ELM413 Ver la hoja de datos (PDF) - Elm Electronics
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ELM413 Datasheet PDF : 4 Pages
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ELM413
Pin Descriptions
VDD (pin 1)
This pin is the positive supply pin, and should
always be the most positive point in the circuit.
Internal circuitry connected to this pin is used to
provide power on reset of the microprocessor, so
an external reset signal is normally not required.
Refer to the Electrical Characteristics section for
further information.
AuxOut (pin 2)
This is an output signal for gating auxiliary circuits
off and on. It is set to its active high level after the
trigger input has been at a high level for the time
determined by W1 and W0. It is forced low if the
trigger input drops below the lower threshold.
W1 (pin 3), and W0 (pin 4)
These are the two digital input pins that are used
to select the warmup period as shown in the chart
on page 1.
Trigger (pin 5)
This is a schmitt trigger input that is used to
initiate the circuit activity. A rising (low to high)
edge at this pin will cause the red LED to go off,
the green LED to become active, and the warmup
timer to begin timing. Once initiated, pin activity is
ignored until the warmup period is complete.
Green (pin 6)
This output pin signifies the power on (trigger
above the threshold) condition. It becomes
active once the threshold is exceeded, and
remains so until the trigger resets and the
warmup period is complete.
During the warmup period, this output will flash if
either the 1 second or the 5 second time is
selected. Flash rates are nominally 2 Hz and 1
Hz respectively. For the 0.1 and 0.5 second
periods, the pin remains at a constant high level.
Red (pin 7)
This is the red LED drive output. It will be at a
high level when the circuit is at idle and the
trigger input is a low level. At all other times, this
pin is at a low output level.
VSS (pin 8)
Circuit common is connected to this pin. This is
the most negative point in the circuit.
Ordering Information
These integrated circuits are available in either the 300 mil plastic DIP format, or in the 200 mil SOIC surface
mount type of package. To order, add the appropriate suffix to the part number:
300 mil Plastic DIP............................... ELM413P
200 mil SOIC..................................... ELM413SM
All rights reserved. Copyright ©1999 Elm Electronics.
Every effort is made to verify the accuracy of information provided in this document, but no representation or warranty can be
given and no liability assumed by Elm Electronics with respect to the accuracy and/or use of any products or information
described in this document. Elm Electronics will not be responsible for any patent infringements arising from the use of these
products or information, and does not authorize or warrant the use of any Elm Electronics product in life support devices and/or
systems. Elm Electronics reserves the right to make changes to the device(s) described in this document in order to improve
reliability, function, or design.
ELM413DSA
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