FSC-BW126B Silicon Labs EFR32BG21 Dual-Mode Bluetooth 5.2 & Dual-Band Wi-Fi 6 Module

Feasycom FSC-BW126B Bluetooth & Wi-Fi combo module with highly integrated single-chip supports 2-stream 802.11ax solutions with Multi-user MIMO (Multiple-Input, Multiple-Output) with Wireless LAN (WLAN) PCI Express network interface controller and HS-UART mixed interface. It combines a WLAN MAC, a 2T2R capable WLAN baseband, and RF in a single chip.

FSC-BW126B provides a complete solution for high-performance integrated wireless and Bluetooth devices. Its base band implements Multi-user Multiple Input, Multiple Output (MU-MIMO) Orthogonal Frequency Division Multiplexing (OFDM) with two transmit and two receive paths (2T2R).

Moreover, FSC-BW126B provides one spatial stream space-time block code (STBC), Transmit Beamforming (TxBF) and Low Density Parity Check (LDPC) to extend the range of transmission.


  • IEEE 802.11ac compliant
  • CMOS MAC, Baseband PHY and RF in a single chip for IEEE 802.11a/b/g/n/ac/ax compatible WLAN
  • Support 802.11ac 2x2, Wave-2 compliant with RX MU-MIMO
  • Support 802.11ax 2x2, with OFDMA and MU-MIMO by 4 types PPDU format, such as HE-SU-PPDU, HE-ER-SU-PPDU, HE-MU-PPDU, and HE-TB-PPDU
  • Maximum PHY data rate up to 286.8 Mbps using 20MHz bandwidth, 573.5Mbps using 40MHz bandwidth, and 1201Mbps using 80MHz bandwidth
  • Backward compatible with 802.11a/b/g devices while operating at 802.11n data rates
  • Backward compatible with 802.11a/n/ac devices while operating at 802.11ax data rates


Bluetooth & Wi-Fi Combo ModuleFSC-BW126B
Bluetooth VersionBluetooth 5.2 Dual-Mode
ChipsetSilicon Labs EFR32BG21
Dimension22mm * 22mm * 2.4mm
Maximum Transmit Power12dBm
Power supplyVBAT 3.3V, VDDIO 1.8V/3.3V
ProfilesSupport HFP, A2DP, AVRCP, PBAP, SPP, MAP, DUN, PAN, FTP, GATT and etc. (when Feasycom Bluetooth stack running in host platform)
Operating Temperature-40°C to +85°C
Storage Temperature-40°C to +85°C


  • Car audio and video system
  • Measurement systems
  • PND
Dimensions22 × 22 × 2.4 mm


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FSC-BW126B Silicon Labs EFR32BG21 Dual-Mode Bluetooth 5.2 & Dual-Band Wi-Fi 6 Module
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