Datasheet > ELM401P

ELM401P

更新时间： 2024-11-23 11:46:03

品牌	Logo	应用领域
ELM		编码器
页数	文件大小	规格书
8页	46K
描述
Rotary Encoder Debounce Circuit

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ELM401P 数据手册

ELM401

Rotary Encoder Debounce Circuit

Description

Features

The ELM401 is an 8 pin integrated circuit that is

• Low power CMOS design

used to ‘debounce’ the signals from a mechanical

rotary (quadrature) encoder. The low power CMOS

technology used ensures that only a very small

current is required over the entire 2.0 to 5.5 volt

operating range.

• Wide supply range – 2.0 to 5.5 volts

• Complete debouncing of the encoder signals

• No external filtering needed

• Includes switch debouncing circuit

• Startup delay timer

There is no need for external filtering or

debounce circuits with the ELM401, as this is all

performed within the integrated circuit. The ‘A’ and

‘B’ motion sensing encoder signals are both passed

through a filter then a comparator circuit, and finally

a timer circuit to remove noise and contact bounce,

while the switch input receives standard debounce

processing. The result are three virtually noise-free

signals that are suitable for direct use by an

electronic circuit.

• High current drive outputs

Connection Diagram

PDIP and SOIC

(top view)

Note that no inversion or manipulation of any

kind is performed on the input signals, other than the

debouncing. If your applications requires decoding of

the signals, you may wish to look at our ELM402 to

ELM408 family of products.

VDD

VSS

A out

B out

Sw out

Applications

• Microcontroller Interfaces

• Monitoring of Encoder Signals

• General Switch Debouncing

Block Diagram

VDD

Debounce

A out

Circuit

VDD

Debounce

Circuit

B out

Debounce

Circuit

Sw out

Rotary

Encoder

ELM401DSB

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