converter. The -40C to +85C range covers outdoor exposure. Microcontroller sleep between events further reduces average draw, waking the SIM868 via its UART only when position data must be uploaded.
Được đề xuất
Industrial Remote Monitoring
In industrial monitoring - pump stations, cold-chain sensors, generator sets - the SIM868 provides an economical connectivity layer where Ethernet is unavailable. The I2C interface can attach auxiliary sensors or an EEPROM for configuration storage, while the UART links to the plant controller. Operating from 3.4-4.4 V and -40C to +85C, the module tolerates cabinet temperature swings, and RoHS compliance simplifies placement in EU-market equipment. Because 2G network availability is declining in some regions, industrial designers should verify local 2G coverage commitments and consider dual-SIM configurations to hedge operator network shutdowns over the equipment's service life.
Được đề xuất
Tóm tắt các sản phẩm được đề xuất
Dữ liệu tham khảo kỹ thuật cho SIM868 — so sánh, hướng dẫn thiết kế và thông tin tuân thủ.
Hướng dẫn chọn lựa
So sánh với các sản phẩm thay thế
| Tham số | Sản phẩm này | SIM808 | SIM800C |
|---|---|---|---|
| Package | LCC/LGA SMD, 17.6 x 15.7 mm | LCC/LGA SMD (larger footprint) | LCC/LGA SMD (same size class as SIM868) |
| Brand | SIMCom Wireless Solutions | SIMCom Wireless Solutions | SIMCom Wireless Solutions |
| Cellular Bands | 850/900/1800/1900 MHz quad-band | 850/900/1800/1900 MHz quad-band | 850/900/1800/1900 MHz quad-band |
| GPRS Data Rate | 85.6 kbps up/down | 85.6 kbps up/down | 85.6 kbps up/down |
| GNSS Support | GPS/GLONASS/BDS | GPS (GNSS integrated) | None (GSM/GPRS only) |
| SIM Interfaces | Dual SIM | Single SIM | Single SIM |
| Supply Voltage | 3.4 V to 4.4 V | 3.4 V to 4.4 V | 3.4 V to 4.4 V |
| Pin-to-Pin Drop-In | - | No - different footprint, PCB rework required | No - same size class, GNSS pins absent; verify pad compatibility |
Bảo phân biệt quan trọng
- Dual SIM card interfaces (vsSIM808)
- Smaller, cheaper footprint with improved specs (vsSIM808)
- Integrated multi-constellation GNSS (vsSIM800C)
Ghi chú thiết kế
Estimated: GSM transmit bursts draw significant peak current above the 650 uA idle figure. Size the 3.4-4.4 V rail with low-ESR bulk capacitance (typ. 100 uF class plus 100 nF ceramics) close to the VBAT pins and verify peak burst current against the SIMCom Hardware Design guide before finalizing the regulator, since voltage sag during a transmit slot can cause module reset.
Keep the cellular and GNSS antennas physically separated with a ground guard between feed points to reduce desense - GNSS signals at -130 dBm are easily blocked by GSM transmit leakage. Follow the SIMCom Hardware Design reference layout for the 17.6 x 15.7 mm LCC/LGA land pattern and provide the recommended antenna keep-out zones on all layers.
The SIM868 is a 2G-only device. Several carriers have scheduled 2G network shutdowns; before committing to production, confirm long-term GSM/GPRS coverage in your deployment regions and consider the dual-SIM interfaces as coverage insurance. Also note the SIM808 EoL context for SIMCom 2G modules - secure buffer stock for extended product lifecycles.
Thông tin tuân thủ
RoHS compliant per JLCPCB/LCSC part data. REACH, halogen-free and conflict-minerals declarations not present in retrieved data - request certificates from SIMCom.
