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.
INTERNAL BLOCK DIAGRAM
INTERNAL BLOCK DIAGRAM
IN0
Internal
Supply
IN1
IN2
IN3
IN4
IN5
IN6
IN7
VDD2
VDD1
AD2
Multiplexer 8 to 1 and Diagnostic Logic
DIAGD1
DIAGD2
OUT7
AD1
OUT1
AD0
Fault Detector
OUTD1
Overtemperature
Fault Detector
Overtemperature
OUTD2
Detection
Control
Current
Limitation
V
DD2
Detection
Control
Current
Limitation
GND
CD1
CD2
Figure 2. 33287 Simplified Internal Block Diagram
33287
2
Analog Integrated Circuit Device Data
Freescale Semiconductor
PIN CONNECTIONS
PIN CONNECTIONS
VDD1
IN3
IN2
IN1
IN0
AD0
AD1
AD2
OUTD1
GND
1
2
3
4
5
6
7
8
9
10
20
19
18
17
16
15
14
13
12
11
VDD2
IN4
IN5
IN6
IN7
OUT7
OUT1
CD1
CD2
OUTD2
Figure 3. 33287 Pin Connections
Table 1. 33287 Pin Definitions
Pin Number Pin Name
1, 20
5, 4, 3, 2,
19, 18, 17,
16
6, 7, 8
9, 11
10
12, 13
14
15
V
DD1,
V
DD2
IN0 – IN7
Formal Name
Voltage Power
Input 0 – 7
Definition
These are high-voltage power supply 5.0 V pins (V
BAT
).
These are high-voltage input pins.
AD0 – AD2
OUTD1,
OUTD2
GND
CD1, CD2
OUT1
OUT7
Address
Output Drain
Ground
Command Driver
Output 1
Output 7
These pins are the addresses for mode and input selection.
These two are output driver pins (drain).
This pin in the ground for the logic and analog circuitry of the device.
These are the two driver command pins.
This is the output (multiplexed Output 1 = 0 to 6.0 V for IN0 to IN6 and DIAGD1 or
DIAGD2) and DIAGD2 pins.
This is the direct output from IN7 pin.
33287
Analog Integrated Circuit Device Data
Freescale Semiconductor
3
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
ELECTRICAL CHARACTERISTICS
MAXIMUM RATINGS
Table 2. MAXIMUM RATINGS
All voltages are with respect to ground unless otherwise noted.
Rating
Power Supply Voltage
Normal Operation (Steady-State)
Load Dump Conditions
Logic Supply Voltage (Continuous)
Input Pin Voltage
(1)
ESD Voltage
(2)
Symbol
V
DD1
Value
Unit
V
24
40
V
DD2
V
IN
V
ESD1
V
ESD2
T
A
T
STG
P
D
T
PPRT
R
θ
J-A
7.0
40
V
V
V
±2000
±200
-40 to 125°C
-65 to 150
0.7
Note 4.
100
°C
°C
W
°C
°C/W
Human Body Model
Machine Model
Operating Ambient Temperature
Storage Temperature
Power Dissipation (T
A
= 85°C)
Peak Package Reflow Temperature During Reflow
(3)
,
(4)
Thermal Resistance Junction-to-Ambient
Notes
1
With Serial Resistor
≥
25 kΩ
2
ESD1 testing is performed in accordance with the Human Body Model (C
ZAP
= 100 pF, R
ZAP
= 1500
Ω),
ESD2 testing is performed in
accordance with the Machine Model (C
ZAP
= 200 pF, R
ZAP
= 0
Ω).
3.
4.
Pin soldering temperature limit is for 10 seconds maximum duration. Not designed for immersion soldering. Exceeding these limits may
cause malfunction or permanent damage to the device.
Freescale’s Package Reflow capability meets Pb-free requirements for JEDEC standard J-STD-020C. For Peak Package Reflow
Temperature and Moisture Sensitivity Levels (MSL),
Go to www.freescale.com, search by part number [e.g. remove prefixes/suffixes and enter the core ID to view all orderable parts. (i.e.
MC33xxxD enter 33xxx), and review parametrics.
33287
4
Analog Integrated Circuit Device Data
Freescale Semiconductor
ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
STATIC ELECTRICAL CHARACTERISTICS
Table 3. STATIC ELECTRICAL CHARACTERISTICS
Characteristics noted under conditions 7.0 V
≤
V
DD1
≤
18 V, 4.75 V
≤
V
DD2
≤
5.25 V, -40°C
≤
T
A
≤
125°C, unless otherwise
noted. Extended limit is 5.0 V
≤
V
DD1
≤
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
SUPPLY VOLTAGE (V
DD1
AND V
DD2
PINS)
Operational Supply Voltage
Full Specification
Extend Limit
Operational Supply Voltage (Full Specification)
Supply Current Standby Mode
(5)
V
DD1
≤
14 V
V
CD1
= V
DD2
, V
CD2
= 0 V
Supply Current in Drivers on Configuration (Full Specification)
(5)
V
CD1
= 0 V
V
CD2
= V
DD2
OUTPUT DRIVERS CHARACTERISTICS (OUTD1 AND OUTD2 PINS)
Output Resistance (Full Specification and T
J
≤
130°C)
Output Resistance (Extent Limit and T
J
≤
130°C)
Leakage Current (Internal Current Source)
PROTECTION AND LEVEL DETECTION (OUTD1 AND OUTD2 PINS)
Positive Output Clamp
Output Current Limitation (130°C
≥
T
J
)
Output Fault Detector Level
Overtemperature Detection (at 25°C by Function Simulation)
INPUTS (CD1 AND CD2 PINS)
Input Voltage Low
Input Voltage High
Hysteresis
Input Current on Pin CD1 (Internal Pull-Up and CD1 Connected to Ground)
Leakage Current on Pin CD1 (Internal Pull-Up Connected to V
DD2
)
Input Current on Pin CD2 (Internal Pull Down CD2 Connected to V
DD2
)
Leakage Current on Pin CD2 (Internal Pull-Up CD1 Connected to Ground)
Notes
5
All INn and ADn inputs are connected to ground.
V
IL
V
IH
V
HST
I
CD1
I
LEAK
I
CD2
I
LEAK
—
8.0 x V
DD2
500
-100
-5.0
10
-5.0
—
—
800
-30
—
30
—
4.0 x V
DD2
—
—
-10
5.0
100
5.0
V
V
mV
µA
µA
µA
µA
V
CLAMP
I
LIM
V
FAULT
T
DETEC
40
300
2.0
145
50
535
2.75
160
60
750
3.5
175
V
mA
V
°C
R
DS(ON)
R
DS(ON)
I
LEAK
—
—
1.0
1.40
—
—
3.20
5.0
13
Ω
Ω
µs
IVDD1-1
IVDD1-0
VDD2
VDD1
Symbol
Min
Typ
Max
Unit
V
7.0
5.0
4.75
12
—
—
18
7.0
—
V
µA
—
—
55
—
110
10
µA
—
—
250
650
1500
1500
I
VDD2-0
I
VDD2-1
33287
Analog Integrated Circuit Device Data
Freescale Semiconductor
5
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