BT740 - Enhanced Bluetooth v2.1 Class 1 Module

The compact Laird BT740 series Class 1 Bluetooth® module, providing maximum range, offer a broad range of Bluetooth profiles such as Serial Port Profile (SPP) and other vital features, making BT740 modules superior to other Class 1 Bluetooth modules.

Every BT740 series Bluetooth® module from Laird 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.

With a compact footprint of 15.29 x 28.71 mm, the modules deliver maximum range with a minimum size. Another integration advantage is the inclusion of a complete Bluetooth protocol stack with support for Multi-Point connections and numerous Bluetooth profiles, including Serial Port Profile (SPP), Human Interface Device profile (HID), and Health Device Profile (HDP). BT740 modules are fully qualified as a Bluetooth End Products, enabling designers to integrate the modules in devices without the need for further Bluetooth Qualification. In addition, each module carries FCC Modular, IC, and complete CE certification to further reduce the regulatory approval process for OEM integrators.

An integrated AT command processor interfaces to the host system over a serial port using an extensive range of AT commands. The AT command set abstracts the Bluetooth protocol from the host application, saving many months of programming and integration time. It provides extremely short integration times for data oriented Bluetooth applications.

In addition to the AT command set, the firmware also provides programming support for Multi-Point applications that use up to seven simultaneous data connections to, and from, the robust BT740 module. A low-cost developer's kit makes it easy for an OEM to integrate the module and guarantees the fastest route to prototype and then mass production.

Key features:

  • Bluetooth v2.1
  • External or Internal Antennas
  • Comprehensive AT command set or Multi-Point programming
  • Bluetooth EPL with FCC, IC, and CE approvals
  • Compact Footprint
  • Class 1 output - 18 dBm
  • UART interfaces with GPIO & ADC
  • Industrial Temperature range -40° to +85°C
  • Multipoint capabilities with up to 7 simultaneous connections
  • Field proven firmware from the BTM44x series modules

For sales and technical development support from our in-house engineering team, please contact the Alpha Micro team.

Feature Specification
Wireless
Bluetooth V2.1
Frequency 2.402 - 2.480GHz
Max Tx Power

Class 1

18dBm from antenna

Rx Sensitivity Better than -87dBm
Range up to 1,000m
Data Rates Up to 2.1 Mbps (over the air)
UART Data Transfer Rate ±350kbps
Host Interfaces
UART

TX, RX, DCD, RI, DTR, DSR, CTS, RTS

Default 9600, n, 8, 1

From 1,200 to 921,600 bps

GPIO 8 configurable lines
ADC 2 lines, 8 bit resolution
Profiles
SPP Serial Port Profile
HID Human Interface Device
HDP Health Device Protocol
Control Protocols

AT Command Set - 1 connection

Multi-Point API - 7 simultaneous connections

Supply Voltage
Supply

3.3V - 5.0V

I/O 3.3V
Power Consumption
Current Consumption

Idle (sleep) 1.25mA

Transmit (Max) 35mA

Connections
External Antenna Connection via U.FL - BT740-SC-xx
Internal Antenna Multilayer Ceramic - BT740-SA-xx
Physical
Dimensions

28.71mm(L) x 15.29mm(W) x 3mm(D)

Weight 2g
Environmental
Operating Temperature -40°C to +85°C
Storage Temperature -40°C to +85°C
Approvals
Bluetooth End Product Listing (EPL)
FCC/IC/CE

All BT730 series

RoHS

Lead-free and RoHS compliant

Warranty 1 year
  • Medical devices
  • ePOS terminals
  • Automotive diagnostic equipment
  • Barcode scanners
  • Industrial cable replacement
Part No.
Description
Pack Sizes
BT740-SA-xx
Class 1 Bluetooth v2.1 Module - Integrated Antenna (Multilayer ceramic internal antenna)

Trays of 60

BT740-SC-xx
Class 1 Bluetooth v2.1 Module - u.FL Connector for external antenna connection
Trays of 60
DVK-BT740-SA-xx
Development Kit for BT740 Module (BT740-SA - Integrated Antenna)
Each
DVK-BT740-SC-xx Development Kit for BT740 Module (BT740-SC - u.FL Connector) Each
See also:
BT730-SA-xx Class 1 Bluetooth v2.0 Module - Integrated Antenna (Multilayer ceramic internal antenna) Trays of 60
BT730-SC-xx Class 1 Bluetooth v2.0 Module - u.FL Connector for external antenna connection Trays of 60
DVK-BT730-SA-xx Development Kit for BT730 Module (BT730-SA - Integrated Antenna) Each
DVK-BT730-SC-xx Development Kit for BT730 Module (BT740-SC - u.FL Connector) Each

xx - Current firmware version at time of ordering

The DVK-BT740-Sx development board is a universal development tool, used to highlight the capabilities of the BT740 module.

Two variants are offered:

DVK-BT740-SA

This development kit is used for evaluating the BT740-SA Bluetooth Class 1 v2.1 module with an integrated multi-layer ceramic chip antenna.

AlphaMicro_Laird_BT740SA_Set_FINAL_300px
DVK-BT740-SC

This version is used for evaluating the BT740-SC Bluetooth Class 1 v2.1 module with a U.FL connector for external antenna connection.

AlphaMicro_Laird_BT740SC_Set_FINAL_300px

Development kits contain:

  • Development board- BT7xx-Sx module mounted onto a PCB daughterboard, fitted to the development board using a 40-way connector
  • USB cable
  • RS-232 serial cable
  • Bluetooth USB adapter
  • Laird terminal emulation software
  • External antenna (only with kits for BT7xx-SC modules)

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Last updated: 7 September 2017