SX8663 datasheet(2/64 Pages) SEMTECH

Part #	SX8663

Description	Capacitive Button Matrix (up to 36) and Proximity Controller with Individual LED Drivers and Buzzer Output

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Manufacturer	SEMTECH [Semtech Corporation]

Direct Link	http://www.semtech.com

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ADVANCED COMMUNICATIONS & SENSING

Rev5 4

th August 2011

www.semtech.com

2

SX8663

Capacitive Button Matrix (up to 36) and Proximity Controller

with Individual LED Drivers and Buzzer Output

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

Introduction

10

3.1.1

General

10

3.1.2

Parameters

10

3.1.3

Configuration

10

3.2

Scan Period

10

3.3

Operation modes

11

3.4

Sensors on the PCB

12

3.4.1

Matrix Keys/Buttons (MK)

12

3.4.2

Priority Key/Button (PK)

12

3.4.3

Proximity Sensor (PS)

13

3.4.4

Schematics Requirements

13

3.5

Button Information (MK and PK)

15

3.6

Analog Sensing Interface

15

3.7

Offset Compensation

17

3.8

Processing

18

3.9

Configuration

18

3.10

Power Management

20

3.11

Clock Circuitry

20

3.12

I2C interface

20

3.13

Interrupt

21

3.13.1

Power up

21

3.13.2

Assertion

21

3.13.3

Clearing

21

3.13.4

Example

22

3.14

Reset

22

3.14.1

Power up

22

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