The NCN6010 is a level shifter analog circuit designed to translate the voltages between a SIM Card and an external microcontroller. A builtin DC/DC converter makes the NCN6010 useable to drive any type of SIM card. The device fulfills the GSM 11.11 specification. The external MPU has an access to a dedicated input STOP pin, providing a way to switch off the power applied to the SIM card in case of failure or when the card is removed.