Limit Parameters
| Main Parameters | Value | Remarks | |
| Min. | Max | ||
| Power supply（V） | 0 | 5.5 | Voltage over 5.5V will cause permanentdamage to module |
| Blocking power（dBm） | - | 10 | Chances of burn is slim when modulesare used in short distance |
| Operating temperature（℃） | -40 | +85 | - |
Operating parameter
| Main Parameters | Value | Remarks | ||
| Min. | Typical | Max | ||
| Operating voltage（V） | 2.3 | 5.0 | 5.5 | - |
| Communication level（V） | - | 3.3 | - | For 5V TTL, it may be at risk of burning down |
| Operating temperature（℃） | -40 | - | 80 | Industrial design |
| Operating frequency（MHz） | 410 | 433 | 510 | Support ISM band |
| TX Current(mA) | - | 91 | - | Instant power consumption |
| RX current（mA） | - | 12 | - | - |
| Sleep current（μA） | - | 0.7 | - | Software is shut down |
| Max Tx power（dBm） | - | - | 20.0 | - |
| Receiving sensitivity（dBm） | -116 | -118 | -119 | Air data rate is1.2kbps |
| Air data rate（bps） | 1.2k | 2.4k | 200k | Controlled via user’s programming |
| Main parameter | Description | Remarks |
| Distance for reference | 2.5km | Test condition：clear and open area, antenna gain:5dBi,antenna height:2.5m，air data rate:1.2kbps |
| FIFO | 54 Byte | Maximum capacity of single transmission |
| Cache capacity | 500 Byte | - |
| Modulation | GFSK | - |
| Communication interface | UART serial port | - |
| Package | SMD | - |
| Connector | 1.27mm | - |
| Size | 26*16mm | - |
| Antenna | IPEX/Stamp hole | 50 ohm impedance |
| No. | Name | Direction | Function |
| 1 | GND | - | Module ground wire |
| 2 | GND | - | Module ground wire |
| 3 | GND | - | Module ground wire |
| 4 | GND | - | Module ground wire |
| 5 | M0 | Input （pull up whenit’s weak） | Cooperate with M1 to determine 4 operating modes of the module(can be liftedfloating, the module contains pull-up resistor） |
| 6 | M1 | Input （pull up whenit’s weak） | Cooperate with M0 to determine 4 operating modes of the module(can be liftedfloating, the module contains pull-up resistor） |
| 7 | RXD | Input | TTL serial input, connect to external TXD output pin; |
| 8 | TXD | Output | TTL serial input, connect to external RXD output pin; |
| 9 | AUX | Output | Used to indicate the working status of the module; the user wakes up the externalMCU and outputs a low level during the power-on self-test initialization |
| 10 | VCC | - | Module power supply positive reference, voltage range: 2.6V ~ 5.5V DC |
| 11 | GND | - | Module ground wire |
| 12 | NC | - | - |
| 13 | GND | - | Module ground wire |
| 14 | NC | - | - |
| 15 | NC | - | - |
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| 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 |
