BT740 Series Bluetooth Module
Overview
Every BT740 series Bluetooth module from Ezurio (formerly Laird Connectivity) is designed to add robust, long-range Bluetooth data connectivity to any device. Based on the market-leading Cambridge Silicon Radio (CSR) BC04 chipset, BT740 modules provide exceptionally low power consumption with outstanding Class 1 range via 18 dBm of transmit power. The modules support Bluetooth Version 2.1 specification, including Secure Simple Pairing (SSP), which improves security and enhances the ease of use for end customers. A broad range of Bluetooth profiles such as Serial Port Profile (SPP) and other vital features make BT740 modules superior to other Class 1 Bluetooth modules. Available in BT740-SA and BT740-SC variants.
Development Kits
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DVK-BT740-SA
Not Recommended for New Design (NRND)Development kit for BT740-SA module
Antenna TypeInternalLogical InterfacesUSB, PCM, RS232 -
DVK-BT740-SC
Not Recommended for New Design (NRND)Development kit for BT740-SC module
Antenna TypeExternalLogical InterfacesUSB, PCM, RS232
Certified Antennas
Specifications
UART: Over 350 kbps
GPIO (8 configurable lines)
ADC (2 lines, 8 bit resolution)
Transmit (Max Data) – 35 mA
Multi-Point API - 7 simultaneous connections
I/O: 3.3V
Part Number | Antenna Options | Antenna Type | Bluetooth Version | Chipset (Wireless) | Compliance | Connector | Data Rate | Frequency Range (Max) | Frequency Range (Min) | Logical Interfaces | OS/Software | Product Type | Protocols | Range | Receive Sensitivity | System Architecture | Technology | Transmit Power (Max) | Wireless Specification |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
BT740-SA Not Recommended for New Design (NRND) Buy Now | Internal | v2.1 | QCA (CSR) BC04 | FCC, ISED, EU | SMT | Up to 2.1 Mbps | 2480 MHz | 2402 MHz | Serial, GPIO, ADC | AT Commands, Embedded Stack | Embedded Module | AT Command Set | Up to 1 km | Better than -87 dBm | Hosted | Bluetooth Classic, Bluetooth 2.1 | +18 dBm | Bluetooth v2.1 Enhanced Class 1 | |
BT740-SC Not Recommended for New Design (NRND) Buy Now | u.FL Connector | External | v2.1 | QCA (CSR) BC04 | FCC, ISED, EU | SMT | Up to 2.1 Mbps | 2480 MHz | 2402 MHz | Serial, GPIO, ADC | AT Commands, Embedded Stack | Embedded Module | AT Command Set | Up to 1 km | Better than -87 dBm | Hosted | Bluetooth Classic, Bluetooth 2.1 | +18 dBm | Bluetooth v2.1 Enhanced Class 1 |
Documentation
CSR Bluesuite Bluetest3 crashes when trying to select the transport.
Bluesuite is a very old program supplied by CSR for testing and configuration of its legacy Bluetooth modules. Bluesuite Bluetest3 is often used for RF testing where the DUT is put into BCSP mode before running Blutest3.
If Bluetest3 crashes with an "array" error you may have a conflict or issue with your .net installation. You may be able to fix the issue by removing all versions of .net but please speak to your IT department first as this may cause issues with other software.
Is a licence required to use the LC3 audio codec?
Use of the LC3 codec is included in the Bluetooth product licence when you qualify your product. No additional licence fees are required.
Do I still have to list/qualify my product with the BT SIG even if I don't use the BT logo?
Yes, you need to qualify/list any product that uses BT SIG intellectual property, even if you do not use the logo or require interoperability with other BT devices. see here for more details. Qualify Your Product | Bluetooth® Technology Website
Is it safe to run a Ezurio 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.
What is the throughput of your bluetooth modules with the embedded AT command interface?
Our fully-embedded modules have a throughput of around 300-360 kbps. They have an on-board Bluetooth stack and do all of the Bluetooth processing themselves. Bluetooth 2.1 + EDR has a practical transfer rate of 2.1 Mbit/s, but this is not possible on a small embedded module that does not have a powerful PC-type processor.
