SIM800C - Quad-Band GSM/GPRS Module | SIMCom | IoT & M2M
MPN： SIM800C ⚠ 最後購買機會SIM800C 概覽
A GSM/GPRS module is a self-contained cellular communication device that integrates a baseband processor, RF transceiver, and power management into a single package. It connects to a microcontroller via serial interfaces (typically UART) and communicates using AT commands. The SIM800C sits within the hierarchy: GSM/GPRS module -> cellular module -> wireless communication module -> IoT connectivity component. This modular approach simplifies adding cellular connectivity to embedded systems without requiring deep RF design expertise.
Key features of the SIM800C include support for Quad-Band GSM/GPRS (850/900/1800/1900 MHz), GPRS class 12 (up to 85.6 kbps), and a wide operating voltage range of 3.4V to 4.4V. It integrates an audio codec and amplifiers for voice applications, and offers low power consumption in sleep mode (around 1 mA), which is critical for battery-powered IoT devices. The module also supports a variety of network protocols including TCP/IP, UDP, HTTP, and FTP via AT commands, enabling direct internet connectivity.
Technically, the SIM800C uses a LCC package with 42 pins, providing excellent thermal and electrical performance. It includes a power management unit that handles over-voltage and under-voltage protection, and supports both normal and abnormal power-off procedures via the PWRKEY pin or AT command AT+CPOWD=1. The module is designed for easy integration with a minimal external component count, requiring only a power supply, SIM card holder, antenna, and a few passive components.
Typical applications include remote monitoring and control systems, vehicle tracking devices, smart meters, alarm systems, and portable IoT devices. Its compact size and low power consumption make it suitable for battery-operated devices that need periodic data transmission. The SIM800C is also widely used in development boards and prototyping platforms.
When designing with the SIM800C, ensure a stable power supply capable of handling current peaks up to 2A during GSM transmission bursts. Proper PCB layout with adequate grounding and decoupling is essential to maintain RF performance and minimize noise. Also, consider the module's lifecycle status, as it is being phased out in favor of 4G/LTE modules; for new designs, evaluate alternatives like the SIMCom A7683E or SIM7080G.
直接替換替代品，適用於 SIM800C — 相同封裝，腳位對腳位相容。需重新設計 PCB 的不同封裝零件不列入。
A7683E
✅ 直接替換📋 參考替代品（不在目錄中）
SIM7080G
✅ 直接替換📋 參考替代品（不在目錄中）
SIM800L
⚡ 相同封裝📋 參考替代品（不在目錄中）
SIM800H
⚡ 相同封裝📋 參考替代品（不在目錄中）
A7670C
⚡ 相同封裝📋 參考替代品（不在目錄中）
SIM7600
⚡ 相同封裝📋 參考替代品（不在目錄中）
SIM800C 規格（製造商公布）
| Technology | GSM/GPRS |
| Frequency Bands | 850/900/1800/1900 MHz |
| GPRS Data Rate | 85.6 kbps (Class 12) |
| Supply Voltage Range | 3.4 V to 4.4 V |
| Package Type | LCC (42-pin SMD) |
| Dimensions | 17.6 x 15.7 x 2.3 mm |
| Interfaces | UART, USB 2.0, GPIO, Audio |
| Audio Codec | Integrated with speaker/mic amplifier |
| Sleep Mode Current | ~1 mA |
| Peak Current (Transmit) | 2 A (typical) |
| 工作溫度 | -40°C to +85°C |
| RoHS 狀態 | Compliant |
| Network Protocols | TCP/IP, UDP, HTTP, FTP |
| Power Off Methods | PWRKEY pin or AT+CPOWD=1 |
| 安裝類型 | Surface Mount |
SIM800C 腳位配置
| 腳位 1 | VBAT — Power supply input (3.4-4.4V) |
| 腳位 2 | GND — Ground |
| 腳位 3 | PWRKEY — Power on/off key |
| 腳位 4 | UART_TXD — UART transmit |
| 腳位 5 | UART_RXD — UART receive |
| 腳位 6 | USB_DP — USB data plus |
| 腳位 7 | USB_DM — USB data minus |
| 腳位 8 | MIC_P — Microphone positive |
| 腳位 9 | MIC_N — Microphone negative |
| 腳位 10 | SPK_P — Speaker positive |
| 腳位 11 | SPK_N — Speaker negative |
| 腳位 12 | GPIO1 — General purpose I/O |
功率與熱特性
| 功率輸入 | 3.4 V to 4.4 V |
| 操作溫度 | -40°C to +85°C |
SIM800C 由製造商公布的功率輸入與熱參數。
典型應用
SIM800C 適用於 6 應用s: IoT Remote Monitoring, Vehicle Tracking System, Smart Metering, Alarm and Security Systems, Portable IoT Devices, Industrial Automation.
IoT Remote Monitoring
The SIM800C is ideal for IoT remote monitoring systems that require periodic data transmission over GSM/GPRS networks. Its low sleep current (~1 mA) and support for TCP/IP, UDP, HTTP, and FTP protocols enable efficient communication with cloud servers. The module's compact LCC package (17.6x15.7x2.3 mm) fits into small enclosures, and its wide operating voltage (3.4-4.4V) allows direct battery operation. For example, in agricultural soil moisture monitoring, the SIM800C can send sensor data every hour, consuming minimal power between transmissions. The UART interface simplifies connection to microcontrollers like STM32 or Arduino. However, designers must account for 2A current peaks during transmission, requiring a robust power supply with adequate decoupling capacitors.
