LM9011
Electronic Ignition Interface
General Description
The LM9011 is an interface circuit which integrates the tim-
ing detection and logic control functions required for an
automotive electronic ignition system into one device.
A VRS interface is provided for crankshaft position informa-
tion via a toothed-wheel.
Four voltage comparators are provided for hardware diag-
nostics.
An electronic timing interface with output fault diagnostics is
provided to enable a micro-processor to drive an external
four channel ignition spark circuit.
The LM9011 is fully specified over the automotive tempera-
ture range of -40C to +125C, and is available in a 28 pin
Small Outline surface mount package.
Key Specifications
Features
n
Single 5V supply operation
n
VR Sensor Interface with dynamic hysteresis
n
Four Channel Electronic Timing spark driver with output
diagnostics
n
Electronic Timing Interface spark driver output voltage
from 5V to 16V
n
One Non-Inverting voltage comparator with hysteresis
n
Three Inverting voltage comparators with hysteresis
Connection Diagram
Top View
10126401
Ordering Information LM9011M
See NS Package M28B
March 2003
LM901
1
Electronic
Ignition
Interface
2003 National Semiconductor Corporation
DS101264
www.national.com
Absolute Maximum Ratings
(Note 1)
Voltage
-0.3V to +7.0V
S_HI Voltage
-0.3V to 26.5V
VR_HI and VR_LO Inputs
+/-3mA
Comparator Inputs
-0.3V to +7.0V
Timing Interface Inputs
-0.3V to +7.0V
ESD Susceptibility (Note 3)
+/-2000V
Maximum Junction Temperature
150C
Storage Temperature Range
-65C to +150C
Lead Soldering Information:
Vapor Phase (60 Seconds)
215C
Infrared (15 Seconds)
220C
Operating Ratings
(Note 3)
V
CC
Voltage
4.75V to 5.25V
S_HI Voltage
V
CC
to 26V
Sx Outputs
-0.3V to S_HI +0.3V
Comparator Inputs
VR_HI and VR_LO Inputs
-0.3V to V
CC
+0.3V
+/-2.75mA
Timing Interface Inputs
-0.3V to V
CC
+0.3V
Thermal Resistances (M28B):
Junction to Case (
J-C)
15C/W
Junction to Ambient (
J-C)
69C/W
DC Electrical Characteristics
The following specifications apply for V
CC
= 5V, V
RESET
= V
CC
, V
S_HI
=
V
CC
, -40C
T
A
+125C, Application Circuit Figure 16, unless otherwise specified.
Symbol
Parameter
Conditions
Minimum
Maximum
Units
I
CC
Supply Current
RESET, IN_4 = V
CC
25
mA
ENB, D0, D1, IN_1, IN_2, IN_3 =
0V
VR_HI = +12.5A
VR_LO = -12.5A
Comparators
V
TH
1
Input Threshold
V
IN
_1 Decreasing from V
CC
to 0V
until V
OUT
_1
>
V
CC
/2
V
CC
X 0.435
V
CC
X 0.485
V
V
TH
2
Input Threshold
V
IN
_2 Decreasing from V
CC
to 0V
until V
OUT
_2
>
V
CC
/2
V
CC
X 0.435
V
CC
X 0.485
V
V
TH
3
Input Threshold
V
IN
_3 Decreasing from V
CC
to 0V
until V
