FSC-BT1046 QCC3056 Small Size Bluetooth 5.3 TWS Audio Transmitter Module


FSC-BT1046 is a Bluetooth dual-mode module supporting Bluetooth Low Energy and compliant systems for audio and data communication. It integrates an ultra-low-power DSP and application processor with embedded flash memory, a high-performance stereo codec, a power management subsystem, I²S, LED drivers, and ADC I/O. Both cores use external flash to execute code, allowing users to differentiate products with new features without delaying development. The FSC-BT1046 module comes equipped with powerful and easy-to-use Feasycom firmware, enabling users to access Bluetooth functionality with simple ASCII commands delivered to the module over a serial interface, similar to a Bluetooth modem. This makes FSC-BT1046 an ideal solution for developers seeking to integrate Bluetooth wireless technology into their designs.


  • Qualified to Bluetooth® v5.3 specification
  • 120 MHz Qualcomm® Kalimba™ audio DSP
  • 32/80 MHz Developer Processor for applications
  • High-performance 24-bit audio interface
  • Active Noise Cancellation: Hybrid, Feedforward, and Feedback modes, using Digital or Analog Mics, enabled using license keys available from Qualcomm®
  • Analog Audio: Differential Class AB/D Outputs
  • aptX, aptX HD Audio
  • Serial interfaces: UART, Bit Serializer (I²C/SPI), USB 2.0
  • Integrated Li-ion battery charger (Max 200mA)
  • Low power modes to extend battery life
  • Qualified to Bluetooth v5.3 specification including 2 Mbps Bluetooth Low Energy and Bluetooth Low Energy 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
  • USB to Bluetooth dongle
  • Bluetooth Speaker
  • HD Audio Transmitter/Receiver


Categories Features Implementation
Wireless Specification Chip QCC3056
Bluetooth Version V5.3
Frequency 2.402 ~ 2.480 GHz
Transmit Power
(Basic Rate)
+10 dBm (Typ. VBAT=3.7V)
Receive Sensitivity
(Basic Rate, VBAT=3.7V)
2.402GHz: -95.5 dBm (Typ.)
2.441GHz: -96 dBm (Typ.)
2.480GHz: -96 dBm (Typ.)
Supply Voltage Supply VDD_IO: 1.7V ~ 3.3V; VBAT_IN: 2.8V ~ 4.3V
Power Consumption(Load=10KΩ, VBAT_IN=3.3V) Play: < 5 mA ---*Average
Pairing: < 5 mA ---*Average
OFF: < 100 uA ---*Average
Physical Dimensions (mm) 12.4 × 12.4 × 1.8
Environmental Operating -40°C ~ +85°C
Storage -40°C ~ +85°C
Miscellaneous Lead Free Lead-free and RoHS compliant
Warranty One Year
Humidity 10% ~ 90% non-condensing
MSL Grade MSL 3
ESD Grade Human Body Model: Class 2 2KV
Charged Device Model: Class III 500V
Scroll to Top

Send Inquiry