NXP Semiconductors Document Number: MC33879 Rev. 11.0, 7/2016 Technical Data Configurable octal serial switch with 33879 open load detect current disable 33879A 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- HIGH-SIDE/ LOW-SIDE SWITCH 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 circuits 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. Features Designed to operate 5.5 V < V < 27.5 V PWR EK SUFFIX (PB-FREE) 16-bit SPI for control and fault reporting, 3.3 V / 5.0 V compatible 98ARL10543D Outputs are current limited (0.6 to 1.2 A) to drive incandescent lamps 32-PIN SOICW 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) Applications Internal reverse battery protection on V PWR Solenoids Loss of ground or supply will not energize loads or damage IC Relays Maximum 5.0 A I standby current at 13 V V PWR PWR Actuators R of 0.75 at 25 C typical DS(ON) Stepper motors Short-circuit detect and current limit with automatic retry Brush DC motors Independent overtemperature protection Incandescent lamps V V PWR BAT 5.0 V 33879 VPWR D1 D2 VDD D3 D4 High-side Drive S1 MCU S2 A0 EN S3 S4 MOSI DI H-Bridge Configuration M SCLK SCLK V V D5 BAT CS BAT CS D6 MISO D0 D7 PWM1 IN5 D8 S5 Low-side Drive PWM2 IN6 S6 GND S7 S8 Figure 1. 33879 simplified application diagram 2016 NXP B.V.1 Orderable parts Table 1. Orderable part variations (1) Part number Temperature (T ) Package A MC33879APEK -40 to 125 C 32 SOICW-EP MC33879TEK Notes 1. To order parts in Tape & Reel, add the R2 suffix to the part number. Table 2. Device variations Symbol Characteristic Min. Typ. Max. Unit V Supply Voltage PWR V -16 40 V 33879 PWR 33879A -16 45 Output Fault Detection Current Threshold, High-side Configuration Outputs Programmed OFF I A OUT(FLT-TH) 35 55 90 33879 35 55 150 33879A Output OFF Open Load Detection Current, High-side Configuration VDRAIN = 16 V, VSOURCE = 0 V, Outputs Programmed OFF, I A OCO VPWR = 16 V 65 100 160 33879 60 100 190 33879A Output OFF Open Load Detection Current, Low-side Configuration VDRAIN = 16 V, VSOURCE = 0 V, Outputs Programmed OFF, I A OCO VPWR =16 V 40 75 135 333879 40 75 150 338979A EN Pull-down Current EN = 5.0 V I A EN 20 45 100 333879 20 45 110 33879A Output Fault Detection Voltage Threshold Outputs Programmed OFF V V OUT(FLT-TH) 2.5 4.0 4.5 33879 2.5 4.0 5.0 33879A Output Fault Detection Current Threshold, Low-side Configuration Outputs Programmed OFF I A OUT(FLT-TH) 20 30 60 33879 20 30 115 33879A 33879 2 NXP Semiconductors