We are pleased to announce that as of August 13, 2015, Qualcomm Global Trading Pte. Ltd., a subsidiary of Qualcomm Incorporated, has completed its acquisition of CSR plc. For more information, please see the press release .


The CSR8635™ QFN single-chip Bluetooth® audio ROM device targets mid-range stereo speakers and headsets.

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  • Bluetooth 4.1
  • HFP1.6, A2DP1.2 and  AVRCP1.4
  • HD voice (wideband speech)
  • Advanced Multi-point (2xHFP, 2xA2DP)
  • Wired Audio (Stereo Line-in)
  • Music Enhancements (Multi-band EQ)
  • iOS battery status monitor
  • Smart Apps support (GAIA)
  • Multi-Language programmable audio prompts
  • Configurable LED drivers
  • 6th generation cVc®
    • 1-mic Far-end NR / AEC algorithms for headset
    • Frequency enhanced speech intelligibility (FESI)

Flexible ROM based platform

  • Fully configurable MMI and tool chain


  • 68-pin QFN, 8x8mm, 0.4mm pitch
  • Pin compatible with CSR8630
  • Single-chip solution for portable stereo Bluetooth speakers / speakerphones , 1-mic stereo headsets and hands-free car kits
  • Highly integrated single-chip in QFN package for low eBOM and reduced manufacturing costs
  • Delivers a quality stereo Bluetooth audio experience to cost sensitive products

Key Feature

Value to the Customer

Value to the User


High quality audio streaming device for stereo headsets

Go-anywhere, listen to your music and stay in touch

Smart Apps support (Using GAIA)


Use Apps for product differentiation

Interactive accessory

Enhanced User experience


Multi-Band EQ

Volume Boost


Fully configurable EQ (5-band / 6-banks) . Dynamic volume boost / cut

Up to 6 user selectable preset EQs for high quality sound with no distortion

Audio Inputs

Extends use to devices that don’t have Bluetooth

Connect to wired legacy media player device

Headset cVc

Enhanced voice performance for product differentiation, with Wideband Speech support

Enables user to take HD Voice calls wherever they happen to be

Rapid Support Charge

Support higher charge currents and eliminate need for external battery charger

Charge your headset much faster


Terms of Supply

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