The 33689 is a SPI-controlled System Basis Chip (SBC) that combines many frequently used functions in an MCU-based system plus a Local Interconnect Network (LIN) transceiver. Applications include power window, mirror, and seat controls. The 33689 has a 5.0 V, 50 mA low dropout regulator with full protection and reporting features. The device provide full SPI-readable diagnostics and a selectable timing watchdog for detecting errant operation. The LIN transceiver waveshaping circuitry can be disabled for higher data rates. One 50 mA and two 150 mA high-side switches with output protection are available to drive inductive or resistive loads. The 150 mA switches can be pulse-width modulated (PWM). Two high-voltage inputs are available for contact monitoring or as external wake-up inputs. A current sense operational amplifier is available for load current monitoring. The 33689 has three operational modes: Normal (all functions available) Sleep (VDD OFF, wake-up via LIN bus or wake-up inputs) Stop (VDD ON, wake-up via MCU, LIN bus, or wake-up inputs)