The E73-2G4M04S1B is an industrial-grade nRF52832 SoC module supporting BLE 5.0/4.2, featuring a built-in 32.768kHz RTC crystal and ultra-low power consumption (2.5mW), designed for high-precision wireless development in a compact 17.5*28.7mm SMD package.
| Parameter | Technical Specification |
|---|---|
| Model Number | E73-2G4M04S1B |
| Core Chip (IC) | Nordic nRF52832 |
| Protocol Support | BLE 4.2 / BLE 5.0 |
| Frequency Range | 2.379 ~ 2.496 GHz |
| Supply Voltage | 1.8V - 3.6V DC |
| Output Power | 4dBm (Max) |
| Communication Distance | 0.1km (100m) |
| Dissipation Power | 2.5mW |
| External Crystal | Built-in 32.768kHz RTC Crystal |
| Operating Temperature | -40 ~ +85 ℃ |
| Interface & Type | SoC / Wireless SoC Module |
| Dimensions & Weight | 17.5 * 28.7 mm | 1.8±0.1g |
| Package & Brand | SMD / EBYTE |
Download Manual
Manual
PCB
Ebyte Company Profile
【CE Certification】E73-CE
【TELEC Certification】E73-Telec
【FCC Certification】E73-FCC
Key Parameter
| RF Parameter | Value | Remark |
|---|---|---|
| Working frequency | 2379~2496 MHz | Default: 2.4GHz (32MHz oscillator) |
| Transmitting power | 4 dBm | About 2.5mW |
| Receiving sensitivity | -95 dBm | Air data rate: 1Mbps |
| Air data rate | 1M bps, 2M bps | Default: 1M bps |
| Test distance | 100m | In open and clear air, with maximum power, 5 dBi antenna gain, height of 2m, air data rate: 1M bps |
| Hardware Parameter | Value | Remark |
|---|---|---|
| IC | nRF52832-QFAA/QFN48 | - |
| FLASH | 512 KB | - |
| RAM | 64 KB | - |
| Core | ARM® Cortex™ -M4F | - |
| Size | 17.5 * 28.7 mm | - |
| Antenna type | PCB | - |
| Communication interface | I/O | - |
| Package | SMD | - |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
|---|---|---|---|---|---|
| Power supply | 1.8 | 3.3 | 3.6 | V | - |
| Communication level | 1.8 | 3.3 | 3.6 | V | - |
| Transmitting current | 13 | 14 | 15 | mA | 4dBm（2.5mW） |
| Receiving current | 4 | 5 | 6 | mA | - |
| Sleep current | 1 | 2 | 3 | μA | - |
| Operating temperature | -40 | 20 | +85 | ℃ | - |
| Operating humidity | 10 | 60 | 90 | % | - |
| Storage temperature | -40 | 20 | +125 | ℃ | - |
Application
-
Industrial Sensor Networks: Leveraging the nRF52832's powerful ARM Cortex-M4F processor and the module's -40 to +85°C industrial-grade temperature tolerance, this module solves the problem of local data pre-processing in harsh factory environments where latency-sensitive automation is critical.
-
Medical Grade Wearables: With a peak dissipation power of only 2.5mW and the integrated 32.768kHz crystal for ultra-low-power sleep modes, the E73-2G4M04S1B is ideal for continuous physiological monitoring devices that require long battery life and high clock accuracy for data timestamping.
-
Smart Building Control: The 100m stable transmission range and BLE Mesh compatibility allow integrators to deploy large-scale lighting and climate control grids. The module's maximized RF characteristics ensure signal stability even in environments with significant 2.4GHz multipath interference.
FAQ
Q: How does the built-in 32.768kHz crystal oscillator affect the power consumption of the E73-2G4M04S1B?
A: The integrated low-frequency crystal oscillator is critical for high-precision timing during the module's deep sleep phases (System ON/OFF modes). By using an internal 32.768kHz RTC, the nRF52832 can maintain accurate BLE connection intervals while keeping the high-frequency 32MHz clock disabled, significantly reducing the average standby current to the microampere level compared to modules relying on internal RC oscillators which suffer from temperature drift.
Q: What are the impedance matching considerations when designing the PCB carrier for this SMD module?
A: The E73-2G4M04S1B has already optimized its internal RF path to 50 ohms. However, when integrating the module onto a motherboard, engineers must maintain a 50-ohm characteristic impedance for any microstrip lines leading to an external antenna. Avoid placing copper planes or high-speed digital signal traces directly beneath the module's RF keep-out area to minimize parasitic capacitance and signal attenuation.
Q: Can the E73-2G4M04S1B operate using the internal DC-DC converter of the nRF52832?
A: Yes, the module hardware supports the nRF52832's internal DC-DC regulator mode. When enabled via software, this significantly improves power efficiency during radio active states (TX/RX) compared to the LDO mode. To ensure stability, the supply voltage must remain within the 1.8V to 3.6V range with sufficient decoupling capacitance to handle the fast transient switching currents of the DC-DC converter.
