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Freescale Semiconductor
Advance Information
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 and 5.0V 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
? Designed to operate 5.0V < V PWR < 27V
? 24 Bit SPI for control and fault reporting, 3.3/5.0V compatible
? Outputs are current limited (0.9 to 2.5A) to drive incandescent
lamps
? Output voltage clamp of +50V during inductive switching
? On/Off control of open load detect current (LED application)
? V PWR standby current < 10 μ A
Document Number: MC33996
Rev. 8.0, 8/2008
33996
LOW SIDE SWITCH
EK SUFFIX (PB-FREE)
98ARL10543D
32-PIN SOICW EXPOSED PAD
ORDERING INFORMATION
? R DS(ON) of 0.55 Ω at 25°C typical
? Independent over-temperature protection
? Output selectable for PWM control
? Output ON short-to-V BAT and off short-to-ground /open detection
? Pb-free packaging designated by suffix code EK
Device
MC33996EK/R2
MCZ33996EK/R2
Temperature
Range (T A )
-40°C to 125°C
Package
32 SOICW-EP
VDD
Vdd
3.3 V/5.0 V
33996
SOPWR
VPWR
VPWR
VBAT
MCU
SCLK
SCLK
OUT0
CS
MISO
MOSI
PWM
RST
CS
SI
SO
PWM
RST
OUT1
OUT2
OUT3
OUT4
OUT5
OUT6
Solenoid/Relay
OUT7
OUT8
OUT9
OUT10
OUT11
OUT12
OUT13
OUT14
LED
OUT15
/8
Lamp
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.
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