Document Number: MC33996

Rev. 6.0, 6/2007

Freescale Semiconductor

Advance Information

* This document contains certain information on a new product.

Specifications and information herein are subject to change without notice.

© Freescale Semiconductor, Inc., 2007. All rights reserved.

16-Output Switch with SPI

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)

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 V and 5.0 V CMOS logic levels. The 33996,

in effect, serves as a bus expander and buffer with fault management

features that reduce the MCU’s fault management burden.

Features

• 24-Bit SPI for Control and Fault Reporting, 3.3 V/5.0 V Compatible

• Outputs Are Current Limited (0.9 A to 2.5 A) to Drive Incandescent

Lamps

• Output Voltage Clamp of +50 V During Inductive Switching

• On/Off Control of Open Load Detect Current (LED Application)

• Independent Overtemperature Protection

• Output Selectable for PWM Control

Detection

• Pb-Free Packaging Designated by Suffix Code EK

Figure 1. 33996 Simplified Application Diagram

LOW SIDE SWITCH

33996

ORDERING INFORMATION

Device

Temperature

Package

MC33996EK/R2

-40°C to 125°C

32 SOICW-EP

MCZ33996EK/R2

EK SUFFIX (PB-FREE)

98ARL10543D

32-PIN SOICW EXPOSED PAD

VPWR

MCU

33996

LED

Lamp

Solenoid/Relay

Vdd

3.3 V/5.0 V

VDD

VPWR

GND

OUT15

OUT0

OUT1

OUT2

OUT3

OUT4

OUT5

OUT6

OUT7

OUT8

OUT9

OUT10

OUT11

OUT12

OUT13

OUT14

VBAT

SOPWR

SO

MOSI

PWM

PWM

SI

MISO

CS

CS

SCLK

SCLK

RST

RST

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