“Designed for the smallest IoT devices, the xG27 family ranges in size from 2 to 5 mm square. They offer designers energy efficiency, performance, reliable security and wireless connectivity,” according to the company. Such as "connected medical devices, wearables, asset monitoring tags and simple consumer electronics like toothbrushes and toys.”
The BG27 family of microcontrollers have Bluetooth connectivity, while the MG27 microcontrollers support Zigbee. The smallest package is a 2.3 x 2.6mm wafer level chip scale.
Among the family, at least some devices get a DC-DC step-up converter so they can operate from as little as 0.8V, and another advance feature is a Coulomb counter to monitor battery level.
Security is provided by the TrustZone Cortex-M33, followed by Silicon Labs' 'protected storage' and 'virtual security system' (VSE) for secure boot, crash protection and fault protection, as well as "additional features designed to protect the device and its users" data from local and remote cyber threats," reports SiLabs.
In 'shelf mode' a power level is enabled which reduces consumption to <20nA для кінцевих пристроїв, які мають майже повну батарею після транспортування та зберігання.