Multiple Channel Capacitive Touch Sensor and LED Driver
Datasheet
Table 2.2 Electrical Specifications (continued)
VDD = 3V to 3.6V, TA = 0°C to 100°C, all Typical values at TA = 27°C unless otherwise noted.
CHARACTERISTIC
SYMBOL
MIN
TYP
MAX
UNIT
CONDITIONS
Capacitive Touch Sensor
Base Capacitance
CBASE
5
15
50
2
pF
pF
Pad untouched
Pad touched
Detectable
Capacitive Shift
ΔCTOUCH
0.1
0.4
Sample Time
Update Time
tTOUCH
ΔtTOUCH
ΔtCAL
2.5
35
8
ms
ms
s
Recalibration Interval
Automatic Recalibration active,
no touch active, Default settings
LED / GPIO Drivers (LED / GPIO 1 - 8)
Duty Cycle
DUTYLED
ISINK
0
100
24
%
mA
mA
V
Programmable
VOL = 0.4
Sinking Current
Sourcing Current
Input High Voltage
Input Low Voltage
ISOURCE
VIH
24
VOH = VDD - 0.4
2.0
LED / GPIO configured as input
LED / GPIO configured as input
VIL
0.8
V
LED Drivers (LED 9 - LED 10)
Duty Cycle
Sinking Current
Output Low Voltage
DUTYLED
ISINK
0
100
24
%
mA
V
Programmable
ISINK = 24mA
Programmable
ISINK = 48mA
ISINK_IO = 8mA
VOL
0.4
LED11 Driver
Duty Cycle
Sinking Current
Output Low Voltage
DUTYLED
ISINK
0
100
48
%
mA
V
VOL
0.4
I/O Pins - SMDATA, SMCLK, and ALERT Pins
Output Low Voltage
Output High Voltage
VOL
VOH
0.4
V
V
VDD
0.4
-
ALERT pin active high and
asserted
ISOURCE_IO = 8mA
Input High Voltage
Input Low Voltage
Leakage Current
VIH
VIL
2.0
V
V
0.8
±5
ILEAK
uA
powered or unpowered
TA < 85°C
pull-up voltage < 3.6V
RESET Pin
Input High Voltage
SMSC CAP1014
VIH
2.0
V
Revision 1.65 (08-11-09)
DATA1S3HEET
SMSC [ SMSC CORPORATION ]
