sx8643 Semtech Corporation, sx8643 Datasheet - Page 2

• Manufacturer Part Number: sx8643
• Description: Ultra Low Power, Capacitive Button Touch Controller 12 Sensors With Enhanced Led Drivers
• Manufacturer: Semtech Corporation

ADVANCED COMMUNICATIONS & SENSING
G
T
K
A
O
1
2
3
Revision 7_5, February 10
YPICAL
EY
PPLICATIONS
ENERAL
RDERING
1.1
1.2
1.3
1.4
1.5
2.1
2.2
2.3
2.4
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
3.10
3.11
3.12
3.13
3.14
3.15
P
G
E
F
3.2.1
3.2.2
3.2.3
3.2.4
3.6.1
3.14.1
3.14.2
3.14.3
3.15.1
3.15.2
3.15.3
3.15.4
RODUCT
UNCTIONAL DESCRIPTION
LECTRICAL
ENERAL
A
Pin Diagram
Marking information
Pin Description
Simplified Block Diagram
Acronyms
Absolute Maximum Ratings
Recommended Operating Conditions
Thermal Characteristics
Electrical Specifications
Quickstart Application
Introduction
Scan Period
Operation modes
Sensors on the PCB
Button Information
Analog Sensing Interface
Offset Compensation
Processing
Configuration
Power Management
Clock Circuitry
I2C interface
Reset
Interrupt
D
PPLICATION CIRCUIT
I
ESCRIPTION
NFORMATION
General
GPIOs
Parameters
Configuration
Button Information
Power up
RESETB
Software Reset
Power up
Assertion
Clearing
Example
....................................................................................................................................... 1
F
D
EATURES
ESCRIPTION
C
HARACTERISTICS
........................................................................................................................ 1
...................................................................................................................... 1
..................................................................................................................... 1
............................................................................................................... 4
............................................................................................................ 1
........................................................................................................ 10
© 2010 Semtech Corp.
................................................................................................. 7
Table of Contents
Ultra Low Power, Capacitive Button Touch Controller
2
(12 sensors) with Enhanced LED Drivers
DATASHEET
www.semtech.com
SX8643
10
10
10
11
11
11
12
12
14
14
14
14
15
17
17
19
19
19
20
20
20
21
22
22
22
22
23
4
4
5
6
6
7
7
7
8