Freescale Semiconductor, Inc. reserves the right to change the detail specifications,

as may be required, to permit improvements in the design of its products.

Document Number: MC33287

Rev. 5.0, 2/2007

Freescale Semiconductor

Technical Data

© Freescale Semiconductor, Inc., 2007. All rights reserved.

Contact Monitoring and Dual

Low-Side Protected Driver

The 33287 interfaces between switch contacts and a

microcontroller. Eight switch-to-battery (or switch-to-ground) sense

monitor switch status. Additionally, two internal low-side switches are

available to control inductive or capacitive loads.

The 33287 has eight sense inputs (rated at 40 V) with thresholds

interfacing to the MCU and the remaining seven inputs are

multiplexed interfaced to the MCU.

The two low-side switch outputs are current limited to 535 mA and

internally clamped to 50 V. Outputs also have independent

overtemperature shutdown and diagnostic reporting.

Features

• Eight High-Voltage Sense Inputs

• Direct Interfacing to Microcontroller

• Two Current Limited Low-Side Drivers

• Drivers Internally Overvoltage Clamped and Thermally

Protected

• 55 µA Standby Current

• Pb-Free Packaging Designated by Suffix Code EG

Figure 1. Simplified Application Design

AUTOMOTIVE CONTACT MONITORING AND

DUAL LOW-SIDE PROTECTED DRIVER

DW SUFFIX

EG SUFFIX (PB-FREE)

98ASB42343B

20-PIN SOICW

33287

ORDERING INFORMATION

Device

Temperature

Package

MC33287DW/R2

-40 to 125°C

20 SOICW

MCZ33287EG/R2

8 Sense

to GND

Inputs

GND Sense

33287

5.0 V

VDD

MCU

VDD1

OUTD2

OUTD1

IN7

IN6

IN5

IN4

IN3

IN2

IN1

IN0

GND

CD1

OUT7

OUT1

AD2

AD1

AD0

VDD2

CD2