The TC35679FSG from Toshiba is a IC for Bluetooth smart devices with a very low current consumption. It is a mask-ROM-based product with no built-in Flash ROM and can achieve extremely low current operation by reducing current consumption that would be used for access to Flash ROM. It is well-suited for applications with external host MCUs, and supports external EEPROM over an I2C interface to support standalone mode. It can achieve long operating times for applications powered by small coin batteries. For example, using a CR2032 type coin battery, the new IC can carry out beacon operation for more than a year. It requires a 1.8 to 3.6 V supply and draws only 3.6 mA of current in tx/rx modes.