TLSR8266 Bluetooth BLE 4.2 UART SMD Transceiver E104BT05
The TLSR8266 Bluetooth BLE 4.2 UART SMD Transceiver E104BT05 from CDEBYTE is a compact, low-power wireless module designed for reliable 2.4 GHz BLE communications. With a 70-meter range in open space and a tiny 10 x 14.5 mm SMD package, this module is perfect for IoT sensors, beacons, and embedded controllers that require a discrete, high-performance BLE link. It features a UART interface for easy integration and a PCB antenna with 50 ohm impedance, delivering robust data transmission in industrial environments. Operating from 2.5–3.6V and able to withstand wide temperatures (-40°C to +85°C), the E104-BT05 is built for reliability in harsh conditions.
Benefits & Tips
- Easy integration: UART-based BLE 4.2 transceiver enables transparent data transmission between microcontrollers and Bluetooth devices, simplifying your wireless design.
- Low power, long reach: Designed for battery-powered applications with sleep current around 8 μA and a practical 70 m range in open space.
- Voltage and level awareness: Operates at 2.5–3.6 V with 3.3 V TTL logic recommended; avoid 5 V TTL to prevent damage and ensure reliable output power.
Product specifications
- Model: TLSR8266 BLE 4.2 UART SMD Transceiver E104-BT05
- Frequency: 2402–2480 MHz (ISM band)
- Max TX power: 8 dBm
- RX sensitivity: -92 dBm
- Range: 70 m (clear/open area, height 2.5 m)
- Size: 10 × 14.5 mm
- Antenna: PCB antenna, 50 Ω impedance
- Interface: UART
- Package: SMD
- Operating voltage: 2.5–3.6 V (≥3.3 V ensures output power)
- Logic level: 3.3 V TTL; 5 V TTL may risk damage
- TX/RX current: ~13 mA (typical)
- Sleep current: ~8 μA
- Operating temperature: -40°C to +85°C
Package Includes
- 1 x TLSR8266 BLE 4.2 UART SMD Transceiver E104-BT05 module
- 1 x User Manual (PDF)
Warnings / Reminders
- Use a supply within 2.5–3.6 V. For best performance, 3.3 V TTL levels are recommended.
- Do not drive UART signals with 5 V TTL, as this may damage the module.
- Ensure proper decoupling and a suitable 50 Ω environment to maintain signal integrity.
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| RF Parameter | Value | Remark |
| Operating frequency(MHz) | 2402~2480 MHz | ISM band |
| Max Tx power(dBm) | 8 dBm | - |
| Receiving sensitivity(dBm) | -92 dBm | - |
| Distance | 70m | Clear and open area, height: 2.5m |
| Hardware Parameter | Value | Remark |
| Size | 10 * 14.5 mm | - |
| Antenna | PCB antenna | 50 ohm impedance |
| Communication interface | UART | - |
| Package | SMD | - |
| Electronic parameter | Min | Typ | Max | Unit | Condition |
| Operating voltage(V) | 2.5 | 3.3 | 3.6 | V | ≥3.3V ensures output power |
| Communication level(V) | - | 3.3 | - | V | For 5V TTL,it maybe at risk of buring down |
| TX current(mA) | - | 13 | - | mA | - |
| RX current(mA) | - | 13 | - | mA | - |
| Sleep current(μA) | - | 8 | - | μA | - |
| Operating temperature(℃) | -40 | - | +85 | ℃ | Industrial Design |
Please note: All electronic and mechanical equipment, devices and machines sold to EU countries are CE certified and carry a two year warranty.