3 Channel Capacitive Touch Sensor with 3 LED Drivers
Datasheet
Chapter 1 Pin Description
CAP1133
3mm x 3mm DFN
ALERT#
SMDATA
SMCLK
VDD
LED1
1
2
3
4
5
10
9
8
7
6
CS1
CS2
CS3
LED3
LED2
GND
Figure 1.1 CAP1133 Pin Diagram (10-Pin DFN)
Table 1.1 Pin Description for CAP1133
PIN
NUMBER
UNUSED
CONNECTION
Connect to
Ground
leave open
PIN NAME
PIN FUNCTION
Active low alert / interrupt output usable for SMBus alert
PIN TYPE
OD (5V)
DO
DIOD (5V)
1
ALERT#
Active high alert / interrupt output usable for SMBus
alert
2
3
4
SMDATA
SMCLK
VDD
Bi-directional, open-drain SMBus data - requires pull-up
SMBus clock input - requires pull-up resistor
Positive Power supply
Open drain LED 1 driver (default)
n/a
DI (5V)
Power
OD (5V)
n/a
Connect to
Ground
leave open or
connect to
Ground
Connect to
Ground
leave open or
connect to
Ground
SMSC CAP1133
5
LED1
Push-pull LED 1 driver
DO
Open drain LED 2 driver (default)
6
LED2
Push-pull LED 2 driver
OD (5V)
DO
Revision 1.32 (01-05-12)
8
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