Datasheet > ELM409P

ELM409P

更新时间： 2024-11-05 11:46:03

品牌	Logo	应用领域
ELM		/
页数	文件大小	规格书
8页	51K
描述
Versatile Debounce Circuit

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ELM409P 数据手册

ELM409

Versatile Debounce Circuit

Description

Features

The ELM409 is digital filter circuit that is used to

interface mechanical contacts to electronic circuits.

• Standard and extra long debounce times

• Schmitt input provides hysteresis

All mechanical contacts, whether from switches,

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

make or break a connection. When that contact is

used for the electrical input to a digital circuit, the

bounces can easily be incorrectly interpreted as

multiple inputs. The ELM409 contains all of the logic

that is typically required to remove the bounce from

such signals, and provide a signal that has only one

transition.

• Complementary circuit outputs

• Needs no external timing components

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

• Wide supply range - 3.0 to 5.5 volt operation

• High current drive outputs

In addition to providing the standard debounce

function, the ELM409 may also be configured for

other useful functions such as generating pulses or

alternating output levels on signal transitions.

Connection Diagram

PDIP and SOIC

(top view)

No external components are needed for the

operation of the ELM409, as all timing and logic

functions are performed internally.

VDD

VSS

Out

Applications

• Pushbutton interface for logic circuits

• Limit switch monitoring

• Time delay generation

• Power on sequencing

Block Diagram

Control Logic

pulse

edge

generator

detectors

500 msec

debounce

Out

25 msec

debounce

edge

detectors

toggle

circuit

ELM409DSA

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