For more information on the throughput of the BT740, see the following application note: BTM44X Enhanced Data Module: Throughput Analysis. The throughput analysis on the BTM44X is also relevant to the BT740.
How is power adjusted on the B7xx?
While the power adjustment cannot be done manually, the radio automatically adjusts the Tx power based on the RSSI and Golden Receive Power Range values. For more information on this, please review the following guide: User Guide - BT740 Firmware.pdf
Become an Ezurio Customer to Gain Exclusive Access to Our Design Experts
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- Embedded RF hardware / firmware design
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- Mobile application development
- Product & Industrial Design
Buy Now
Distributor | Part | In Stock | Region | Buy |
---|---|---|---|---|
DigiKey | BT740-SA | 1222 | North America | Buy Now |
Mouser | BT740-SA | 330 | North America | Buy Now |
Mouser | BT740-SC | 259 | North America | Buy Now |
DigiKey | BT740-SC | 143 | North America | Buy Now |
Farnell | BT740-SC | 0 | EMEA | Buy Now |
Future Electronics | BT740-SC | 0 | North America | Buy Now |
DigiKey | DVK-BT740-SA | 3 | North America | Buy Now |
Farnell | DVK-BT740-SA | 0 | EMEA | Buy Now |
Future Electronics | DVK-BT740-SA | 0 | North America | Buy Now |
Avnet | DVK-BT740-SC | 0 | North America | Buy Now |
Farnell | DVK-BT740-SC | 0 | EMEA | Buy Now |
Future Electronics | DVK-BT740-SC | 0 | North America | Buy Now |
Mouser | DVK-BT740-SC | 0 | North America | Buy Now |
Distributors
Distributor | Phone Number | Region | Website |
---|---|---|---|
Arrow Electronics | 1-855-326-4757 +44 2039 365486 |
APAC, North America, South America, EMEA | Website |
Avnet | 1-480-643-2000 +44 1628 512900 |
APAC, North America, South America, EMEA | Website |
Braemac Australia, New Zealand, South East Asia | +61 2 9550 6600 +64 9 477 2148 |
APAC | Website |
Cal-Chip Connect | 1-215-942-8900 |
North America | Website |
DigiKey | 1-800-344-4539 |
North America, South America, APAC, EMEA | Website |
EBV Elektronik | EMEA | Website | |
Farlink Technology China, Hong Kong | +86 13266922199 |
APAC | Website |
Farnell | 1-800-936-198 +44 3447 11 11 22 |
EMEA | Website |
Future Electronics | 1-800-675-1619 1-514-428-8470 |
North America, South America, APAC, EMEA | Website |
Glyn | +49-6126-590-0 |
EMEA | Website |
Hy-Line Germany Only | +49 89 614 503 0 |
EMEA | Website |
Jetronic China, Hong Kong and Taiwan | 852-27636806 |
APAC | Website |
Laird Connectivity | 1-847-839-6925 +44 1628 858941 |
North America, South America, APAC, EMEA | Website |
M2M Germany | +49-6081-587386-0 |
EMEA | Website |
Martinsson | +46 8 7440300 |
EMEA | Website |
McCoy South East Asia | +65 6515 2988 |
APAC | Website |
Mouser | 1-800-346-6873 +44 1494 427500 |
North America, South America, APAC, EMEA | Website |
RS Components | +852-2421-9898 +44 3457-201201 |
North America, South America, APAC, EMEA | Website |
Ryoyo Japan | +81-3-3543-7711 |
APAC | Website |
Solsta UK Only | +44 (0) 1527 830800 |
EMEA | Website |
Supreme Components International India, South East Asia | +65 6848-1178 |
APAC | Website |
Symmetry Electronics | 1-866-506-8829 |
North America | Website |
Tekdis Australia and New Zealand | +61 3 8669 1210 |
APAC | Website |
Telsys | +972 3 7657666 |
EMEA | Website |
WPG | +44 1628 958460 |
EMEA | Website |