ELM410SM 데이터 시트보기 (PDF) - Elm Electronics

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ELM410SM

Triple Debounce Circuit

Elm Electronics 

ELM410

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 not required. Refer to

the Electrical Characteristics section for further

information.

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.

Out2 (pin 3)

This is the output pin for the second debounce

circuit. Refer to the description for pin 2.

In3 (pin 4)

This is the input for circuit 3. Levels are standard

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).

Out3 (pin 5)

This is the output pin for the third debounce

circuit. Refer to the description for pin 2.

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.

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............................... 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.

ELM410DSB

Elm Electronics – Circuits for the Hobbyist

< http://www.elmelectronics.com/ >

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