Freescale Semiconductor
Technical Data
Document Number: MC33287
Rev. 5.0, 2/2007
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
ratiometric to V
BAT
. 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.
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
33287
AUTOMOTIVE CONTACT MONITORING AND
DUAL LOW-SIDE PROTECTED DRIVER
DW SUFFIX
EG SUFFIX (PB-FREE)
98ASB42343B
20-PIN SOICW
ORDERING INFORMATION
Device
MC33287DW/R2
-40 to 125°C
MCZ33287EG/R2
20 SOICW
Temperature
Range (T
A
)
Package
GND Sense
5.0 V
33287
V
BAT
VDD1
IN0
IN1
AD0
AD1
AD2
OUT1
OUT7
CD1
OUTD1
CD2
OUTD2
GND
MCU
VDD2
VDD
8 Sense
to GND
or V
BAT
Inputs
IN2
IN3
IN4
IN5
IN6
IN7
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.
FREESCALE [ FREESCALE SEMICONDUCTOR, INC ]
