ELM410
Pin Descriptions
VDD (pin 1)
CMOS, not schmitt trigger, so the use of external
delay capacitors, etc. is not recommended. An
internal pullup resistor is provided to allow direct
interface to mechanical contacts (refer to the
specs for further information).
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 not required. Refer to
the Electrical Characteristics section for further
information.
Out3 (pin 5)
This is the output pin for the third debounce
circuit. Refer to the description for pin 2.
Out1 (pin 2)
This is the output pin for the first debounce
circuit. A logic low applied to pin 7 will cause this
pin to go to a logic high level, once the input is
stable for the debounce period. Similarily, a logic
high (or open circuit) at pin 7 will result in this pin
being driven to a logic low level after the
debounce period.
In2 (pin 6)
This is the input pin for the second debounce
circuit. Refer to the description for pin 4.
In1 (pin 7)
This is the input pin for the first debounce circuit.
Refer to the description for pin 4.
Out2 (pin 3)
This is the output pin for the second debounce
circuit. Refer to the description for pin 2.
VSS (pin 8)
Circuit common is connected to this pin. This is
the most negative point in the circuit.
In3 (pin 4)
This is the input for circuit 3. Levels are standard
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............................... ELM410P
200 mil SOIC..................................... ELM410SM
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.
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ELM410DSB
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