Document Number: MC33811
Rev. 3, 8/2008
Freescale Semiconductor
Advance Information
Solenoid Monitor Integrated
Circuit (IC)
33811
The 33811 is a 5 channel Solenoid Monitor IC that is used to verify
proper electrical and mechanical solenoid operation. The IC contains
five solenoid driver voltage monitoring stages and a serial peripheral
interface (SPI) for fault communication and setup. The IC has the
ability to determine the correct movement of solenoid armatures by
analyzing the variation in the voltage profile, across the solenoid
driver MOSFET, which represents the actual solenoid current profile.
SOLENOID MONITOR
These features, along with cost effective packaging, make the
33811 ideal for powertrain solenoid monitoring applications.
Features
EG SUFFIX (PB_FREE)
98ASB42567B
• Typical operating voltage range, 10.5 < VPWR < 15.5 volts
• Interfaces to 3.3 and 5 volt microprocessors via SPI protocol
• Reset pin to initialize all 5 fault outputs
• Internal voltage regulator
16-PIN SOICW
• Internal oscillator
ORDERING INFORMATION
• Unique solenoid current profile detection circuitry
• Pb-free packaging designated by suffix code EG
Temperature
Package
Device
Range (T )
A
MCZ33811EG/R2
-40°C to 125°C
16 SOICW
33811
VBAT
VPWR
VDD
VDD
VSPI
SOLM1
SOLM2
SOLM3
SOLM4
SOLM5
MCU
SI
MOSI
SCLK
CS
SCLK
CS
SO
MISO
D_GND
A_GND
RESET
P00
SOLENOIDS
V
BAT
SOLENOID DRIVER
IN1
IN2
IN3
IN4
IN5
OUT1
OUT2
OUT3
OUT4
OUT5
P01
P02
V
PORTS
BAT
BAT
BAT
BAT
V
P03
V
V
P04
P05
Figure 1. 33811 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. All rights reserved.