Document Number: MC33996 Freescale Semiconductor Rev. 8.0, 8/2008 Advance Information 16 Output Switch with SPI 33996 Control The 33996 is a 16-output low side switch with a 24-bit serial input control. It is designed for a variety of applications including inductive, incandescent, and LED loads. The Serial Peripheral Interface (SPI) LOW SIDE SWITCH provides both input control and diagnostic readout. A Pulse Width Modulation (PWM) control input is provided for pulse width modulation of multiple outputs at the same duty cycle. A dedicated reset input provides the ability to clear all internal registers and turn all outputs off. The 33996 directly interfaces with micro controllers and is compatible with both 3.3 and 5.0V CMOS logic levels. The 33996, in effect, serves as a bus expander and buffer with fault management features that reduce the MCUs fault management burden. Features Designed to operate 5.0V < V < 27V PWR 24 Bit SPI for control and fault reporting, 3.3/5.0V compatible EK SUFFIX (PB-FREE) 98ARL10543D Outputs are current limited (0.9 to 2.5A) to drive incandescent 32-PIN SOICW EXPOSED PAD lamps Output voltage clamp of +50V during inductive switching On/Off control of open load detect current (LED application) V standby current < 10A ORDERING INFORMATION PWR R of 0.55 at 25C typical DS(ON) Temperature Device Package Independent over-temperature protection Range (T ) A Output selectable for PWM control MC33996EK/R2 Output ON short-to-V and off short-to-ground /open detection BAT -40C to 125C 32 SOICW-EP MCZ33996EK/R2 Pb-free packaging designated by suffix code EK Vdd V V PWR BAT 3.3 V/5.0 V 33996 VDD SOPWR VPWR MCU SCLK SCLK OUT0 OUT1 CS CS Solenoid/Relay OUT2 MISO SI OUT3 MOSI SO OUT4 PWM PWM OUT5 RST RST OUT6 OUT7 OUT8 LED OUT9 OUT10 OUT11 OUT12 OUT13 OUT14 OUT15 Lamp /8 GND Figure 1. 33996 Simplified Application Diagram * This document contains certain information on a new product. Specifications and information herein are subject to change without notice. Freescale Semiconductor, Inc., 2007-2008. All rights reserved.IINTERNAL BLOCK DIAGRAM IINTERNAL BLOCK DIAGRAM VPWR OUT0 Over-voltage Voltage V V DD DD Detect 50V Regulator Bias OVD GE PWM OT V Gate DD SF 10A Control RB OF To Gates OUT1-15 RST SFPDB 1 to 15 25A SFL CS V Ref 10A CS Open SCLK Input Load I SI Limit Buffers Detect SO SCLK R Enable S 50A CSI 10A CSBI SI Short and Open GND (8) 10 A SPI Load Interface Detect Serial D/O SO Logic Line Driver Over-temperature Detect SOPWR From Detectors 1 to 15 Figure 2. 33996 Simplified Internal Block Diagram 33996 Analog Integrated Circuit Device Data 2 Freescale Semiconductor