Toshiba Electronic Devices & Storage Corporation Introduces New Bluetooth® low energy IC for Automotive Applications

December 6, 2017

Toshiba Electronic Devices & Storage Corporation

Highly expandable and integrated device will be fully AEC-Q100 qualified


TOKYO—Toshiba Electronic Devices & Storage Corporation has announced a new IC that is compliant with Bluetooth® low energy (LE) [1] core specification 4.2 including support for secure connection, LE privacy features and extended packet length support. It is available for use in harsh automotive environments and extended temperature ranges. The mixed-signal TC35679IFTG contains both analog RF and baseband digital parts to provide a complete solution in a single, compact and low-profile, 40-pin 6mm x 6mm x 1mm QFN ‘wettable flank’ package, with a pin pitch of 0.5mm.

The TC35679IFTG provides Bluetooth® Host Control Interface (HCI) functions alongside low energy GATT profile functions (as defined by Bluetooth®) specifications. The new IC becomes a fully-fledged application processor when used in conjunction with an external non-volatile memory, or can be used in combination with an external host processor.

The highly integrated device is based on an Arm® Cortex®-M0 processor and includes a sizeable 384KB of on-board mask ROM to support the Bluetooth® baseband process and a further 192KB of on-board RAM for Bluetooth® application programs and data.

A key feature of the TC35679IFTG is its ability to form part of sophisticated systems as a result of 17 General Purpose IO (GPIO) lines and multiple communications options including SPI, I2C and a 921.6kbps, two-channel UART. The GPIO lines offer access to a range of on-chip features including a wake-up interface, four-channel PWM interface, 6-channel AD converter and the ability to control the control interface of an optional external power amplifier for applications requiring a longer reach. On chip DC-DC converter or LDO circuits adjust the external voltage supply to the required values on chip.

Designed for compliance with AEC-Q100[2], the low energy IC is primarily intended to be used in automotive applications. The wettable flank package simplifies automatic visual inspection needed to deliver the high levels of soldering quality required to withstand vibration experienced in automotive applications.

Current applications include remote key systems and reducing cables by providing a reliable wireless connection to sensors. The device will also facilitate remote connection to diagnostic equipment, creating a Bluetooth® 'soft' On-Board Diagnostic (OBD) port, thereby saving the cost and weight of the associated cabling and OBD connector.

The TC35679 accepts a wide range of supply voltages (1.8-3.6V) making it suitable for automotive applications. Operating temperature range is -40˚C to 105˚C for input voltages from 2.7V to 3.6V and -40˚C to 85˚C from 1.8V to 3.6V.

Key Features

  • Low power consumption:
        3.3 mA (Transmitter operation @3.0 V, Output Power : 0 dBm)
        3.3 mA (Receiver operation @3.0 V)
        Less than 100nA in deep sleep (@3.0V)
  • Receiver sensitivity: -93 dBm
  • Supports Bluetooth® LE Ver.4.2 central and peripheral devices
  • GATT (Generic Attribute Profile) built in
  • Supports servers and client functions defined by GATT
  • Wettable flank package
  • AEC-Q100 compliant[2]


Bluetooth® low energy communication devices for automotive and industrial applications.

Main Specifications

Part Number
Operating voltage range 1.8V to 3.6V
Current consumption in TX operation 3.3 mA (@3.0 V, Output Power : 0 dBm )
Current consumption in RX operation 3.3 mA (@3.0V)
Current consumption in deep sleep Less than 100nA (@3.0V)
Operating temperature range -40℃ to 85 ℃ (1.8 to 3.6V)
-40℃ to 105 ℃ (2.7 to 3.6V)
Package QFN40 6 mm x 6 mm 0.5 mm pitch, wettable flank
Wireless Communication Bluetooth® low energy Ver.4.2
Including central and peripheral functions
CPU Arm® Cortex®-M0
Transmitter output power 0 dBm to -20 dBm (4 dB steps)
Receiver sensitivity -93.0 dBm
Profiles HCI, GATT (Generic Attribute Profile), including server and client functions
Interfaces UART, I2C, SPI, GPIO
Other features DC-DC Converter
Low drop regulator
General purpose ADC
User program function
Wake up signal for host device
PWM function


[1]: Low power consumption communication technology defined in Bluetooth® Ver.4.2.

[2]: Qualification is expected by the end of the year.

*The Bluetooth® word mark and logos are registered trademarks owned by the Bluetooth SIG, Inc. and any use of such marks by Toshiba is under license. Other trademarks and trade names are those of their respective owners.”

*Arm and Cortex are registered trademarks of Arm Limited (or its subsidiaries) in the US and/or elsewhere.

For more information about the new product, please visit:

Customer Inquiries:

Mixed Signal IC Sales and Marketing Department

Tel: +81-44-548-2876

*Information in this document, including product prices and specifications, content of services and contact information, is current on the date of the announcement but is subject to change without prior notice.