S12 MagniV® Mixed-Signal Microcontrollers NXP Semiconductors S12 MagniV® Family of Mixed-Signal Microcontrollers includes single-die solutions designed to provide a comprehensive system-in-package (SiP) built on proven S12 technology. With the integration of high-voltage (HV) analog features into a standard automotive MCU, the S12 MagniV family simplifies system design by helping to improve manufacturing efficiency and reduce bill of materials costs.