OUT
_3
>
V
CC
/2
V
CC
X 0.40
V
CC
X 0.45
V
V
TH
4
Input Threshold
V
IN
_4 Decreasing from V
CC
to 0V
until V
OUT
_4
<
V
CC
/2
V
CC
X 0.45
V
CC
X 0.50
V
V
HYST
Input Hysteresis
All Comparators
150
400
mV
I
BIAS
Input Bias Current
IN_1, IN_2, IN_3 = 0V
V
IN
V
CC
IN_4 = 0V
V
IN
_4
V
CC
-1V
750
A
V
OH
Output High Voltage
I
LOAD
= -100AV
V
CC
-1
V
V
OL
Output Low Voltage
I
LOAD
= +100AV
750
mV
VR Sensor Interface
V
OH
Output High Voltage
I
LOAD
= -15A
VR_HI= -1mA, VR_LO = +1mA
V
CC
-1
V
V
OL
Output Low Voltage
Load = +15A
VR_HI=+1mA, VR_LO = -1mA
750
mV
I
DIFF(MIN)
Minimum Detect Differential Input
Current (Note 4)
-40C
T
A
+25C
0.5
3.0
uA Pk-Pk
T
A
= +85C (Note 5)
0.6
3.5
uA Pk-Pk
T
A
= +125C
1.0
5.0
uA Pk-Pk
I
HYS
1
Input Hysteresis (Note 4)
I
DIFF
= 1mA pk-pk
75
250
uA Pk
I
HYS
2
Input Hysteresis (Note 4)
I
DIFF
= 2.5mA pk-pk
185
625
uA Pk
Electronic Timing Interface
V
IH
Input Logic 1 D0, D1, ENB, RESET
V
CC
X 0.7
V
V
IL
Input Logic 0 D0, D1, ENB, RESET
V
CC
X 0.3
V
I
IH
Input High Current Inputs D0, D1,
RESET
V
IN
= V
CC
10
A
I
IH
Input High Current Input ENB
V
IN
= V
CC
125
A
LM901
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2
DC Electrical Characteristics
The following specifications apply for V
CC
= 5V, V
RESET
= V
CC
, V
S_HI
= V
CC
,
-40C
T
A
+125C, Application Circuit Figure 16, unless otherwise specified. (Continued)
Symbol
Parameter
Conditions
Minimum
Maximum
Units
I
IL
Input Low Current Inputs D0, D1,
ENB
V
IN
= 0V
-10
A
I
IL
Input Low Current Input RESET
V
IN
= 0V
-125
A
V
OH
Output High Voltage Outputs S1,
S2, S3, S4
I
LOAD
= -10mA, V
S_HI
= 5V
3.75
V
V
OL
Output Low Voltage Outputs S1,
S2, S3, S4
I
LOAD
= 1mA, V
S_ HI
= 5V
300
mV
V
OH
Output High Voltage Outputs S1,
S2, S3, S4
I
LOAD
= -10mA, V
S_HI
= 16V
14
V
V
OL
Output Low Voltage Outputs S1,
S2, S3, S4
I
LOAD
= 1mA, V
S_HI
=16V
450
mV
V
OH
Output High Voltage Outputs S1,
S2, S3, S4
I
LOAD
= -10mA, V
S_HI
=26V
22
V
V
OL
Output Low Voltage Outputs S1,
S2, S3, S4
I
LOAD
= 1mA, V
S_HI
=26V
600
mV
V
OH
FAULT Pin Output High Voltage
I
FAULT
= -100A, no fault
V
CC
-1
V
V
OL
FAULT Pin Output Low Voltage
I
FAULT
= 100A, any fault
750
mV
V
FAULT
Fault Treshold Voltage Outputs S1,
S2, S3, S4
Sx Output Short Fault
V
CC
X 0.2
V
CC
X 0.5
V
I
FOL
TRI-STATE Output Current Outputs
S1, S2, S3, S4
V
RESET
= 0V, V
S _HI
= 5V
R
LOAD
= 10K
-12
-50
A
AC Electrical Characteristics
The following specifications apply for V
CC
= 5V, V
S_HI
= V
CC
, V
RESET
= V
CC
, -40C
T
A
+125C. The AC Timing Characteristics
are not production tested. Minimum and Maximum limits are guaranteed by device characterization.
