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 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.
• Eight High-Voltage Sense Inputs
• Direct Interfacing to Microcontroller
• Two Current Limited Low-Side Drivers
• Drivers Internally Overvoltage Clamped and Thermally
• 55 µA Standby Current
• Pb-Free Packaging Designated by Suffix Code EG
Document Number: MC33287
Rev. 5.0, 2/2007
AUTOMOTIVE CONTACT MONITORING AND
DUAL LOW-SIDE PROTECTED DRIVER
EG SUFFIX (PB-FREE)
-40 to 125°C
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.