The E73 series comprises high-performance, multi-protocol BLE modules based on Nordic nRF52840 and nRF52833 SoCs, supporting Bluetooth 5.1, Mesh, Zigbee, and Thread in a compact 13x18mm SMD package for advanced IoT edge computing.
| Model | Core IC | Protocol Support | Memory (Flash/RAM) | Antenna | Tx Power |
|---|---|---|---|---|---|
| E73-2G4M08S1C | nRF52840 | BLE 5.0, Mesh, Zigbee, Thread | 1MB / 256KB | Ceramic | 8dBm |
| E73-2G4M08S1CX | nRF52840 | BLE 5.0, Mesh, Zigbee, Thread | 1MB / 256KB | IPEX | 8dBm |
| E73-2G4M08S1E | nRF52833 | BLE 5.1, Mesh, Zigbee, Thread | 512KB / 128KB | Ceramic | 8dBm |
| E73-2G4M08S1EX | nRF52833 | BLE 5.1, Mesh, Zigbee, Thread | 512KB / 128KB | IPEX | 8dBm |
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【CE Certification】E73-CE
【TELEC Certification】E73-Telec
【FCC Certification】E73-FCC
| RF Parameter | Value | Remark |
|---|---|---|
| Working frequency | 2360~2500 MHz | Default: 2.4GHz (32MHz oscillator) |
| Transmitting power | 8 dBm | About 2.5mW |
| Receiving sensitivity | -103dBm@BLE 125kbps（Long distance mode） -95dBm@BLE 1M bps |
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| Test distance | 120m | In open and clear air, with maximum power, 5 dBi antenna gain, height of 2m, 1M bps |
| Hardware Parameter | Value | Remark |
|---|---|---|
| IC | nRF52840-QIAAC0 / aQFN™ 73 | - |
| FLASH | 1024 KB | - |
| RAM | 256 KB | - |
| Core | ARM® Cortex™ -M4F | - |
| Size | 13.0 * 18.0 mm | - |
| Antenna type | Ceramic antenna | - |
| Communication interface | I/O | - |
| Package | SMD | - |
| Electronic parameter | Min. | Typ. | Max. | Unit | Condition |
|---|---|---|---|---|---|
| Power supply | 1.7 | 3.3 | 5.5 | V | - |
| Communication level | 0.7*VDD | - | VDD | V | - |
| Transmitting current | - | 17.05 12.68 7.25 7.63 |
- | mA | TX only run current (DC/DC, 3V) P(RF)= +8 dBm TX only run current (DC/DC, 3V) P(RF)= +4 dBm TX only run current (DC/DC, 5V, REG0 out= 3.3V) P(RF)= 0 dBm TX only run current(DC/DC, 3V) P(RF)= 0 dBm |
| Receiving current | - | 7.71 8.27 |
- | mA | RX only run current (DC/DC, 3V) 1M bps / 1M bps BLE RX only run current (DC/DC, 3V) 2M bps / 2M bps BLE |
| Operating temperature | -40 | 20 | +85 | ℃ | - |
| Operating humidity | 10 | 60 | 90 | % | - |
| Storage temperature | -40 | 20 | +125 | ℃ | - |
Application
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Smart Building Multi-Protocol Grid: The E73 series solves the interoperability pain point in smart buildings by supporting Bluetooth Mesh, Zigbee, and Thread simultaneously. Its 8dBm transmit power ensures stable concurrent connections across multi-floor lighting systems and HVAC controllers.
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Industrial Asset Tracking & Localization: Utilizing the Direction Finding (AoA/AoD) capabilities of the nRF52833 chip, the E73 series provides sub-meter indoor positioning accuracy. This addresses the high-latency issues of traditional GPS in warehouse environments, enabling real-time automated logistics.
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Medical Grade Wearable Monitoring: The ultra-low power consumption of the nRF52840 (down to 1.7V supply) combined with the integrated ARM Cortex-M4F core allows for complex on-device biosignal processing. This eliminates the need for frequent battery changes in continuous patient monitoring patches.
FAQ
Q: How does the E73 series internal DC/DC regulator impact peak current consumption compared to LDO mode?
A: When the internal DC/DC regulator is enabled for the nRF52840 core, the peak current during an 8dBm transmission at 3V VDD is reduced significantly to approximately 17mA, whereas LDO mode would maintain a higher linear current draw. This efficiency is critical for coin-cell applications where internal resistance limits high burst currents.
Q: What are the layout considerations for maintaining 50-ohm impedance matching for the IPEX variant?
A: For the E73-2G4M08S1CX and EX variants, the RF trace from the module pin to the IPEX connector is factory-tuned to 50 ohms. During PCB integration, a ground plane must be maintained directly beneath the RF keep-out area, and no high-speed digital lines should cross the RF signal path to prevent parasitic capacitance and signal distortion.
Q: Can the E73 series handle logic level translation for 5V industrial sensors?
A: No, the E73 series GPIO pins are not 5V tolerant. The maximum input voltage on any I/O pin is VDD + 0.3V, with VDD capped at 5.5V only for the VBUS pin. For standard GPIO communication with 5V industrial logic, external bidirectional level shifters or simple resistor dividers are required to prevent latch-up or permanent CMOS gate damage.
