MC33879

MC33879 Configurable Octal Serial Switch with Open Load Detect Current Disable Rev. 12.1 — 11 May 2023 Product data sheet 1 General description The 33879 device is an 8-output hardware configurable, high-side/low-side switch with 16-bit serial input control using the Serial Peripheral Interface (SPI). Two of the outputs may be controlled directly via a microcontroller for pulse-width modulation (PWM) applications. The 33879 incorporates SMARTMOS technology, with CMOS logic, bipolar/MOS analog circuitry, and DMOS power MOSFETs. The 33879 controls various inductive, incandescent, or LED loads by directly interfacing with a microcontroller. The circuit’s innovative monitoring and protection features include very low standby currents, cascade fault reporting, internal +45 V clamp voltage for low-side configuration, –20 V high-side configuration, output specific diagnostics, and independent overtemperature protection. 2 Features and benefits Designed to operate at 5.5 V < VPWR < 27.5 V 16-bit SPI for control and fault reporting, 3.3 V / 5.0 V compatible Outputs are current limited (0.6 A to 1.2 A) to drive incandescent lamps Output voltage clamp, + 45 V (low side) and –20 V (high side) during inductive switching On/Off control of open load detect current (LED application) Internal reverse battery protection on VPWR Loss of ground or supply will not energize loads or damage IC Maximum 5.0 µA IPWR standby current at 13 V VPWR RDS(ON) of 0.75 Ω at 25 °C typica...