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AB5656T is a high-performance Bluetooth audio SoC launched by Bluetrum, specifically designed for TWS (true wireless) earphones. It supports the Bluetooth 5.4 connection protocol and is suitable for high-quality, low-latency wireless audio applications. The chip uses a 32-bit RISC-V processor, integrates a DSP instruction set, and has a built-in power management unit (PMU) to provide stable audio processing and low-power operation.

AB5656T Core Features

Bluetooth 5.4 Connectivity

Compliant with the Bluetooth 5.4 specification, supporting classic Bluetooth audio (A2DP/AVRCP/HFP), but does not support LE Audio (low-power audio).

Transmission range: approximately 15 metres (depending on the environment).

High-performance audio processing

32-bit RISC-V processor (125MHz) with DSP instruction support, optimising audio encoding and decoding efficiency.

16-bit single-channel DAC (signal-to-noise ratio 102dB) for high-fidelity sound quality.

16-bit single-channel ADC (SNR 94dB), supports ENC (environmental noise cancellation), enhancing call clarity.  

Low-power design  

Built-in PMU (power management unit), supports low-power mode, extending earphone battery life.  

30mW drive capability, supports bass enhancement technology, optimising audio performance.  

Rich peripheral support  

GPIO programmable control, supports touch buttons and LED status indicators.

Built-in 1Mbit flash memory (AB5656C2 version), supporting firmware upgrades.

AB5656T Typical Applications

TWS True Wireless Earbuds: Supports dual-ear synchronous transmission and low-latency audio playback.

OWS Open-Ear Headphones: Optimises sound quality for open-ear structures and supports directional sound transmission technology.

Sports/Business Headphones: ENC noise cancellation + bass enhancement, suitable for calls and music scenarios.

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