SMSC CAP1105 / CAP1106 Revision 1.32 (01-05-12)
PRODUCT PREVIEW
Data Brief
PRODUCT FEATURES
CAP1105 / CAP1106
5 and 6 Channel Capacitive Touch
Sensor
General Description
The CAP1106 and CAP1105, which incorporate SMSC’s
RightTouch® 1 technology, are multiple channel Capacitive
Touch sensors. The CAP1106 contains six (6) individual
capacitive touch sensor inputs while the CAP1105 contains
five (5) sensor inputs. Both devices offer programmable
sensitivity for use in touch sensor applications. Each sensor
input automatically recalibrates to compensate for gradual
environmental changes.
The CAP1105 / CAP1106 includes Multiple Pattern Touch
recognition that allows the user to select a specific set of
buttons to be touched simultaneously. If this pattern is
detected, then a status bit is set and an interrupt generated.
Additionally, the CAP1105 / CAP1106 includes circuitry and
support for enhanced sensor proximity detection.
The CAP1105 / CAP1106 offers multiple power states
operating at low quiescent currents. In the Standby state of
operation, one or more capacitive touch sensor inputs are
active.
Deep Sleep is the lowest power state available, drawing
5uA (typical) of current. In this state, no sensor inputs are
active. Communications will wake the device.
Applications
Desktop and Notebook PCs
LCD Monitors
Consumer Electronics
Appliances
Features
Six (6) Capacitive Touch Sensor Inputs - CAP1106
Five (5) Capacitive Touch Sensor Inputs - CAP1105
— Programmable sensitivity
— Automatic recalibration
— Individual thresholds for each button
Proximity Detection
Multiple Button Pattern Detection
Calibrates for Parasitic Capacitance
Analog Filtering for System Noise Sources
Press and Hold feature for Volume-like Applications
Multiple Communication Interfaces
—SMBus / I
2C compliant interface (CAP1106-1 only)
— SMSC BC-Link interface (CAP1106-2 only)
— SPI communications (CAP1105 only)
Low Power Operation
— 5uA quiescent current in Deep Sleep
— 50uA quiescent current in Standby (1 sensor input
monitored)
— Samples one or more channels in Standby
Available in 10-pin 3mm x 3mm RoHS compliant DFN
package
1. SMSC, the SMSC logo and RightTouch are registered trademarks
and the RightTouch logo is a trademark of Standard Microsystems
Corporation ("SMSC").
CAP1106 BLOCK DIAGRAM CAP1105 BLOCK DIAGRAM
SMBus /
BC-Link
Protocol
VDD GND
Capacitive Touch Sensing Algorithm
CS1 CS2 CS3 CS4 CS5
SMCLK1 / BC_CLK2
SMDATA1 / BC_DATA2
ALERT#1 / BC_IRQ#2
1 = CAP1106-1
2 = CAP1106-2
CS6
SPI Protocol
SPI_CLK
SPI_MOSI
SPI_MISO
Capacitive Touch Sensing
Algorithm
CS1 CS2 CS3 CS4 CS5
SPI_CS#
VDD GND
Order Number(s):
REEL SIZE IS 4,000 PIECES
This product meets the halogen maximum concentration values per IEC61249-2-21
For RoHS compliance and environmental information, please visit www.smsc.com/rohs
ORDERING NUMBER PACKAGE FEATURES
CAP1106-1-AIA-TR 10-pin DFN 3mm x 3mm
(Lead-free RoHS compliant)
Six capacitive touch sensor inputs,
SMBus interface
CAP1106-2-AIA-TR 10-pin DFN 3mm x 3mm
(Lead-free RoHS compliant)
Six capacitive touch sensor inputs, BC-
Link interface
CAP1105-1-AIA-TR 10-pin DFN 3mm x 3mm
(Lead-free RoHS compliant)
Five capacitive touch sensor inputs, Full
Duplex SPI interface
5 and 6 Channel Capacitive Touch Sensor
Revision 1.32 (01-05-12) 2 SMSC CAP1105 / CAP1106
PRODUCT PREVIEW
Copyright © 2012 SMSC or its subsidiaries. All rights reserved.
Circuit diagrams and other information relating to SMSC products are included as a means of illustrating typical applications. Consequently, complete information sufficient for
construction purposes is not necessarily given. Although the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC
reserves the right to make changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications
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5 and 6 Channel Capacitive Touch Sensor
SMSC CAP1105 / CAP1106 3 Revision 1.32 (01-05-12)
PRODUCT PREVIEW
Package Information
Figure 1 10-Pin DFN 3mm x 3mm Package Drawings
5 and 6 Channel Capacitive Touch Sensor
Revision 1.32 (01-05-12) 4 SMSC CAP1105 / CAP1106
PRODUCT PREVIEW
Figure 2 10-Pin DFN 3mm x 3mm Package Dimensions
Figure 3 10-Pin DFN 3mm x 3mm PCB Footprint