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Vehicle Tracking System
In vehicle tracking, the SIM800C provides reliable GSM/GPRS connectivity for transmitting GPS coordinates to a central server. Its Quad-Band support (850/900/1800/1900 MHz) ensures global compatibility, and the integrated audio codec allows for hands-free calling features. The module's small size enables integration into compact tracking devices. The UART interface connects to a GPS receiver, and the module can send location data via TCP/IP. Power consumption is a concern; during active transmission, current can spike to 2A, so a power management IC is recommended. The SIM800C's support for AT commands simplifies firmware development. For new designs, consider the A7683E for 4G LTE Cat1 connectivity, as 2G networks are being phased out in many regions.
推薦
Smart Metering
The SIM800C is well-suited for smart metering applications, such as electricity, water, or gas meters, where periodic data reporting is required. Its low sleep current (~1 mA) is ideal for battery-powered meters that transmit readings daily. The module supports GPRS data transfer up to 85.6 kbps, sufficient for meter data. The UART interface allows easy connection to metering ICs. The module's wide voltage range (3.4-4.4V) accommodates battery voltage variations. However, the 2A peak current during transmission must be handled with a supercapacitor or battery with high discharge capability. The SIM800C's support for TCP/IP enables direct connection to utility servers. For long-term deployments, consider the SIM7080G for LTE-M/NB-IoT, which offers better coverage and lower power consumption.
推薦
Alarm and Security Systems
The SIM800C is commonly used in alarm systems to send SMS alerts or make voice calls during security events. Its integrated audio codec and speaker/mic amplifier enable two-way voice communication, allowing users to listen in on premises. The module's Quad-Band support ensures reliable connectivity. The UART interface connects to a security controller, and AT commands are used to send SMS messages. The module's low sleep current is beneficial for battery backup systems. However, the 2A peak current during transmission requires a robust power supply. The SIM800C's small size allows integration into compact alarm panels. For new installations, consider the A7683E for 4G LTE Cat1, as 2G networks are being decommissioned.
推薦
Portable IoT Devices
The SIM800C is ideal for portable IoT devices like personal trackers, health monitors, and smart wearables that require cellular connectivity. Its compact LCC package (17.6x15.7x2.3 mm) and low sleep current (~1 mA) make it suitable for battery-powered devices. The module supports voice, SMS, and data, enabling features like emergency calling. The UART interface connects to a host MCU, and the module's support for TCP/IP allows direct cloud connectivity. Power management is critical; the 2A peak current during transmission must be handled with a battery and power management IC. The SIM800C's wide voltage range (3.4-4.4V) is compatible with Li-ion batteries. For new designs, consider the SIM7080G for LTE-M/NB-IoT, which offers lower power consumption and better coverage.
推薦
Industrial Automation
In industrial automation, the SIM800C provides remote monitoring and control capabilities over GSM/GPRS networks. It can be used in PLCs, remote terminal units (RTUs), and industrial gateways to transmit status data and receive commands. The module's robust design supports operating temperatures from -40°C to +85°C, suitable for harsh environments. The UART interface connects to industrial controllers, and the module supports TCP/IP for M2M communication. The 2A peak current during transmission requires a stable power supply, often provided by industrial power converters. The SIM800C's small size allows integration into DIN-rail modules. For new industrial designs, consider the A7683E for 4G LTE Cat1, as 2G networks are being phased out.
推薦
推薦產品摘要
工程參考資料，適用於 SIM800C — 比較、設計指引及合規資訊。
選型指南
與替代品比較
| 參數 | 本產品 | A7683E | SIM7080G | SIM800L |
|---|---|---|---|---|
| Package | LCC (42-pin) | LCC (42-pin) | LCC (42-pin) | LGA (42-pin) |
| Brand | SIMCom | SIMCom | SIMCom | SIMCom |
| Technology | GSM/GPRS | LTE Cat1 | LTE Cat-M/NB-IoT | GSM/GPRS |
| Frequency Bands | 850/900/1800/1900 MHz | LTE bands (varies) | LTE Cat-M/NB-IoT bands | 850/900/1800/1900 MHz |
| Data Rate | 85.6 kbps (GPRS) | 10 Mbps (LTE Cat1) | 1 Mbps (Cat-M) | 85.6 kbps (GPRS) |
| Audio Codec | Yes | Yes | No | No |
| Supply Voltage | 3.4-4.4V | 3.4-4.2V | 3.4-4.2V | 3.4-4.4V |
| Sleep Current | ~1 mA | ~1 mA | ~0.1 mA | ~1 mA |
主要差異化特點
- Integrated audio codec and amplifiers (對比SIM800L)
- Pin-compatible with newer LTE modules (對比A7683E)
- Compact LCC package (對比SIM800H)
設計說明
The SIM800C requires a stable power supply capable of delivering up to 2A during GSM transmission bursts. Use a low-dropout regulator or a DC-DC converter with sufficient current rating, and place a 100uF and 10uF ceramic capacitor close to the VBAT pin to handle transient currents. A supercapacitor or battery with high discharge rate may be needed for battery-powered designs.
For optimal RF performance, follow the layout guidelines in the SIM800C hardware design guide. Keep the antenna connector and RF trace away from digital signals and power lines. Use a 50-ohm impedance-controlled trace for the antenna, and ensure a solid ground plane under the module. Place the SIM card holder close to the module to minimize trace length.
Ensure the PWRKEY pin is pulled low for at least 1 second to power on the module. Do not apply voltage to the UART pins before the module is powered, as this can cause latch-up. Also, avoid exceeding the absolute maximum ratings on any pin. For power-off, use the PWRKEY pin or AT+CPOWD=1 command to ensure proper shutdown.
合規資訊
RoHS compliance is indicated on SIMCom's product page. Other compliance details are not specified in the provided data.
