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Rayson Electronic Manufactory
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CSR Bluetooth APTX Module

CSR Bluetooth APTX Module

Place of Origin : China
Brand Name : Rayson
Model Number : BTM645
MOQ : 500~1K
Packaging Details : Reel/Tray/Carton
Delivery Time : 7 working days after payment for samples, 8w for MP orders
Payment Terms : T/T, L/C, Check
Supply Ability : 5~10k/day
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CSR Bluetooth APTX Module

Product Description

This is a Bluetooth Class 2 (max 4dBm) module. It is based on CSR 8645 ROM version chip set

which supports Bluetooth V3.0 standard and CSR APTX audio streaming. The APTX feature provide

high quality audio streaming compared to traditional SBC coding. Its latency time is as low as 75ms

which is sufficient for most of the multimedia applications. The Embedded Kalimba DSP Co-Processor

also support the advanced features such as echo cancellation, noise reduction ,and stereo audio

(A2DP profile) communications. Advanced user interface design allows multipoint HFP or A2DP

connections and secure simple pairing. The integrated stereo DAC provide high quality audio

performance with SNR up to 95dB. Support digital audio bus such as PCM, I2S or SPDIF. And the

on chip Switched-Mode Regulator and Li-ion battery charger eliminate the needs of external

components and costs. The true single chip solution to audio applications. Internal ROM, serial flash

and EEPROM enable the flexibilities of the module to meet various kinds of applications.


  • High quality wireless stereo headset with APTX features.
  • High quality wireless stereo speaker with APTX features.
  • Hands-free car kits.
  • VOIP or land line phones wireless headsets.

Product Benefits

  • Cost effective ROM version.
  • Not required for initial technology transfer fee of APTX.
  • Simple design and easy to use.
  • Flexible configurations for various kinds of applications

Product Specification


13.4 x 13.4 x 2.7 mm (8M SPI Flash for voice prompts)

13.4 x 13.4 x 1.9 mm (EEPROM)

Bluetooth Standard

Bluetooth 3.0

RF Power

4dBm maximum

Receiving Sensitivity


Program Memory

ROM version

Physical Interfaces

Digital PIOs, Analogue IOs,

Supply Voltage

2.7V – 4.25V

Product Tags:

Low Energy module


serial flash Module

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CSR Bluetooth APTX Module Images

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