Datasheet > ELM411P

ELM411P

更新时间： 2024-11-23 04:17:19

品牌	Logo	应用领域
ELM		锁存器
页数	文件大小	规格书
4页	28K
描述
Debounce Circuit with Latch

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ELM411P 数据手册

ELM411

Debounce Circuit with Latch

Description

Features

The ELM411 provides all of the necessary

circuitry to connect as many as three independent

mechanical contacts to an electronic circuit.

• Low power CMOS design - typically 1mA at 5V

• Wide supply range - 3.0 to 5.5 volt operation

• Simultaneous monitoring of three circuits

All mechanical contacts, whether from switches,

relays, etc. will have inherent ‘bounce’ when they

make or break a connection. Depending on the type

of switch, this fluctuation can be quite pronounced,

often being interpreted as multiple inputs by high

speed digital circuits.

• Full 25msec debounce period on contact closure

and opening, without external components

• Internal pullup resistors for contact monitoring

• High current drive outputs - up to 25 mA

• Can be cascaded to provide sequential outputs

All of the logic required to remove the bounce

from most mechanical sources is provided by this

circuit, without the use of additional components. As

well, internal pull-up resistors have been provided so

that the switch inputs can be directly connected to

the 8 pin package.

Connection Diagram

PDIP and SOIC

(top view)

The ELM411 is composed of two separate

inverters which follow the input directly, and one

latch circuit which toggles its state each time a

closed circuit is detected on the input.

VDD

Out1

Out2

In3

VSS

In1

In2

Applications

Out3

• Pushbutton interface for logic circuits

• Limit switch monitoring

• Time delay generation

Block Diagram

VDD

Debounce

Timers

Out1

In1

VDD

Debounce

Timers

Out2

In2

VDD

Debounce

Timers

Toggle

Flip-Flop

In3

Out3

ELM411DSB

Elm Electronics – Circuits for the Hobbyist

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