Symbol
Parameter
Conditions
Minimum
Maximum
Units
Comparators
T
RISE
Output Rise Time
10% to 90%, C
LOAD
= 25pF
5
s
T
FALL
Output Fall Time
90% to10%, C
LOAD
= 25pF
5
s
VR Sensor Interface (Note 4)
T
RISE
Output Rise Time
10% to 90%, C
LOAD
= 100pF,
R
LOAD
= 100K
10
s
T
FALL
Output Fall Time
90% to10%, C
LOAD
= 100pF,
R
LOAD
= 100k
5
s
T
DELAY
Zero Crossing Delay Time (Note 6)
I
DIFF
= 5A pk-pk, F
VRS
= 200Hz
1
ms
I
DIFF
= 50A pk-pk, F
VRS
= 2.5KHz
10
s
F
MAX
Maximum VRS Frequency
C
LOAD
= 100pF, R
LOAD
= 100K
I
DIFF
= 5A pk-pk
50
KHz
Electronic Timing Interface
T
RISE
1
Sx Output Rise Time
Sx Rises10% to 90%
C
LOAD
= 6.8nF, R
LOAD
= 10K
5
s
C
LOAD
= 12.7nF, R
LOAD
= 10K
8
s
T
FALL
1
Sx Output Fall Time
Sx Falls 90% to 10%
C
LOAD
= 6.8nF, R
LOAD
= 10K
15
s
C
LOAD
= 12.7nF, R
LOAD
= 10K
25
s
T
SETUP
SetupTime (Notes 7, 8 and 9)
1
s
T
HOLD
Hold Time
0.5
s
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3
AC Electrical Characteristics
(Continued)
The following specifications apply for V
CC
= 5V, V
S_HI
= V
CC
, V
RESET
= V
CC
, -40C
T
A
+125C. The AC Timing Characteristics
are not production tested. Minimum and Maximum limits are guaranteed by device characterization.
Symbol
Parameter
Conditions
Minimum
Maximum
Units
T
DF
1
Fault Delay Time
Sx Output Short to Ground Fault
From ENB = 1 to FAULT
10%
C
FAULT
= 25pF
2
s
T
DF
2
Fault Delay Time
Sx Output Short to Battery Fault
From ENB = 0 to FAULT
10%
C
FAULT
= 25pF
2
s
T
TRI
TRI-STATE Delay Time
From RESET = 0 to All Sx Outputs
Off
2
s
T
RISE
2
Fault Pin Rise Time
10% to 90%, C
FAULT
= 25pF
5
s
T
FF(OFF)
False Fault Time
From ENB = 0 to FAULT
90%
C
FAULT
= 25pF
C
LOAD
= 6.8nF, R
LOAD
= 10K
25
s
C
LOAD
= 12.7nF, R
LOAD
= 10K
30
s
T
FF(ON)
False Fault Time
From ENB = 1 to FAULT
90%
C
FAULT
= 25pF
C
LOAD
= 6.8nF, R
LOAD
= 10K
8
s
C
LOAD
= 12.7nF, R
LOAD
= 10K
10
s
T
UDF
Undefined Fault Time
From ENB = 0 for 8uSec, to Valid
FAULT
C
LOAD
= 6.8nF, R
LOAD
= 10K
20
s
C
LOAD
= 12.7nF, R
LOAD
= 10K
25
s
Note 1: Absolute Maximum Ratings indicate the limits beyond which damage may occur.
Note 2: ESD Ratings is with Human Body Model: 100pF discharged through a 1500
resistor.
Note 3: Operating ratings indicate conditions for which the device is intended to be functional, but may not meet the guaranteed specific performance limits. For
guaranteed specifications and conditions, see the Electrical Characteristics.
Note 4: Tested per VR Sensor Interface test circuit. See Figure 8 and Figure 9.
Note 5: Minimum Detect Current is not production tested at +85C. Specifications is guaranteed through device characterization and Test Limits at 25C and 125C.
Note 6: VR Sensor Interface Tdelay, measured from VR input sine wave zero-crossing to VR_OUT going high. See Figure 9.
Note 7: Electronic Timing Interface Tsetup, minimum time between Vcc
>
4.75V and RESET = 1.
Note 8: Electronic Timing Interface Tsetup, minimum time between RESET = 1 and D0 = 1.
Note 9: Electronic Timing Interface Tsetup, minimum time between D0 / D1 = valid and ENB = 1.
LM901
1
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Typical Performance Characteristics
Supply Current vs Temperature
Ifol Source Current vs Temperature
10126403
10126404
VFault Threshold vs Temperature
Sx Source Current vs S_HI Voltage
10126405
10126406
Sx Sink Current vs S_HI Voltage
Sx Vol vs Sx Sink Current
10126407
10126408
LM901
1
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