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Bluetrum AB5656B is a high-performance Bluetooth 6.0 audio SoC in a QFN20 (3×3mm) package, suitable for TWS true wireless headphones, open-ear headphones (OWS) and surround sound Bluetooth audio devices. The chip is based on a 32-bit RISC-V processor, integrates a DSP instruction set, supports high-fidelity audio codecs, and low-power Bluetooth connectivity, making it widely applicable in both consumer and professional audio markets.

AB5656B Core Features

Bluetooth 6.0 dual-mode support

Compliant with the Bluetooth 6.0 protocol (some versions compatible with 5.4), providing more stable connections and lower power consumption.

TX maximum output power +9dBm, RX sensitivity -90.5dBm (baseline rate)/-94dBm (EDR), ensuring stable long-range transmission.

High-Performance Audio Processing  

16-bit stereo DAC (102dB SNR) supports SBC/AAC high-definition audio codecs, delivering high-fidelity sound quality.  

16-bit ADC (94dB SNR) supports ENC (environmental noise cancellation) and AEC (echo cancellation), optimising call clarity.

Low-power design

Utilises 40nm ULP process technology to optimise battery life, with standby current as low as microampere level.

Integrated PMU (Power Management Unit) with built-in charging management and buck/LDO, reducing the need for external circuits.

Rich storage resources

1Mbit internal flash memory (for firmware storage)

113KB RAM (running cache).

Package and operating temperature

QFN20 (3×3mm) package, compact size, easy to integrate into compact earphone designs.

Operating temperature range: -40°C to +85°C, suitable for various environmental requirements.

AB5656B Typical Applications

TWS true wireless headphones (supports dual-ear synchronous transmission)

Sports headphones (low power consumption + ENC noise reduction)

Business call headphones (high-definition voice + noise reduction)

Bluetooth speakers (surround sound output)

• 1.Is the inventory and price seen on the platform accurate?

  A: all online goods on the shelves can be ordered online, but considering the large liquidity of spot inventory, it is not possible to achieve 100% accuracy at present. In case of any abnormality, you can contact our company online and give the corresponding solution.

• 2.Are all our products genuine?

  A: our self-supporting products are from cooperative domestic and foreign original factories or authorized agents, and the source can be traced to ensure the original and authentic products.

• 3.Can you provide the qualification certificate of the original factory or agent?

  A: at present, our self-employed brands TI，ST，ADI，NXP，LATTICE，CYPRESS，INFINEON，XILINX and other first-line brands. Other channels are the original factory and agency channels. If necessary, we can communicate and confirm according to the specific brand and model.

• 4.Can I make an inquiry through the company's website?

  A: You can inquire through the website, or by phone and email.

• 5.When can I deliver the goods after placing an order? How long will it take to get there?

  A: the delivery date is marked in most commodity information. You can estimate the delivery time of the commodity according to the delivery date. The specific arrival time depends on the warehouse where the commodity is located and the logistics mode you choose.

• 6.Can the company issue an invoice?

  A: you can issue ordinary invoices for individual users or special VAT invoices for enterprise users.