33811 Datasheet, PDF (1/18 Pages) Freescale Semiconductor, Inc – Solenoid Monitor Integrated Circuit (IC)

Freescale Semiconductor
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Solenoid Monitor Integrated
Circuit (IC)
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.
These features, along with cost effective packaging, make the
33811 ideal for powertrain solenoid monitoring applications.
Features
• 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
• Internal oscillator
• Unique solenoid current profile detection circuitry
• Pb-free packaging designated by suffix code EG
Document Number: MC33811
Rev. 2.0, 9/2007
33811
SOLENOID MONITOR
EG SUFFIX (PB_FREE)
98ASB42567B
16-PIN SOICW
ORDERING INFORMATION
Device
PCZ33811EG/R2
Temperature
Range (T_A)
-40°C to 125°C
Package
16 SOICW
V_BAT
MCU
MOSI
SCLK
CS
MISO
P00
PORTS ^P01
P02
P03
P04
P05
VDD
33811
VPWR
VDD
VSPI
SI
SCLK
CS
SO
RESET
SOLM1
SOLM2
SOLM3
SOLM4
SOLM5
D_GND
A_GND
SOLENOID DRIVER
IN1
OUT1
V_BAT ^SOLENOIDS
V_BAT
IN2
OUT2
V_BAT
IN3
OUT3
IN4
OUT4
IN5
OUT5
V_BAT
V_BAT
Figure 1. 33811 Simplified Application Diagram
*This document contains certain information on a product under development. Free-
scale reserves the right to change or discontinue this product without notice
© Freescale Semiconductor, Inc., 2007. All rights reserved.