FSC-BT646 BLE 4.2 Programmable Module with 13dBm Maximum Output Power


The Feasycom FSC-BT646 is a Bluetooth Low Energy (BLE) 4.2 module with a 32-bit MCU microcontroller that can be used as an application processor as well as a data pump in fully hosted systems. It supports a wide range of applications from low-end, price sensitive designs to computing-intensive ones and provides advanced high-end features in economical products. Very low active RF, MCU current and low-power mode current consumption provide excellent battery lifetime and allow for operation on small coin cell batteries and in energy-harvesting applications. The BLE 4.2 firmware includes the L2CAP service layer protocols, Security Manager (SM), ATT, GATT and GAP.


  • 2.4GHz RF transceiver compatible with BLE 4.2
  • Low power consumption
  • Programmable TX power up to 13 dBm (Class 1)
  • Postage stamp sized form factor
  • Programmable baud-rate generator (baudrate can up to 921600 bps)
  • SRRC, FCC, CE and BQB certified


  • Health Thermometer
  • Heart Rate
  • Blood Pressure
  • Proximity
  • Human Interface Device (HID)


Bluetooth Module FSC-BT646
Bluetooth Standard BLE 4.2
Frequency Band 2.4G ISM band (2402~2480 MHz)
Transmit Output Power +13 dBm (Max.)
Receive Sensitivity -90 dBm (Typ.)
Profiles HID, ATT, GATT, GAP
Interfaces UART, GPIO, I2C, ADC, PWM
Size (mm) 13 × 26.9 × 2.0 (1.5mm pad pitch)
Power Supply 2.2~3.6V
Operating Temperature -40℃ to +85℃
Storage Temperature -40℃ to +125℃

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