NXP Semiconductors makes chips used primarily in automotive electronics, along with industrial equipment, mobile devices and communications infrastructure, with automotive representing the largest single share of its revenue. Its automotive chips handle functions like engine control, infotainment systems and increasingly the sensors and processing needed for driver assistance and autonomous driving features, a category that has grown as vehicles have become more electronically complex. NXP's revenue tends to track auto production volumes and the pace at which automakers add more electronic content per vehicle, both of which have generally trended upward over time even when overall car sales are flat. The company also makes secure identification and payment chips used in things like passports, transit cards and mobile payment systems, a smaller but distinct business from its core automotive and industrial semiconductor operations.