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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 With Built-In Flash ROM


The TC35680 offers full Bluetooth 5.0 support and includes 128KB of embedded flash memory.  The IC supports extended low energy advertising, New Channel Selection Algorithm #2 and long range communication.  TC35680 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.  TC35680 incorporates a 256kB Mask ROM that supports the Bluetooth baseband process, and 144kB of RAM for processing Bluetooth application programs and data. It supports both the HCI and GATT profiles, including server and client functions, central and peripheral functions.

Key Benefits

  • Flexible system architectures through:
    • Embedded Bluetooth profile model (API over host UART)
    • Stand alone model (with embedded Bluetooth stack and profile, no host needed)
  • 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:
    • No external memory is needed, on-chip Flash and RAM stores small to medium size application code and data
    • 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 1.9V 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

TC35680 Features

  • Bluetooth Low Energy (5.0) compliant
  • Supports Bluetooth low energy GAP central and peripheral mode
  • Embedded 128KB Flash Memory and 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: 1.9V 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: -94.5dBm (at 1Mbps), -105dBm (at 125kbps)
  • Operating Temperature Range: -40°C to 85°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

Further Information

TC35680 Datasheets Altro

Bluetooth® Testing

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

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