BTM42X Series
Overview
The BTM420/BTM421 Bluetooth modules are designed to meet the needs of developers adding robust, short range Bluetooth data connectivity to their products and using embedded Bluetooth stacks within these products. They are based on the market-leading Cambridge Silicon Radio BC04 chipset, providing exceptionally low power consumption with outstanding range. Supporting the latest Bluetooth Version 2.1 Specification with EDR (Enhanced Data Rate), HCI Data Modules increase data throughput up to 2.1 Mbps. BT version 2.1 provides the advantage of Secure Simple Pairing that improves security and enhances ease of use for end customers.
Note: The BTM420-xx and BTM421-xx variants have reached end of production and are available on a limited basis only. Find the End of Life Announcement in the Documentation tab below.
Specifications
| Product Type | Technology | OS/Software | System Architecture | Chipset (Wireless) | Antenna Type | Logical Interfaces | Frequency Range (Min) | Frequency Range (Max) | Antenna Options | Bluetooth Version | Compliance | Connector | Data Rate | Development Kit Contents | Dimension (Height - mm) | Dimension (Length - mm) | Dimension (Width - mm) | Input Power | Transmit Power (Max) | Power Consumption | Protocols | Range | Receive Sensitivity | Software | Weight | Wi-Fi Coexistence | Wireless Specification | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BTM420 | Embedded Module | Bluetooth Classic, Bluetooth 2.1 + EDR | AT Commands, HCI | Hosted | QCA (CSR) BC04 | External | HCI | 2402 MHz | 2480 MHz | Trace Pin | v2.1 + EDR | FCC / IC / CE | SMT | 2.1 MBps | Development board | 3.4 mm | 18 mm | 12.5 mm | 3.1 - 3.3V | +4 dBm | 32mA | AT Command Set | Up to 30 meters | -84 dBm | Terminal Software | .105 oz (3 g) | 2 wire and 3 wire schemes supported | Bluetooth v2.1 + EDR |
| Product Type | Technology | OS/Software | System Architecture | Chipset (Wireless) | Antenna Type | Logical Interfaces | Frequency Range (Min) | Frequency Range (Max) | Bluetooth Version | Compliance | Connector | Data Rate | Development Kit Contents | Dimension (Height - mm) | Dimension (Length - mm) | Dimension (Width - mm) | Input Power | Transmit Power (Max) | Power Consumption | Protocols | Range | Receive Sensitivity | Software | Weight | Wi-Fi Coexistence | Wireless Specification | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| BTM421 | Embedded Module | Bluetooth Classic, Bluetooth 2.1 + EDR | AT Commands, HCI | Hosted | QCA (CSR) BC04 | Internal | HCI | 2402 MHz | 2480 MHz | v2.1 + EDR | FCC / IC / CE | SMT | 2.1 MBps | Development board | 3.4 mm | 24 mm | 12.5 mm | 3.0 - 3.3V | +4 dBm | 32mA | AT Command Set | Up to 30 meters | -84 dBm | Terminal Software | .105 oz (3 g) | 2 wire and 3 wire schemes supported | Bluetooth v2.1 + EDR |
| Product Type | Technology | OS/Software | System Architecture | Chipset (Wireless) | Antenna Type | Logical Interfaces | Frequency Range (Min) | Frequency Range (Max) | Bluetooth Version | Connector | Data Rate | Transmit Power (Max) | Protocols | Range | Receive Sensitivity | Software | Wi-Fi Coexistence | Wireless Specification | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DVK-BTM420 | Development Kit | Bluetooth Classic, Bluetooth 2.1 + EDR | AT Commands | Hosted | QCA (CSR) BC04 | Internal | USB, Serial | 2402 MHz | 2480 MHz | v2.1 + EDR | USB Pluggable | 2.1 MBps | +4 dBm | AT Command Set | Up to 30 meters | -84 dBm | Terminal Software | 2 wire and 3 wire schemes supported | Bluetooth v2.1 + EDR |
| Product Type | Technology | OS/Software | System Architecture | Chipset (Wireless) | Antenna Type | Logical Interfaces | Frequency Range (Min) | Frequency Range (Max) | Bluetooth Version | Connector | Data Rate | Transmit Power (Max) | Protocols | Range | Receive Sensitivity | Software | Wi-Fi Coexistence | Wireless Specification | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| DVK-BTM421 | Development Kit | Bluetooth Classic, Bluetooth 2.1 + EDR | AT Commands | Hosted | QCA (CSR) BC04 | Internal | USB, Serial | 2402 MHz | 2480 MHz | v2.1 + EDR | USB Pluggable | 2.1 MBps | +4 dBm | AT Command Set | Up to 30 meters | -84 dBm | Terminal Software | 2 wire and 3 wire schemes supported | Bluetooth v2.1 + EDR |
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Documentation
Is it safe to run a Laird Connectivity Bluetooth module through a PCBA wash cycle?
In general, cleaning the populated modules is strongly discouraged. Residuals under the module cannot be easily removed with any cleaning process.
- Cleaning with water can lead to capillary effects where water is absorbed into the gap between the host board and the module. The combination of soldering flux residuals and encapsulated water could lead to short circuits between neighboring pads. Water could also damage any stickers or labels.
- Cleaning with alcohol or a similar organic solvent will likely flood soldering flux residuals into the RF shield, which is not accessible for post-washing inspection. The solvent could also damage any stickers or labels.
- Ultrasonic cleaning could damage the module permanently.
However, if water washing is required you will need to use deionized water. We do not recommend chemical cleaning and cannot guarantee it will not damage the modules. If you MUST clean PCB with chemicals it is recommended that you test on one board and then confirm the module still works after the process, prior to adding it to production, while understanding the above affects washing the populated PCBs can have on the module.