[IC]:-
[Frequency]:425~450.5MHz
[Power]:3~13dBm
[Distance]:1.0km
[Interface]:UART
[Introduction]:E40-T20S2 is a 20mw wireless transceiver module,operates at 425-440.75MHz,SMD package,Which is convenient for intergration Module adopts super error correction code,Which is greatly improved the anti-interference performance and sensitivity.
| RF Parameter | Value | Remark |
| Working frequency | 425~450.5 MHz | Default: 433MHz |
| Transmitting power | 3~13 dBm | Default: 13dBm（About 20mW） |
| Receiving sensitivity | -111 dBm | Air data rate: 1.2kbps |
| Air data rate | 1.2k~19.2kbps | Default: 1.2kbps |
| Test distance | 1000m | In open and clear air, with maximum power, 5dBi antenna gain, height of 2m, air data rate: 1.2kbps |
| Hardware Parameter | Value | Remark |
Size | 17 * 30 mm | |
Antenna type | IPEX/external/spring | |
Communication interface | UART | Baud rate: 1200~115200, default: 9600 |
Package | SMD | |
Buffer | 256 bytes buffer | Automatically sub-packaging with 39 bytes per package |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
| Power supply | 2.3 | 5.0 | 5.2 | V | |
| Communication level | 2.5 | 3.3 | 3.6 | V | |
| Transmitting current | 26 | 30 | 34 | mA | 13dBm（20mW） |
| Receiving current | 11 | 12 | 13 | mA | |
| Sleep current | 3 | 4 | 5 | μA | |
| Operating temperature | -40 | 20 | +85 | ℃ | |
| Operating humidity | 10 | 60 | 90 | % | |
| Storage temperature | -40 | 20 | +125 | ℃ |
| Pin No. | Pin Item | Pin Direction | Pin Application |
| 1 | M0 | Input （weak pull-up） | Work with M1 & decide the four operating modes. (Floating is not allowed, can be ground) |
| 2 | M1 | Input （weak pull-up） | Work with M0 & decide the four operating modes. (Floating is not allowed, can be ground) |
| 3 | RXD | Input | TTL UART inputs, connects to external (MCU, PC) TXD output pin. Can be configured as open-drain or pull-up input. |
| 4 | TXD | Output | TTL UART outputs, connects to external RXD (MCU,PC) input pin. Can be configured as open-drain or push-pull output |
| 5 | AUX | Output | To indicate module's working status & wakes up the external MCU. During the procedure of self-check initialization, the pin outputs low level. Can be configured as open-drain output or push-pull output. (Floating is allowed) |
| 6 | VCC | Input | Power supply 2.1V~5.5V DC |
| 7 | GND | Input | Ground electrode |
| 8 | ANT | Output | Reference places of high frequency signal output |
| 9 | GND | Input/Output | Antenna interface（ high frequencysignal output） |
| 10 | GND | Input | Ground electrode |
| 11 | GND | Input | Ground electrode |
| 产品 型号 | IC | Interface | Frequency Hz | Power dBm | Distance km | Air data rate | Package | Size (mm) | Feature | 技术 手册 | 样品 购买 |
|---|---|---|---|---|---|---|---|---|---|---|---|
| E40-T20S2 | UART | - | 433M | 13 | 1.0 | 1.2k~19.2k | SMD | 17*30 | Low cost , FEC |
