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The DL-OW3621-B
DreamLNK
The DL-OW3621-B
BLE 5.3+2.4G
The DL-OW3621-B
12dBm
1.7~3.6V
-99dBm
200m
8.64x14.19x2mm
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Dual-mode BLE 5.3 + 2.4G SoC Based Wireless Module with OW3621
Brief Introduction
The DL-OW3621-B is a compact low-power Bluetooth Wireless Module based on the OW3621 low-power Bluetooth chip (supports Bluetooth 5.3). The module features a built‑in AT command firmware and supports master‑slave integration mode. Users can perform scanning, connecting, broadcasting, and other operations via AT commands. In the connected state, the PHY, MTU, and connection parameters can be flexibly adjusted to better control throughput and power consumption.
The transport layer of the module supports both Server and Client transparent transmission modes, and offers auto‑connection as well as pre‑configurable connection parameters. An external MCU only needs a UART interface to complete Bluetooth configuration and transparent data transmission, greatly simplifying the BLE application development process.
· Operating frequency band: BLE 2.4 GHz
· Operating voltage: 1.7–3.8 V
· Maximum output transmit power: +11 dBm
· Supports serial data transparent transmission
· Receive current: 5.3 mA
· Operating voltage: 1.7–3.8 V (duplicate, but retained as given)
· Sleep current: < 0.7μA
· Sensitivity performance: Bluetooth® Low Energy (1Mbps @ –99dBm)
· AT commands for configuration and storage, facilitating development and debugging
· Supports transparent transmission mode for data transfer
· Supports master slave integration
· Scanning:
Scanning with specified parameters enables low power scanning
Scanning can display the device’s Bluetooth name
Automatic device connection based on Bluetooth address; after scanning, auto connection starts
· Advertising:
Supports changing Bluetooth name and factory name
Supports changing advertising interval and other parameters
Download Center
Datasheet of DL-OW3621-B Wireless Module V1.0 
Technical Parameter
Parameter | Min. | Typical | Max. | Unit | Remarks |
Operating Conditions | |||||
Working Voltage | 1.7 | 3.3 | 3.6 | V | To ensure maximum chip power, stable voltage should ≥ 3.0V |
Communication Level Range | -0.3 | 3.3 | 3.6 | V | Out range may damage the chip |
Working Temperature Range | -40 | 25 | 85 | ℃ | The larger the temperature difference, the greater the required bandwidth |
Current Consumption | |||||
Receiving Current | 7.5 | 8 | 8.5 | mA | |
TX Current | 40 | 41 | 45 | mA | ANT 50Ω, TX Power @ +12dBm |
18 | 19 | 21 | mA | ANT 50Ω, TX Power @ +5dBm | |
13 | 14 | 16 | mA | ANT 50Ω, TX Power @ +0dBm | |
Sleep Current | 1 | 1.5 | 2 | uA | @Register Storage |
RF Parameters | |||||
Frequency Range | 2360 | 2510 | MHz | ||
Transmitting Power | -50 | 11 | 12 | dBm | Software configurable |
Receiving Sensitivity | -99 | dBm | @ 1 Mbps | ||
Data Rate Supported | 1000 | 2000 | Kb/s | The lower the speed, the farther the distance | |
Pin’s Name | Type | Description |
ANT/NC | AI/AO | Analog antenna Input/output interface, 50Ω impedance, make it grounded, and add via holes |
GND | PWR | Reliable grounding |
IO23 | O | High level: FIFO not empty (transmitting/receiving data) – the module cannot receive serial data. Low level: Idle – the module can receive serial data. |
IO22 | O | Connection status indicator: low level = connected successfully, high level = not connected. |
IO19 | I | Mode control: high level = transparent transmission mode, low level = AT Command mode. |
3.3V | PWR | Stable voltage ≥3V is required to maximize chip performance. |
IO0 | IO | Programming pin TCK |
IO1 | IO | Programming pin TMS |
AT_RX | I | TTL serial input, connect to external TXD output pin |
AT_TX | O | TTL serial output, connect to external RXD input pin |
Other I/Os | IO | General I/O Ports, no function at present |
Product size:
DL-OW3621-B Value:The OW3621 chip employs a 48 MHz Cortex‑M0+ core, integrating 256KB of flash memory and 24KB of SRAM. The module is equipped with an external 24 MHz high‑speed crystal oscillator, and its RF performance has been optimized for harmonics and impedance matching. The receive current is as low as 8mA, while the power consumption at 0 dBm transmit power is only 14mA. Typical receive sensitivity reaches up to –99 dBm at a 1 Mbps data rate. This excellent energy performance makes the module highly suitable for power‑sensitive applications such as those powered by button‑cell batteries.
DreamLNK is a high-tech enterprise specializing in ISM band micropower wireless communication technology, providing different kinds of wireless modules and one-stop IoT solutions, including 433/868/915MHz wireless modules, 2.4G wireless Modules, FSK Transceiver Modules, LoRa Modules, BLE Modules, Antennas, Remote Controls, and customized wireless RF solutions. Welcome to inquire!
