EEWORLDEEWORLDEEWORLD

Part Number

Search

ELM405

Description
Rotary Decoder - 3 wire 4x Interface
File Size51KB,10 Pages
ManufacturerELM [ELM Electronics]
Download Datasheet Compare View All

ELM405 Overview

Rotary Decoder - 3 wire 4x Interface

ELM405
Rotary Decoder - 3 wire 4x Interface
Description
The ELM405 is an 8 pin integrated circuit that is
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.
There is no need for external filtering or
debounce circuits with the ELM405, as this is all
performed within the integrated circuit. After
debouncing the encoder signals, the ELM405
determines the direction of shaft rotation, and then
generates the appropriate outputs. The polarity of
the clock output can be changed at any time to
accommodate different needs.
The ELM405 provides 4x decoding of a rotary
encoder signal. If your application requires 2x
decoding, please see the ELM404 (it is identical to
the ELM405 in every respect, except that it provides
2x decoding).
Features
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
Startup delay timer
• High current drive outputs
Connection Diagram
PDIP and SOIC
(top view)
V
DD
A
1
2
3
4
8
7
6
5
V
SS
CS
Clk
U/D
Applications
Digital audio potentiometer controls
Variable voltage or temperature circuits
Positioning controls
Tuning circuits
B
Clk
Invert
Block Diagram
V
DD
A
2
Debounce
Circuit
Direction
Decoding
Debounce
Circuit
Output
Logic
7
CS
Clk
U/D
6
V
DD
B
3
5
Rotary
Encoder
Clk
Invert
4
ELM405DSA
Elm Electronics – Circuits for the Hobbyist
www.elmelectronics.com
1 of 10

ELM405 Related Products

ELM405 ELM405P ELM405SM
Description Rotary Decoder - 3 wire 4x Interface Rotary Decoder - 3 wire 4x Interface Rotary Decoder - 3 wire 4x Interface
Software cracking tips
Teach you how to crack software, learn it in one go...
luckyzhe MCU
This year
Suddenly I saw that today is the last day of November, and the three words "this year" suddenly appeared in my mind. It is almost December, and 11 years have passed. After a year, it feels like time h...
姚yolanda Talking
SPCE061A Materials
Very practical. Lingyang 16-bit MCU textbook...
wanghaixing Analog electronics
LM Flash Programmer Error when downloading program via serial port
I want to use LM Flash Programmer to download programs to LM3S1811 through the serial port, but now the following error keeps appearing. Is it because of my settings or other problems? Is there someth...
iceman5823 Microcontroller MCU
TI's new low-cost PCI Express x1 physical layer device XIO1100 enters volume production
Texas Instruments (TI) has announced that the new PCI Express x1 physical layer ( PHY ) device XIO1100 will be put into full production. XIO1100 can well meet the market demand for low-cost PCIe endpo...
amethyst Automotive Electronics
ADUCM360 ADUCM361 Minimum System Board Design Files
I recently drew a minimum system board for ADUCM36X, and I share the files here for those who need it. Schematic diagramPCB diagramSoldered physical diagramSchematic diagram of the connection through ...
littleshrimp ADI Reference Circuit

EEWorld
subscription
account

EEWorld
service
account

Automotive
development
circle

Robot
development
community

Index Files: 1816  2516  21  1141  1802  37  51  1  23  57 
Datasheet   0 1 2 3 4 5 6 7 8 9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Room 1530, 15th Floor, Building B, No. 18 Zhongguancun Street, Haidian District, Beijing Telephone: (010) 82350740 Postal Code: 100190
Copyright © 2005-2026 EEWORLD.com.cn, Inc. All rights reserved 京ICP证060456号 京ICP备10001474号-1 电信业务审批[2006]字第258号函 京公网安备 11010802033920号