LM9011 Electronic Ignition Interface
February 2000
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 auto-
motive 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 -40藲C to +125藲C, 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
DS101264-1
Ordering Information LM9011M
See NS Package M28B
漏 2000 National Semiconductor Corporation
DS101264
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