Texas Instruments RF430F5978 System in Package adds a 3D low frequency (LF) wake-up and transponder interface to the CC430 ultra-low-power microcontroller system-on-chip (SoC) with integrated sub-1-GHz RF transceiver. This architecture allows activation and de-activation of the device in a dedicated and well-defined area “on-demand” to achieve extended battery life for the whole system. The embedded LF transponder interface is always functional even without battery supply and offers the highest level of security through its 128-bit AES encryption for challenge/response and mutual authentication, and it also adds 2kB of programmable EEPROM memory to the system. The CC430 ultra-low-power microcontroller system-on-chip (SoC) combines the CC1101 sub-1-GHz RF transceiver with the powerful MSP430™ 16-bit RISC CPU. 16-bit registers and constant generators contribute to maximum code efficiency. It features the MSP430 CPUXV2, 32kB of in-system programmable flash memory, 4kB of RAM, two 16-bit timers, a high-performance 12-bit analog-to-digital (A/D) converter with six external inputs plus internal temperature and battery sensors, comparator, universal serial communication interfaces (USCI), 128-bit AES security accelerator, hardware multiplier, DMA, real-time clock module with alarm capabilities. The RF430F5978 provides a tight integration between the microcontroller core, its peripherals, software, and the integrated sub-1-GHz RF transceiver and 3D LF transceiver for wake-up and transponder interface, making these solutions easy to use while improving performance.