FSC-BT1057 Qualcomm QCC5171 Dua-Mode Bluetooth 5.3 LE Audio Transmitter Module

FSC-BT1057(QCC5171) is a premium tier, ultra-low power Bluetooth V5.3 dual-mode audio module that integrated LE Audio and Classic Bluetooth audio, optimized for use in truly wireless earbuds and hearables.

FSC-BT1057 supports LE Audio use cases and CD-Lossless (16-bit 44.1kHz) audio with Snapdragon Sound™ technology, integrated features include third generation Qualcomm® Adaptive Active Noise Cancellation (ANC), with full-band ambient mode for strong, effective noise cancellation and a natural feeling of spatial awareness.

FSC-BT1057 audio codes include aptX, aptX-HD, aptX adaptive, SBC and AAC etc.

Support communicating with the FeasyBlue app and many other Bluetooth apps

Basic Parameter

Bluetooth Module Model


Bluetooth version

Bluetooth 5.3 dual mode




13mm(W) X 26.9mm(L) X 2.2mm(H)

Transmit power

+15dBm (Typ VBAT=3.7V)

Audio code

aptX, aptX-HD, aptX adaptive, SBC and AAC audio codecs


2.402 - 2.480 GHz

Power supply

2.8V~ 4.30V 

Operating temperature

-40°C to +85°C

Storage temperature

-40°C to +85°C


Integrated LE Audio and Classic Bluetooth audio

Excellence in audio

Integrated noise cancellation

Main Features

● Qualified to Bluetooth v5.3 specification
● Extremely low-power performance
● Dual 240 MHz Qualcomm @ KalimbaTM audio DSPs
● 32/80 MHz Developer Processor for applications
● High-performance 24-bit stereo audio interface
● Digital and analog microphone interfaces
● Flexible LED controller and LED pins with PWM support
● Serial interfaces: UART, Bit Serializer (l2C/SPI), USB 2.0
● Support for Qualcomm ANC - feedforward, feedback, hybrid and adaptive
● Support for 3rd party innovation via the Qualcomm® Voice and Music Extension Program
● Integrated PMU: Dual SMPS for system/digital circuits, Integrated Li-ion battery charger


High quality stereo headsets

Wireless speakers

Other Audio Applications

Type Title Date
April 6, 2022
Dimensions26.9 × 13 × 2.2 mm
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FSC-BT1057 Qualcomm QCC5171 Dua-Mode Bluetooth 5.3 LE Audio Transmitter Module
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