CAP1114
Multiple Channel Capacitive
Touch Sensor and LED Driver
Datasheet
PRODUCT FEATURES
General Description
Features
Fourteen (14) capacitive touch sensor inputs
The CAP1114, which incorporates SMSC’s
TM1
—
—
—
—
—
—
—
Compensates for variable sensor capacitance
RightTouch
technology, is a multiple channel
Programmable sensitivity
High SNR allows for easy tuning
Automatic recalibration
Slider acceleration detection
Slider positional detection
Proximity detection
Capacitive Touch sensor and LED Driver.
The CAP1114 contains up to fourteen (14) individual
Capacitive Touch sensor inputs with programmable
sensitivity for use in touch button and slider switch
applications. Each sensor also contains automatic
recalibration with programmable time delays.
Lid closure detection
Low power operation
The CAP1114 also includes internal circuitry to
compensate for design and parasitic variance in un-
touched capacitance on sensors.
—
—
4.5uA quiescent current in Deep Sleep
200uA quiescent current in Sleep while monitoring 1
button
Alert to signal touch to host processor
User controlled reset
Low external component count
SMBus 2.0 compliant interface to change operating
parameters to work in a wide variety of systems
—
The CAP1114 also contains eleven (11) low side LED
drivers that offer full-on / off, variable rate blinking,
dimness controls, and breathing. Capacitive buttons can
be linked to LED outputs.
Block Read and Write function for quick tasking
Applications
Eleven (11) LED driver outputs
Consumer Electronics
Desktop and Notebook PCs
LCD Monitors
—
—
—
Programmable blink, breathe, and dimness controls
8 configurable as GPIOs
Buttons can be linked to LED responses
Development boards and software available
Available in 32-pin 5mm x 5mm QFN Lead-free
RoHS Compliant package
1. SMSC and the SMSC logo are registered trademarks and SMSC
RightTouch and the RightTouch logo are trademarks of Standard
Microsystems Corporation (“SMSC”).
Block Diagram
LED2
LED4
LED6
LED8
LED10
LED9 LED11
GND
VDD
LED1
LED3
LED5
LED7
RESET
SMCLK
SMBus
Slave
Protocol
LED Blink, Breathe, and Dimness control
Capacitive Sensing Algorithm
SMDATA
ALERT
CS1
CS3
CS5
CS7
CS9
CS11
CS10
CS13
CS12 CS14
CS2
CS4
CS6
CS8
SMSC CAP1114
DATASHEET
Revision 1.1 (02-04-11)