Document Number: MC33287
Rev. 5.0, 2/2007
Freescale Semiconductor
Technical Data
Contact Monitoring and Dual
Low-Side Protected Driver
33287
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.
AUTOMOTIVE CONTACT MONITORING AND
DUAL LOW-SIDE PROTECTED DRIVER
The 33287 has eight sense inputs (rated at 40 V) with thresholds
ratiometric to VBAT. One sense input has a dedicated output for direct
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.
DW SUFFIX
EG SUFFIX (PB-FREE)
98ASB42343B
Features
20-PIN SOICW
•
•
•
•
Eight High-Voltage Sense Inputs
Direct Interfacing to Microcontroller
Two Current Limited Low-Side Drivers
Drivers Internally Overvoltage Clamped and Thermally
Protected
ORDERING INFORMATION
Temperature
Device
Package
Range (T )
A
•
•
55 µA Standby Current
Pb-Free Packaging Designated by Suffix Code EG
MC33287DW/R2
MCZ33287EG/R2
-40 to 125°C
20 SOICW
GND Sense
5.0 V
33287
VBAT
VDD1
VDD2
VDD
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
AD0
AD1
8 Sense
to GND
or VBAT
AD2
MCU
Inputs
OUT1
OUT7
CD1
OUTD1
OUTD2
CD2
GND
V
BAT Sense
Figure 1. Simplified Application Design
Freescale Semiconductor, Inc. reserves the right to change the detail specifications,
as may be required, to permit improvements in the design of its products.
© Freescale Semiconductor, Inc., 2007. All rights reserved.