| Technical Parameter | E220-400M33S Specifications |
|---|---|
| Core RF Chipset | Semtech LLCC68 (New generation LoRa spread spectrum technology) |
| Operating Frequency Band | 410.125 to 493.125 MHz (Supports standard 433MHz and 470MHz bands) |
| Maximum Transmit Power | 33 dBm (Approximately 2.0W peak output power) |
| Reference Communication Range | 16000 meters (16 km in open, clear outdoor environment with optimal antenna) |
| Communication Interface | SPI (Allows direct register level control) |
| Active Components Integrated | Built-in high-gain Power Amplifier (PA) and Low Noise Amplifier (LNA) |
| Crystal Oscillator Type | Industrial-grade high-precision 32MHz crystal oscillator |
| Operating Voltage Supply | 3.3 to 5.5 Volts DC (Note: Voltage below 5.0V may limit peak transmit power) |
| Package Form Factor | SMT / SMD (Surface Mount Device) |
| Physical Dimensions | 22 * 38.5 mm |
| Operating Temperature Range | Minus 40 to plus 85 degrees Celsius |
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| Main parameters | performance | Remark | |
| minimum value | maximum value | ||
| Supply voltage (V) | 0 | 5.5 | Exceeding 5.5V will permanently burn the module |
| Blocking power (dBm) | - | 10 | Less likely to be burned if used at close range |
| Working temperature (℃) | -40 | 85 | Industrial grade |
| Main parameters | performance | Remark | |||
| minimum value | Typical value | maximum value | |||
| Working voltage (V) | 3 | 5 | 5.5 | ≥5V guaranteed output power | |
| Communication level (V) | - | 3.3 | - | Using 5V TTL risks burning out | |
| Working temperature (℃) | -40 | - | 85 | Industrial grade design | |
| Working frequency band (MHz) | 410 | 433/470 | 493 | Support ISM frequency band | |
| Power consumption | Emission current (mA) | - | 1200 | - | Instantaneous power consumption |
| Receive current (mA) | - | 12.5 | - | ||
| Sleep current (μA) | - | 1 | - | Software shutdown | |
| Maximum transmit power (dBm) | 32.5 | 33 | 33.5 | ||
| Receiving sensitivity (dBm) | - | -129 | - | -124dbm,BW_L=125kHz,SF = 7,LORA TM ; -129dbm,BW_L=125kHz,SF = 9,LORA TM ; -121dbm,BW_L=250kHz,SF = 7,LORA TM ; -129dbm,BW_L=250kHz,SF = 10,LORA TM ; -117dbm,BW_L=500kHz,SF = 7,LORA TM ; -127dbm,BW_L=500kHz,SF = 11,LORA TM ; |
|
| Communication speed rate | GFSK（bps） | 0.6k | -121dbm,BW_L=250kHz,SF = 7,LORA TM ; | 300k | User programmable customization |
| LoRa（bps） | 1.76k | -121dbm,BW_L=250kHz,SF = 7,LORA TM ; | 62.5k | User programmable customization | |
| Main parameters | describe | Remark |
| Measured distance | 16km | Sunny and open space, antenna gain 3.5dBi, antenna height 2.5 meters, air rate 2.4kbps |
| FIFO | 256Byte | Maximum length of a single send |
| Crystal frequency | 32MHz | Passive crystal oscillator, recommended 24pF |
| Modulation method | LORA | It is recommended to use LORA modulation method |
| Packaging method | SMD type | -121dbm,BW_L=250kHz,SF = 7,LORA TM ; |
| Interface mode | 2.54mm | stamp hole |
| Communication interface | SPI | 0~10Mbps |
| Overall dimensions | 38.5*24mm | -121dbm,BW_L=250kHz,SF = 7,LORA TM ; |
| RF interface | Stamp hole/IPEX | Equivalent impedance is about 50Ω |
| weight | 5.85g | -121dbm,BW_L=250kHz,SF = 7,LORA TM ; |
Practical Application Scenarios
1. Smart Grid and High-Voltage Power Line Fault Telemetry
In high-voltage electrical grids, substation switches and overhead line fault indicators require ultra-reliable data telemetry under heavy electromagnetic interference (EMI). The E220-400M33S operating at Sub-GHz 433MHz provides excellent wave diffraction around metal distribution cabinets. When connected to host RTUs, its built-in LNA ensures weak signal capture, allowing critical grid fault data to bypass noisy industrial environments and reach control gateways over distances up to 16km.
2. Large-Scale Agricultural Irrigation and Water Valve Control
Deploying a wireless sensor network across thousands of acres of orchards or rice fields requires immense power and range to overcome foliage absorption. The E220-400M33S module acts as the core transceiver on remote valve controllers and soil stations, interfacing with low-power MCUs via SPI. Leveraging the 33dBm (2W) output of its integrated PA, it ensures commands from the central irrigation hub penetrate dense agricultural canopies.
3. Remote Oil and Gas Pipeline Infrastructure Inspection
Oil and gas extraction wells and pipeline monitoring systems are often located in remote deserts or mountainous terrains where cellular infrastructure is completely absent. Integrating this LoRa module into outdoor RTUs or EBYTE wireless DTUs allows operators to establish a self-organizing, long-range private telemetry network. The industrial-grade 32MHz crystal oscillator prevents frequency drift caused by extreme desert temperature fluctuations, ensuring uninterrupted operations.
FAQ Section
1. Why does the E220-400M33S achieve a longer range than standard LLCC68 modules?
The native Semtech LLCC68 chip is limited to a maximum transmit power of 22dBm. The E220-400M33S overcomes this hardware limitation by integrating an onboard high-efficiency Power Amplifier (PA) to boost maximum transmit power to 33dBm (2W). Simultaneously, it integrates a Low Noise Amplifier (LNA) to significantly improve the receiving sensitivity, creating a superior link budget that extends the reference communication range to 16km.
2. What are the critical power supply requirements for this 2W high-power module?
Because the module delivers 33dBm (2W) of RF power, the peak current during transmission can exceed 1A. It is critical to provide a highly stable DC power supply between 3.3 and 5.5 Volts (with 5.0 Volts strongly recommended for maximum power output) capable of delivering a minimum peak current of 1.5A. Additionally, developers should place high-value tantalum and ceramic decoupling capacitors (e.g., 100 microfarads plus 100 nanofarads) as close as possible to the module VCC pin to prevent voltage drops during transmission.
3. How does the SPI interface benefit advanced embedded system developers?
Unlike UART modules that run on fixed, pre-programmed firmware, the E220-400M33S utilizes an SPI interface. This provides developers with direct, register-level access to the internal Semtech LLCC68 transceiver. This architecture allows embedded engineers to configure custom packet structures, adjust bandwidth, spreading factors, and coding rates dynamically, and optimize overall system latency and power consumption for advanced custom network protocols.
4. Why is the 32MHz crystal oscillator component critical for industrial deployments?
The E220-400M33S is equipped with an industrial-grade high-precision 32MHz crystal oscillator. Standard low-cost crystal oscillators suffer from significant frequency drift when exposed to outdoor environments. This high-precision component guarantees frequency stability across extreme temperatures ranging from minus 40 to plus 85 degrees Celsius, preventing communication failures caused by frequency mismatch between remote nodes and gateways.
