BTM511 - Bluetooth v2.1+EDR Audio Modules

Low-power Bluetooth® modules for robust audio and voice capabilities.

Laird BTM 511 modules are low-power Bluetooth® modules designed for adding robust audio and voice capabilities. Based on the market-leading Cambridge Silicon Radio BC05 chipset, these modules provide exceptionally low power consumption with outstanding range. Supporting the latest Bluetooth Version 2.1+EDR specification, these modules provide the important advantage of secure simple pairing that improves security and enhances easy use.

The compact size of the BTM511 makes it ideal for battery-powered or headset form factor audio and voice devices. With a 16-bit stereo codec and microphone inputs to support both stereo and mono applications, these modules also contain a full, integrated Bluetooth-qualified stack along with SPP, HFP 1.5, HSP, AVRCP, and A2DP profiles. (Customers using these modules may list and promote their products free of charge on the Bluetooth website.)

The BTM511 modules include an embedded 32-bit, 64-MIPS DSP core within the BC05. Integrated Bluetooth functionality allows designers to add significant product enhancements including features such as echo cancellation, noise reduction, and audio enhancement using additional soft codecs. The availability of the 16MB of flash memory in the module allows complex functionality to be included. DSP routines can be licensed through a number of specialist partners.


  • Fully featured Bluetooth multimedia chipset
  • Bluetooth v2.1+EDR
  • Supports mono and stereo headset applications
  • apt-X Audio Codec provided free of charge
  • Adaptive frequency hopping to cope with interference from other wireless devices
  • 32-bit Kalimba DSP for enhancedaudio applications
  • Support for secure simple pairing
  • On-board antenna option option only
  • HSP, HFP, A2DP, and AVRCP audio profiles
  • 16-bit stereo codec and microphone input
  • AptX, AAC and SBC codecs supported
  • CVC audio enhancement supported
  • EIR fully supported
  • Integrated audio amplifiers for driving stereo speaker
  • Comprehensive AT interface for simple programming
  • Bluetooth End Product qualified
  • Compact size
  • Class 2 output - 4 dBm
  • Low power operation
  • WLAN co-existence hardware support

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

* BTM510 is End-of_life. Last date for orders was 19 February 2016. There is no recommended alternative.

  • Antenna Type - Internal - Multilayer ceramic (BTM511)
  • Applications
    Audio Headsets, Wireless Audio Cable Replacement, MP3 and Music Players, Phone Accessories, VoIP Products, Aftermarket Automotive, Automotive Audio System, Home Audio System, Security Devices, Sensors
  • Bluetooth Version
    v2.1 + EDR or v3.0
  • Connector Type
  • Development Kit Contents
    Development board and software tools
  • Dimensions (L x W x H)
    25.00 x 14.00 x 3.40 mm (0.98 x 0.55 x 0.13 in)
  • Frequency
    2.402 - 2.480 GHz
  • Industries
    Automotive, Industrial / Production, Mobile Devices, Computer / Gaming, Telecom, Other
  • Logical Interfaces
  • Max Transmit Power
    4 dBmi (from integrated antenna BTM511)
  • Power Consumption
    Operational: Less than 70 mA (including speaker amplifiers). Idle (sleep): < 1.0 mA. Configurable sniff mode and subrating only in firmware v22.2.5.0.
  • Product Line
    Bluetooth v3.0 Audio
  • Profiles
    SPP (Serial Port Profile), HSP, HFP (Audio Gateway and Handset, v1.6 in firmware v22.2.5.0), A2DP (Source and Sink), AVRCP (Target and Controller, v1.5 in firmware v22.2.5.0)
  • Range
    Up to 30 meters
  • Receive Sensitivity
    Better than -86 dBm
  • Voltage
    3.0 to 3.6
  • Weight
    .105 oz (3 g)
  • Wi-Fi Coexistence
    2 wire and 3 wire schemes supported
  • Wireless Specification
    802.11 b/g
  • High-quality stereo headsets
  • Mono voice headsets
  • Hands-free devices
  • Wireless audio cable replacement
  • MP3 and music players
  • Phone accessories
  • VoIP products
  • Cordless headsets
  • Aftermarket automotive applications
Partl No.
Pack Sizes

Bluetooth Multimedia module (external antenna)

* BTM510 is End-of-Life. Last date for orders was 19 February 2016. There is no recommended alternative.


BTM511 Bluetooth Multimedia module (with integrated antenna)
Tray of 50
DVK-BTM511 Development board with BTM511 module soldered on Each

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Last updated: 22 May 2018