FSC-BT1037A Qualcomm QCC3071 Dual-Mode Bluetooth 5.3 LE Audio Module for TWS Earbuds


The Feasycom FSC-BT1037A is a dual-mode Bluetooth 5.3 LE Audio module that supports audio and data communication. FSC-BT1037A integrates an ultra-low-power PMU and application processor with embedded flash memory, a high-performance stereo codec, Class-AB and Class-D headphone drivers, a power management subsystem, I2S, I2C, UART, PIO, LED drivers and ADC I/O in a SoC IC. Both cores use external flash to execute code, making it easy for user to differentiate products from new features without delaying the development.


  • Qualified to Bluetooth® v5.3 specification
  • 240 MHz Qualcomm® Kalimba™ audio DSPs
  • 30/80 MHz Developer Processor for applications
  • Firmware Processor for system
  • High-performance 24-bit stereo audio interface
  • Digital and analog microphone interfaces
  • Flexible LED controller and LED pins with PWM support
  • Supports UART, Bit Serializer (I2C/SPI), and USB 2.0 serial interfaces
  • Advanced audio algorithms
  • Active Noise Cancellation: Hybrid, Feedforward, and Feedback modes, using Digital or Analog Mics, enabled using license keys available from Qualcomm®
  • Supports Qualcomm® LE Audio, aptx™, aptX™ HD, aptX™ Adaptive, and aptX™ Lossless
  • Qualcomm® cVc™ Noise Cancellation Technology, enabled using license key
  • Integrated PMU: Dual SMPS for system/digital circuits, Integrated Li-ion battery charger Bluetooth subsystem
  • Qualified to Bluetooth v5.3 specification including 2Mbps BLE and BLE Isochronous Channels
  • Qualcomm® Bluetooth High Speed Link
  • Single ended antenna connection with on-chip balun and Tx/Rx switch
  • Bluetooth, Bluetooth Low Energy, and mixed topologies supported
  • Class 1 support


  • TrueWireless™ stereo earbuds
  • Wired/wireless stereo headsets/headphones


Bluetooth Module FSC-BT1037A
Chipset Qualcomm QCC3071
Bluetooth Version Dual-mode Bluetooth 5.3 and LE Audio
Frequency Band 2.402~2.480GHz
Transmit Output Power +15 dBm (Typ.) 3.7V VBAT
Receive Sensitivity -100.5 dBm (Typ.) 1Mbps BLE
Interfaces UART, GPIO, I2C, SPI, ADC, USB
Audio Codec LE Audio (LC3), aptX, aptX HD, aptX Adaptive, SBC, AAC
Size (mm) 13 × 26.9 × 2.2 (1mm pad pitch)
VDD_IO 1.7~3.3V
VBAT_IN 2.8~4.3V
Operating Temperature -40°C ~ +85°C
Storage Temperature -40°C ~ +85°C

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