Datasheet > ELM407SM

ELM407SM

更新时间： 2024-10-30 12:20:51

品牌	Logo	应用领域
ELM		解码器
页数	文件大小	规格书
10页	61K
描述
Rotary Decoder - 3 wire 4x Interface

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ELM407SM 数据手册

ELM407

Rotary Decoder - 3 wire 4x Interface

Description

Features

The ELM407 is an 8 pin integrated circuit that is

• Low power CMOS design

• Wide supply range – 2.0 to 5.5 volts

• Complete debouncing of the encoder inputs

• No external filtering needed

• 4x decoding

used to convert the output from a rotary encoder into

three signals (chip select, clock and up/down) that

can be used to control various devices. 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.

• Can generate a write sequence

• Startup delay timer

There is no need for external filtering or

debounce circuits with the ELM407, as this is all

performed within the integrated circuit. After

debouncing the encoder signals, the ELM407

determines the direction of shaft rotation, and then

generates the appropriate outputs. A write sequence

can also be generated if the Write Enable input is at

a high level when the outputs are generated.

• High current drive outputs

Connection Diagram

PDIP and SOIC

(top view)

The ELM407 provides 4x decoding of a rotary

encoder signal. If your application requires 2x

decoding, please see the ELM406 (it is identical to

the ELM407 in every respect, except that it provides

2x decoding).

VDD

VSS

Clk

U/D

Applications

Write

• Digital audio potentiometer controls

• Variable voltage or temperature circuits

• Positioning controls

Enable

• Tuning circuits

Block Diagram

VDD

Debounce

Circuit

Clk

U/D

Direction

Decoding

Output

Logic

VDD

Debounce

Circuit

Rotary

Encoder

Write

Enable

ELM407DSA

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