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technical information
●Application note
●Sample software for evaluation board
●Software programming manual

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Bluetooth Low Energy (5) Ultra-Low Current Single-Chip Controller


The TC35681 offers full Bluetooth 5.0 support and is compliant with the new high-speed features, 2M PHY and Coded PHY (500kbps and 125kbps) added to the Bluetooth 5.0 standard and supports all of the required data rates. Receiver sensitivity is an industry leading -105dBm at 125kbps, and a built-in high efficiency power amplifier in the transmission block delivers up to +8dBm transmission power. All these features enable long range communication with low current consumption.  TC35681 has no built-in Flash ROM and operates in combination with an external non-volatile memory or host processor.  A wide operating range of -40° to +125°C makes it suitable for applications exposed to high temperatures. It supports both the HCI and GATT profiles, including server and client functions, central and peripheral functions.
The TC35681IFTG version will also feature a 6mm x 6mm QFN40 wettable flank package and AEC-Q100 certification making this highly expandable devices suitable for Automotive applications.

Key Benefits

  • Flexible system architectures through:
    • Embedded Bluetooth profile model (API over host UART)
  • Bluetooth qualified embedded Bluetooth low energy stack and GATT profile for easy Bluetooth product qualification
  • Ultra-low bill of materials due to very few external components:
    • System integration is simplified by various on-chip peripherals
    • Integrated frequency adjustment capacitance
    • Balun, LNA, Switch and the majority of the matching circuit is integrated
  • Supports over-the-air (OTA) update of system software
  • The device can operate at voltages between 1.8V and 3.6V making it suitable for use with various battery types such as coin cell, AAA, or AA
  • Auto Advertise Circuit allows the advertising function without CPU wake-up and interaction
  • Various sleep modes and clock options to optimize power consumption
  • Supports a multiple number of simultaneous master/slave connections
  • QFN40 package allows small and cheap form factor designs and easy soldering and test.  Wettable flank package to simplify automatic visual inspection for production testing

TC35681 Features

  • Bluetooth Low Energy (5.0) compliant
  • Supports Bluetooth low energy GAP central and peripheral mode
  • Internal RAM for application code, data patches
  • On-chip balun, antenna switch, LNA, DC-DC converter or LDO
  • Integrated oscillator feedback circuit
  • CortexM0 CPU with up to 32MHz integrated
  • Operational Voltage: 1.8V to 3.6V
  • Auto Advertise Function
  • BLE TX peak power consumption: 11.0mA (@8dBm)
  • BLE RX peak power consumption: 5.1mA
  • Deep sleep mode: 50nA (@3.0V)
  • Transmitter Output Power: +8dBm to -40dBm (+8, +7, +6, +4, 0, -6, -20, -40dBm)
  • RX Sensitivity: (1Mbps): -95.6dBm*, (125Kbps): -105.2dBm*
  • Operating Temperature Range: -40°C to 125°C
  • Package: 40pin QFN 5mm x 5mm 0.4 mm pitch
  • Profiles: High Level API access to embedded GATT (Generic Attribute Profile) and SM (Security Manager)
  • Interfaces: UART (2 channels), SPI (2 channels), I2C (2 channels), PWM output (4 channels), ADC (5 channels), GPIO (18 ports)
  • Single Wire Debug (SWD) interface
*Packet size of 37 octets

Further Information

The Bluetooth® word mark and logos are registered trademarks owned by Bluetooth SIG, Inc.

ARM and Cortex are registered trademarks of ARM Limited (or its subsidiaries) in the EU and/or elsewhere.

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·Before creating and producing designs and using, customers must also refer to and comply with the latest versions of all relevant TOSHIBA information and the instructions for the application that Product will be used with or for.