The U6268B is an interface IC for remote automotive sensors. It links the crash sensors in the driver and passenger door with the main airbag unit in the dashboard. Two identical channels supply the external sensors and receive digital information from them via one active wire each. The interface supplies the external sensors with a preregulated smoothed voltage, the external units transmit the digital information back to the interface by current modulation. As the device is designed for safety-critical applications, the highest data transmission security is mandatory. With high immunity against cross coupling between the two channels, the U6268B is tailored for the harsh automotive environment.