Document Number: MC33811

Rev. 3, 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. All rights reserved.

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

Figure 1. 33811 Simplified Application Diagram

SOLENOID MONITOR

EG SUFFIX (PB_FREE)

98ASB42567B

16-PIN SOICW

33811

ORDERING INFORMATION

Device

Temperature

Package

MCZ33811EG/R2

-40°C to 125°C

16 SOICW

VDD

SI

SO

SCLK

CS

MOSI

MISO

SCLK

CS

SOLM5

MCU

VSPI

RESET

33811

D_GND

SOLENOID DRIVER

OUT1

OUT2

OUT3

OUT4

OUT5

VPWR

VDD

SOLENOIDS

SOLM4

SOLM3

SOLM1

IN1

IN2

IN3

IN4

IN5

PORTS

P00

P01

P02

P05

P04

P03

A_GND

SOLM2