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SX8644I05AWLTRT Datasheet(PDF) 2 Page - Semtech Corporation

Part # SX8644I05AWLTRT
Description  Ultra Low Power, Capacitive Button and Slider Touch Controller (12 sensors) with Enhanced LED Drivers
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Manufacturer  SEMTECH [Semtech Corporation]
Direct Link  http://www.semtech.com
Logo SEMTECH - Semtech Corporation

SX8644I05AWLTRT Datasheet(HTML) 2 Page - Semtech Corporation

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ADVANCED COMMUNICATIONS & SENSING
DATASHEET
Revision 7_3, January 10
© 2009 Semtech Corp.
www.semtech.com
2
SX8644
Ultra Low Power, Capacitive Button and Slider
Touch Controller (12 sensors) with Enhanced LED Drivers
Table of Contents
GENERAL DESCRIPTION........................................................................................................................ 1
TYPICAL APPLICATION CIRCUIT ............................................................................................................ 1
KEY PRODUCT FEATURES..................................................................................................................... 1
APPLICATIONS....................................................................................................................................... 1
ORDERING INFORMATION...................................................................................................................... 1
1
GENERAL DESCRIPTION............................................................................................................... 4
1.1
Pin Diagram
4
1.2
Marking information
4
1.3
Pin Description
5
1.4
Simplified Block Diagram
6
1.5
Acronyms
6
2
ELECTRICAL CHARACTERISTICS ................................................................................................. 7
2.1
Absolute Maximum Ratings
7
2.2
Recommended Operating Conditions
7
2.3
Thermal Characteristics
7
2.4
Electrical Specifications
8
3
FUNCTIONAL DESCRIPTION........................................................................................................ 10
3.1
Quickstart Application
10
3.2
Introduction
10
3.2.1
General
10
3.2.2
GPIOs
11
3.2.3
Parameters
11
3.2.4
Configuration
11
3.3
Scan Period
12
3.4
Operation modes
12
3.5
Sensors on the PCB
14
3.6
Button and Slider Information
15
3.6.1
Button Information
15
3.6.2
Slider Information
15
3.7
Analog Sensing Interface
17
3.8
Offset Compensation
18
3.9
Processing
19
3.10
Configuration
19
3.11
Power Management
21
3.12
Clock Circuitry
21
3.13
I2C interface
21
3.14
Reset
22
3.14.1
Power up
22
3.14.2
RESETB
22
3.14.3
Software Reset
23
3.15
Interrupt
24
3.15.1
Power up
24
3.15.2
Assertion
24
3.15.3
Clearing
24


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