The Ebyte E22-400MM22S is an ultra-small 10x10mm SMD LoRa wireless transceiver module built on Semtech's next-generation SX1268 RF chip, operating within a 410MHz to 493MHz frequency band with a 22dBm transmit power to deliver long-range data telemetry up to 7km for space-constrained industrial IoT end nodes.
| Technical Parameter | Specification Details |
|---|---|
| Product Model | E22-400MM22S |
| Core RF Chip | Semtech SX1268 |
| Operating Frequency Band | 410 MHz to 493 MHz (Supports 433MHz and 470MHz) |
| Transmission Power | 22 dBm |
| Communication Distance | 7 km |
| Form Factor / Packaging | Ultra-small SMD (Surface Mount Device) |
| Product Size | 10 x 10 x 2.5 mm |
| Product Weight | 0.5g |
| mainly parameters | Performance | Notes | |||
| Min | Typical | Max | |||
| Power Supply Voltage（V） | 1.8 | 3.3 | 3.7 | ≥3.3V Can ensure the output power | |
| communication level（V） | - | 3.3 | - | Using 5V TTL may burn out | |
| Working temperature（°C） | -40 | - | 85 | Industrial grade design | |
| Working frequency band（GHz） | 410 | 433/470/490 | 493 | Support ISM Frequecy | |
| Power consumption |
Emission current（mA） | - | 100 | - | instantaneous power consumption |
| Receives the current（mA） | - | 6.5 | - | - | |
| Sleep current（μA） | - | 2 | - | software shut off | |
| Maximum transmitted power（dBm） | 21.4 | 21.5 | 22.3 | - | |
| Sensitivity of reception（dBm） | -144 | -146 | -147 | air rate is 0.3kbps | |
| air rate（bps） | 0.6k | - | 300k | User programming control | |
| 0.018k | 62.5k | User programming control | |||
| mainly parameters |
Description |
Notes |
| Distance | 7000m | Clear and open environment, antenna gain 5dBi, antenna height 2.5m, air speed 0.3kbps. |
| FIFO | 256 Byte | Maximum sending length |
| Crystal frequency |
32 MHz | - |
| Modulation method | LoRa(recommend) | - |
| Encapsulation way | SMD | - |
| Interface |
1.27mm | Stamp hole |
| Communication interface | SPI | 0-10Mbps |
| Overall dimensions | 10* 10*2.5 mm | - |
| Antenna interface | Stamp hole/IPEX |
The equivalent impedance is about 50 ohms |
| mainly parameters | Performance | Notes | |
| Min |
Max | ||
| Power Supply Voltage（V） | 0 | 3.7 | Permanently burn module over 3.7V |
| Blocking power（dBm） | - | 10 | At close range, the burn probability is low |
| Operating temperature（°C） | -40 | 85 | - |
| Product net weight | 0.5g士0.02g | Product net weight | |
Practical Application Scenarios
1. Remote Smart Agriculture and Crop Sensor Networks
In large-scale agricultural telemetry, environmental sensors must transmit soil moisture, temperature, and electrical conductivity metrics over vast outdoor fields. Operating on the sub-GHz 410-493MHz band, the E22-400MM22S leverages superior diffraction capabilities to easily bypass dense crop foliage and undulating terrain. Integrated alongside outdoor solar-harvesting power management units, it sends data back to a centralized Ebyte LoRa gateway over a 7km line-of-sight range.
2. High-Density Urban Smart Utility Metering (AMR)
For smart water, gas, and electricity grids, layout constraints demand ultra-compact embedded solutions. The miniature 10x10mm footprint of this SMD module enables utility meter manufacturers to integrate advanced LoRa communications directly onto congested utility meter motherboards. Its 433MHz/470MHz spectrum provides deep signal penetration through concrete walls, floors, and underground pits, ensuring reliable automated meter reading infrastructure.
3. Distributed Industrial Automation and Pipeline Telemetry
In heavy industrial plants, factories, and remote oil pipelines, tracking physical operational safety parameters requires robust wireless linkage. Boasting a solid 22dBm output power, the E22-400MM22S module counters severe electromagnetic interference and multi-path reflections caused by metallic heavy machinery. Hardware engineers use it to stream localized diagnostic frames securely from distant valves and tanks directly to central programmable logic controllers.
FAQ Section
1. What are the key performance benefits of the Semtech SX1268 chip inside the E22-400MM22S compared to older generations?
The Semtech SX1268 chip core provides substantially higher power efficiency, better anti-interference capabilities, and an extended link budget compared to legacy chips like the SX1278. This next-generation architecture lowers the active current consumption during transmission and reception while offering deep link budgets, allowing the E22-400MM22S to achieve a 7km range with a compact battery-friendly footprint.
2. Can the E22-400MM22S operate concurrently across both the 433MHz and 470MHz bands?
The module features a broad operational spectrum ranging from 410MHz to 493MHz. While it cannot listen to multiple separate frequencies simultaneously, it can be dynamically programmed via software registers to lock onto any specific channel within its range. This allows developers to utilize the exact same hardware module to comply with localized global ISM band regulations, such as 433MHz for European deployment or 470MHz for Asian markets.
3. How do the ultra-small 10x10mm dimensions impact the PCB layout design for embedded engineers?
The ultra-small 10x10x2.5mm SMD profile optimizes board space but demands careful RF engineering practices. Embedded developers must ensure a solid, continuous copper ground plane beneath the module on the host PCB to manage heat dissipation during 22dBm peak power transmissions. Additionally, keep any high-speed digital lines or switching power traces clear of the antenna feed line to prevent localized noise coupling.
