[IC]：CMT2300A
[Frequency]：850~930MHz
[Power]：20dBm
[Distance]：3km
[Size]：20*14mm
[Introduction]：E49-900M20S Supports the maximum transmission power of 20dBm, users can set a lower output power , thus saving power consumption.The module works in the 850MHz ~ 930MHz frequency band, including the commonly used 868MHz and 915MHz frequency band.
| parameters | Description | Remark |
| Reference distance | 3kM | Test condition：clear and open area, antenna height: 2.5m，air data rate 2.4kbps |
| Crystal Oscillator | 26MHz | - |
| Package | SMD | - |
| Communication interface | SPI | - |
| Size | 20*14mm | - |
| Antenna | IPEX/stamp hole | 50 ohm impedance |
| Weight | 1.2±0.1g | - |
| parameters | Min. | Typ. | Max. | Unit | Remark |
| Power supply | 1.8 | 3.3 | 3.6 | V | Voltage over 3.6V will cause permanent damage to module |
| Communication level | - | 3.3 | - | V | For 5V TTL, it may be at risk of burning down |
| Operating temperature | -40 | - | +85 | ℃ | Industrial grade |
| Operating frequency | 850 | 868 | 930 | MHz | - |
| TX current | - | 75 | - | mA | @TX power 20dBm |
| RX current | - | 8.5 | - | mA | - |
| Sleep current | 300 | 300 | 300 | nA | - |
| Max TX power | - | 20 | - | dBm | - |
| Receiving sensitivity | -116 | -117 | -118 | dBm | @Air data rate is 1.2kbps |
| No. | Item | Direction | Description |
| 1 | GND | - | Ground |
| 2 | GND | - | Ground |
| 3 | GND | - | Ground |
| 4 | GND | - | Ground |
| 5 | GPIO1 | DI/O | Configurable multi-function IO port（see CMT2300A manual for details） |
| 6 | RXEN | DI/O | Configurable multi-function IO port（see CMT2300A manual for details） |
| 7 | TXEN | DI/O | Configurable multi-function IO port（see CMT2300A manual for details） |
| 8 | VCC | - | Power supply +3.3V |
| 9 | VCC | - | Ground |
| 10 | VCC | - | Ground |
| 11 | SCLK | DI | SPI clock pin |
| 12 | SDIO | DI/O | SPI data pin |
| 13 | CSB | DI | SPI register accesser |
| 14 | FCSB | DI | SPI FIFO accesser |
| 15 | GND | - | Ground |
| 16 | GND | - | Ground |
| 17 | ANT | - | RF module stamp hole interface，impedance 50Ω |
| 18 | GND | - | Ground |
| Order online |
| 【eBay】：https://www.ebay.com |
| 【Amazon】：https://www.amazon.co.uk |
| 【Aliexpress】：https://www.alibaba.com |
| 【Aliexpress】：https://www.aliexpress.com |
| For batch order/customized product |
| 【Sales hotline】：+86-28-61399028 Ext.812 |
| 【E-mail】：service@cdebyte.com |
| Technical support |
| 【Submit online】：http://www.ebyte.com/en/apple-technology.aspx |
| 【E-mail】：support@cdebyte.com |
| 产品 型号 | Interface | IC | Frequency | Power | Distance | Air data rate | Package | Size | Feature | 技术 手册 | 样品 购买 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| E49-900T20S | UART | - | 868M 915M | 20 | 2.5 | 1.2k~200k | SMD | 26 * 16 | Low power consumption | ||
| E49-900M20S | SPI | CMT2300A | 868M 915M | 20 | 3 | - | SMD | 20*14 | Low power consumption | ||
| E49-400M20S | SPI | - | 433M 470M | 20 | 2.5 | 0.5Kbps～300Kbps | SMD | 26 * 16 | Low power consumption, high cost performance | ||
| E49-400T20S | UART | - | 433M 470M | 20 | 2.5 | 1.2k~200k | SMD | 26 * 16 | Low power consumption, low cost solution | ||
| E49-400T20D | UART | - | 433M 470M | 20 | 2.5 | 1.2k~200k | DIP | 36*21 | Low power consumption, low cost solution |
