SX8661 datasheet(2/88 Pages) SEMTECH

2 / 88 page

ADVANCED COMMUNICATIONS & SENSING

DATASHEET

Revision v3.2, January 2011

www.semtech.com

SX8661

Low Power, Capacitive Button Touch and Proximity Controller

(8 sensors) with LED Drivers and Analog Output

Table of Contents

GENERAL DESCRIPTION........................................................................................................................ 1

TYPICAL APPLICATION CIRCUIT ............................................................................................................ 1

KEY PRODUCT FEATURES..................................................................................................................... 1

APPLICATIONS....................................................................................................................................... 1

ORDERING INFORMATION...................................................................................................................... 1

GENERAL DESCRIPTION............................................................................................................... 5

1.1

Pin Diagram

1.2

Marking information

1.3

Pin Description

1.4

Simplified Block Diagram

1.5

Acronyms

ELECTRICAL CHARACTERISTICS ................................................................................................. 8

2.1

Absolute Maximum Ratings

2.2

Recommended Operating Conditions

2.3

Thermal Characteristics

2.4

Electrical Specifications

FUNCTIONAL DESCRIPTION........................................................................................................ 12

3.1

Quickstart Application

3.2

Introduction

3.2.1

General

3.2.2

GPIOs

3.2.3

Analog Output Interface A and B (SPO mode)

3.2.4

Buzzer (SPO mode)

3.2.5

Parameters

3.2.6

Configuration

3.3

Scan Period

3.4

Operation modes

3.5

Sensors on the PCB

3.6

Button Information

3.7

Buzzer

3.8

Analog Output Interface

3.9

Analog Sensing Interface

3.10

Offset Compensation

3.11

Processing

3.12

Configuration

3.13

Power Management

3.14

Clock Circuitry

3.15

I2C interface

3.16

Interrupt

3.16.1

Power up

3.16.2

Assertion

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