the-elm411-provides-all-of-the ELM Electronics, the-elm411-provides-all-of-the Datasheet - Page 2

• Manufacturer Part Number: the-elm411-provides-all-of-the
• Description: Debounce Circuit With Latch
• Manufacturer: ELM Electronics

ELM411DSB
Pin Descriptions
Ordering Information
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.
V
Out1 (pin 2)
Out2 (pin 3)
In3 (pin 4)
These integrated circuits are available in either the 300 mil plastic DIP format, or in the 200 mil SOIC surface
300 mil Plastic DIP............................... ELM411P
mount type of package. To order, add the appropriate suffix to the part number:
DD
This pin is the positive supply pin, and should
This is the output pin for the first debounce
This is the output pin for the second debounce
This is the input for circuit 3. Levels are standard
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.
circuit. A logic low applied to In1 (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.
circuit. Refer to the description for pin 2.
(pin 1)
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Out3 (pin 5)
In2 (pin 6)
In1 (pin 7)
V
200 mil SOIC..................................... ELM411SM
This is the output pin for the third debounce
This is the input pin for the second debounce
This is the input pin for the first debounce circuit.
SS
Circuit common is connected to this pin. This is
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).
circuit. At powerup, this pin is reset to a logic low
level. On each falling edge of In3 (pin 4), the
logic level at this pin will alternate between high
and low levels.
circuit. Refer to the description for pin 4.
Refer to the description for pin 4.
the most negative point in the circuit.
(pin 8)
ELM411
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