BT680T, BLE 5 Module, Low Cost, Long Range, Automobile Temperature Available


BT680T, BT680TA (automobile temperature)


BT680K use Toshiba TC35681 SoCs. A host MCU controls module with HCI commands over UART interface. Or, user application can be stored in an external EEPROM for standalone operation. Bluetooth range is 3000 meters at 125 Kbps when measured in environments with Low Multiple Path Interference (LMPI),

Model Variants

BT680F Summary.png

BT680T: A host MCU send HCI commands over UART interface to control module. Automobile temperature components are used in BT680TA.

BT680F: User’s application is stored in on-board flash and loaded into on-board RAM at booting-up for standalone operation. Fanstel’s AT command code is preloaded for legacy MCUs to upgrade to Bluetooth 5 features and longer range. Or, user can load other application codes.

BT680E offers the same features as BT680F. An u.FL connector for external antenna is installed instead of the integrated PCB trace antenna in BT680F.

Bluetooth 5 Specifications

Three key features of Bluetooth 5 specs for Bluetooth 5 products:

  1. 2X bandwidth to support 2Mbps data rate.

  2. 4X range to provide coverage of an entire home or building.

  3. 8X broadcasting message length from 31 bytes to 255 bytes.

Bluetooth SIG CORE_v5.0 LE CODED PHY uses FEC (Forward Error Correction) codes, 8 or 2 symbols to represent 1 data bit, and 1 M Symbols per second (MSps) transmission rate. Effectively, the maximum data rate is 125 kbps when 8 symbols are used. This FEC coding allows receivers to receive much weaker signals and to increase range by 4 times.


  • Used with a host MCU by UART interface/HCI Commands.

  • External EEPROM is required for standalone operation

  • Bluetooth SIG certified BLE 5 stacks embedded in mask-ROM.

  • Toshiba SOC, built-in Cortex M0 processor

  • Masked-ROM: 240KB

  • RAM: 144KB

  • Flash: 0KB.

  • Bluetooth RF analog core, baseband digital core and integrated antenna

  • TX power: +8 dBm

  • Receiver sensitivity at 1Mbps: -95 dBm

  • Receiver sensitivity at 125 Kbps (coded PHY): -105 dBm

  • Size: 15x20.8x1.9mm

  • Bluetooth range: 3000 meters at 125 Kbps.

  • Bluetooth range: 750 meters at 1Mbps.

  • Secure connection

  • Bluetooth Low Energy (BLE) V5 GATT profile with OTA (Over The Air) support.

  • Up to 18 General Purpose IOs to be configured by firmware:

    • SPI interface, I2C interface

    • UART interface, 9600bps to 921.6 Kbps

    • Support for wake up interfaces

    • Up to 5 ADC channels (1 for internal monitoring of VDD).

    • Up to 4 PWM channels

  • On board 26 MHz main clock

  • External 32.768 kHz sleep clock

  • Operation voltage: 1.9V-3.6V

  • Peak current consumption, 11.5 mA, +8 dBm TX, 2 Mbps

  • deep sleep mode, <0.1uA

  • Integrated PCB trace antenna,

  • Operation Temperature: -40oC to +85oC

  • Hybrid Castellated and LGA, 40 pins: pins. Easier prototyping, easier production.

  • Integrated shield to resist EMI

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For volume discount and production lead time, please email Fanstel

BT680T, TC35681 Bluetooth 5 module
3.00 3.61

Long range TC35680 module, range 3000 meters at 125 Kbps..

$3.00 each

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BT680TA, TC35681 Bluetooth 5 module, automobile temperature range
from 6.92

Long range TC35680 module, range 3000 meters at 125 Kbps. Automobile temperature range.

$6.34 each for 10 pcs; $6.05 each for 100 pcs; $5.76 each for 1000 pcs.

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EV-BT680T, Evaluation board for BT680T and BT680TA

Evaluation board for BT680T, long range Bluetooth 5 module and BT680TA, automobile terperature

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