The NXP® MC33999 is a 16-output low-side switch with a 24-bit serial input control, designed for a variety of applications including inductive, incandescent, and LED loads. * The SPI provides both input control and diagnostic readout * Eight parallel inputs are also provided for direct PWM control of 8 dedicated outputs * An output programmable PWM input provides PWM of any combination of outputs * A dedicated reset input provides the ability to clear all internal registers and turn all outputs off * Interfaces with MCUs and compatible with both 3.3 V and 5 V CMOS logic levels * Serves as a bus expander and buffer with fault management features, reducing the MCU fault management burden