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Document Number: MC33996
Rev. 8.0, 8/2008
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., 2007-2008. 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 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 < 10μA
•R
DS(ON)
of 0.55Ω 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
Figure 1. 33996 Simplified Application Diagram
LOW SIDE SWITCH
33996
ORDERING INFORMATION
Device
Temperature
Range (T
A
)
Package
MC33996EK/R2
-40°C to 125°C 32 SOICW-EP
MCZ33996EK/R2
EK SUFFIX (PB-FREE)
98ARL10543D
32-PIN SOICW EXPOSED PAD
V
PWR
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
V
BAT
SOPWR
SOMOSI
PWMPWM
SIMISO
CSCS
SCLKSCLK
RSTRST
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