QCC5121 is a product of Qualcomm Technologies, Inc., and/or its subsidiaries.


Low Power Bluetooth Audio SoC, designed for use in compact, feature rich wire-free earbuds, hearables and headsets


QC5121 is a part of the QCC5100 Low Power Bluetooth Audio SoC Series.

QC5121 Specs


Bluetooth Version

  • Bluetooth 5.0

Bluetooth Technology

  • Bluetooth Low Energy
  • Bluetooth Low Energy sensor hub
  • Dual-mode Bluetooth

Bluetooth Speed

  • 2 Mbps

Voice Services

Digital Assistant Activation

  • Button press
  • Qualcomm® Voice Activation

General Audio

Audio Technology

  • Qualcomm® Broadcast Audio technology
  • Qualcomm TrueWireless™ Stereo technology
  • Qualcomm TrueWireless™ Stereo Plus technology
  • Qualcomm® Active Noise Cancellation (ANC) technology
  • Qualcomm® aptX™ audio technology
  • Qualcomm® cVc™ audio technology

Qualcomm® aptX™ playback support

  • aptX Classic
  • aptX HD
  • Qualcomm® eXtension program

Audio Playback Support

  • Stereo playback

Qualcomm® Active Noise Cancelling (ANC) technology

  • Feedforward
  • Feedback
  • Hybrid

Qualcomm® cVc™ audio technology

  • 2-mic Headset


CPU Clock Speed

  • Up to 80 MHz

CPU Features

  • Programmable Apps CPU

CPU Bit Architecture

  • 32-bit



  • 80kB (P) + 256kB (D)

DSP Technology

  • 2x Qualcomm® Kalimba™ DSP
  • Configurable DSP

DSP Clock Speed

  • 2x 120 MHz DSP

Power Consumption


  • ~6mA, A2DP stream (SBC), measured at battery terminal, 3.7v including load
  • ~7mA HFP Narrow Band, 1 Digital MIC cVc


Package Type



  • 81 pins (9 x 9)


  • 0.4mm

Package Size

  • 3.98 x 4.02 x 0.5 mm
  1. Qualcomm® Voice Activation with additional license key

License Keys: Qualcomm® aptX™ audio technology, Qualcomm® Active Noise Cancellation (ANC) technology and Qualcomm® Voice Activation require a software license agreement.

QCC5121, Qualcomm aptX, Qualcomm Active Noise Cancelling, Qualcomm Voice Activation, Qualcomm Broadcast Audio, Qualcomm cVc, Qualcomm TrueWireless, and Qualcomm Kalimba are products of Qualcomm Technologies, Inc., and/or its subsidiaries.