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Teilenummer | 33287 |
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Beschreibung | Contact Monitoring and Dual Low-Side Protected Driver | |
Hersteller | Freescale Semiconductor | |
Logo | ||
Gesamt 15 Seiten Freescale Semiconductor
Technical Data
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.
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
Document Number: MC33287
Rev. 5.0, 2/2007
33287
AUTOMOTIVE CONTACT MONITORING AND
DUAL LOW-SIDE PROTECTED DRIVER
DW SUFFIX
EG SUFFIX (PB-FREE)
98ASB42343B
20-PIN SOICW
ORDERING INFORMATION
Device
Temperature
Range (TA)
Package
MC33287DW/R2
MCZ33287EG/R2
-40 to 125°C
20 SOICW
www.DataSheet4U.com
VBAT
8 Sense
to GND
or VBAT
Inputs
VBAT Sense
GND Sense
33287
5.0 V
VDD1
IN0
IN1
IN2
IN3
IN4
IN5
IN6
IN7
OUTD1
OUTD2
VDD2
AD0
AD1
AD2
OUT1
OUT7
CD1
CD2
GND
VDD
MCU
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.
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. STATIC ELECTRICAL CHARACTERISTICS (continued)
Characteristics noted under conditions 7.0 V ≤ VDD1 ≤ 18 V, 4.75 V ≤ VDD2 ≤ 5.25 V, -40°C ≤ TA ≤ 125°C, unless otherwise
noted. Extended limit is 5.0 V ≤ VDD1 ≤ 7.0 V and other parameters are full specification in this mode. Inputs IN1–IN7 and low-
side drivers are still functional with down-graded characteristics.
Characteristic
Symbol
Min
Typ
Max Unit
INPUTS (IN0 TO IN7 PINS)
Input Voltage Low (Full Specification)
Input Voltage Low (Extended Limit)
Input Voltage High (Full Specification and Extended Limit)
Hysteresis (5.0 V < VDD1 < 16 V)
Input Current (VIN < 16 V)
Input Voltage Clamp (I = 100 µA)
INPUTS (AD0, AD1, AND AD2 PINS)
Input Voltage Low
Input Voltage High
Hysteresis
Input Current
OUTPUTS (OUT1 AND OUT7 PINS)
Output Voltage Low (ILOAD = 2.0 mA)
Output Voltage High (ILOAD = -2.0 mA)
VIL — — 4.0 x VDD1 V
VIL — — 3.0 x VDD1 V
VIH
7.0 x VDD1
—
—V
VHYS
5.0 1.0
—V
ILEAK 5.0 — 5.0 µA
VINCLAMP
17
20
23 V
VIL
VIH
VHYS
ILEAK
— — 4.0 x VDD2 V
8.0 x VDD2
—
—V
500 750
— mV
-5.0 — 5.0 µA
VOL
VOH
— — 2.0 x VDD2 V
8.0 x VDD2
—
—V
33287
6
Analog Integrated Circuit Device Data
Freescale Semiconductor
6 Page FUNCTIONAL DEVICE OPERATION
LOGIC COMMANDS AND REGISTERS
IN0 IN1 IN2 IN3 IN4 IN5 IN6 IN7
VALIM
AD2
AD1
AD0
8 TO 1 LOGIC MULTIPLEXER
VDD2
All the symbols represented
without supply pin are
connected to VDD2
VDD1
DIAGD1
NQ Q
RS
OUT7
OUTi
GND
VALIM
VDD2
VALIM
DIAGD2
OUTD2
CD2
VDD2
S Q VALIM
R
+
-
OUTD2 Driver
CD1
OUTD1 Driver
OUTD1
NOTE: The only difference between the low side driver 1 and 2 is the polarity of the command. Also, there is an integral pull-up at
pin CD1, and an internal pull-down at pin CD2.
33287
12
Figure 8. Electrical Schematic
Analog Integrated Circuit Device Data
Freescale Semiconductor
12 Page | ||
Seiten | Gesamt 15 Seiten | |
PDF Download | [ 33287 Schematic.PDF ] |
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