Qualcomm unveils QCC305x/QCC3056 TrueWireless, Bluetooth LE Audio-ready SoC for earbuds

Qualcomm has some SoC families specifically designed for Bluetooth headphones, headsets, & earbuds, and we very recently covered the cute Qualcomm QCC5141 Earbud reference design made to help manufacturers design and launch earbuds with support for TrueWireless Mirroring and Hybrid ANC.

The company has now introduced another family with the QCC305x SoC series aiming to “bring premium True Wireless earbud features to a broad range of tiers” such as Qualcomm Adaptive Active Noise Cancellation (ANC) and wake word activated voice assistant, as well as support for the upcoming Bluetooth LE audio standard.

Qualcomm QCC305x TrueWireless Bluetooth LE Audio SoC

The first and only member of QCC305x family at this time is QCC3056 with the following key features and specifications:

  • CPU – 32-bit programmable application core clocked at up to 80 MHz
  • DSP – 2x Qualcomm Kalimba DSP @ 120 MHz with 112kB program RAM, 448kB data RAM
  • Storage – External flash
  •  Connectivity
    • Bluetooth 5.2 qualified
    • BR, EDR, Bluetooth Low Energy, Dual-mode Bluetooth
    • Bluetooth LE audio-ready
    • Speed up to 2 Mbps, 3 Mbps
  • Audio
    • Technology – Qualcomm TrueWireless Mirroring, Adaptive Active Noise Cancellation, Qualcomm cVc™ Echo Cancellation and Noise Suppression,  Active Noise Cancellation, aptX audio technology
    • Qualcomm aptX audio playback support – aptX Voice, aptX Adaptive at up to 96Khz audio resolution
    • Voice Services Support – Amazon Alexa Voice Service, Google Assistant (and others)
    • Qualcomm Active Noise Cancelling (ANC) technology – Feedback, Adaptive, Feedforward, Hybrid
    • Qualcomm cVc Echo Cancellation and Noise Suppression (ECNS) technology: 2-mic Headset, 1-mic Headset
    • Digital Assistant Activation – Button press, Always on voice wake-word support
    • Audio Playback – 1-channel (mono) 99dBA Class-D headset
    • 24-bit audio interfaces
  • Power Consumption – <5 mA
  • Package – 94-pin WLCSP with 0.4mm pitch (4.38 x 4.26 x 0.4mm)


The new QCC3056 chip comes with four cores instead of just three cores in the previous QCC30xx models due to an extra DSP, and adds support for adaptive ANC and wake word as shown in the comparison table below.

Qualcomm QCC30xx earbuds comparison table

Eventual support for the Bluetooth LE Audio standard will enable sharing music from one smartphone to multiple wireless listeners at the same time.

Additional details may be found in the press release and product page.

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