E220-900T22S is a new generation of LoRa wireless serial port module (UART), based on Semtech's original design. It has a variety of transmission methods, works in the (850.125～930.125MHz) frequency band (default 873.125MHz), LoRa spread spectrum technology, TTL level output, compatible with 3.3V and 5V IO port voltage.
[IC]：LLCC68
[Frequency]：850.125~930.125MHz
[Power]：22dBm
[Distance]：5km
[Size]：16*26mm
[Product weight]：2.2g±0.1g
| Parameter | Technical Specification |
|---|
| Main parameter | Performance | Remark |
|---|---|---|
| Operating frequency | 850.125~930.125MHz | Support ISM band |
| Tx power | 22 dBm | - |
| Receiving sensitivity | -129dbm | - |
| Air data rate | 2.4k~62.5kbps | Controlled via user’s programming |
| Distance for reference | 5km | Test condition：clear and open area, antenna gain: 5dBi，antenna height: 2.5m，air data rate: 2.4kbps |
| Main parameter | Performance | Remark |
|---|---|---|
| Size | 16 * 26 mm | - |
| Antenna | IPEX/stamp hole | 50 ohm impedance |
| Communication interface | UART | TTL Level |
| Package | SMD | - |
| Main parameter | Min. | Typ. | Max. | Unit | Remark |
|---|---|---|---|---|---|
| Operating voltage | 2.3 | 3.3 | 5.5 | V | ≥3.3 V ensures output power |
| Communication level | - | 3.3 | - | V | For 5V TTL, it may be at risk of burning down |
| TX current | - | 110 | - | mA | Instant power consumption @22dBm |
| RX current | - | 11 | - | mA | - |
| Sleep current | - | 2 | - | uA | Software is shut down |
| Operating temperature | -40 | 20 | +85 | ℃ | Industrial design |
Application
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Smart Utility Metering: The E220-900T22S utilizes its 22dBm signal penetration to overcome deep-indoor challenges in water and gas meter data collection. Its 5km range allows a single gateway to cover thousands of nodes in high-density residential areas, significantly reducing infrastructure costs.
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Industrial Sensor Integration: Featuring a dual-compatible TTL level design, this module solves the logic level mismatch pain point between legacy 5V PLCs and modern 3.3V microcontrollers. It enables seamless wireless data backhaul for vibration and temperature sensors in heavy industrial environments.
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Agricultural Environmental Monitoring: In expansive outdoor farmlands, the LoRa spread spectrum technology of the LLCC68 ensures stable communication despite light foliage and topographical obstacles. The 5km range facilitates wide-area telemetry for soil moisture and irrigation control systems.
FAQ
Q: How does the LLCC68 core in the E220-900T22S improve power efficiency compared to older LoRa generations?
A: The LLCC68 IC integrated into the E220-900T22S features a modern power management architecture. During 22dBm transmission, the peak current is optimized to approximately 110mA, which is significantly lower than previous spread spectrum solutions. This efficiency, combined with a 2uA sleep current, extends the battery life of remote sensor nodes in duty-cycled applications.
Q: What are the design requirements for antenna matching to maintain the 5km communication distance?
A: To achieve the rated 5km distance, the RF path must be designed with a 50-ohm characteristic impedance. Engineers should ensure that the IPEX or stamp hole antenna interface is connected via a low-loss microstrip line. Using an antenna with a VSWR less than 1.5 and a gain of 5dBi at the 868MHz or 915MHz center frequency is critical for maximizing the link budget.
Q: Can the E220-900T22S handle direct UART connection to 5V industrial microcontrollers without level shifters?
A: Yes, the module is hardware-engineered to be compatible with both 3.3V and 5V TTL logic levels. The internal I/O circuitry handles the voltage clamping and logic threshold detection, allowing IoT engineers to connect the module directly to 5V systems like traditional Arduino or industrial PLC serial ports without risk of CMOS gate damage.
