產(chǎn)品詳情
16 KEYS OR 8 KEYS TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP229-BSF TonTouch
TM
IC is capacitive sensing design specifically for touch pad controls.
The device built in regulator for touch sensor. Stable sensing b can cover diversity conditions.
Human interfaces control panel bs through non-conductive dielectric material. The main application
is focused at replacing of the mechanical switch or button. The ASSP can independently handle the 8
touch pads or up to 16 touch pads.
FEATURES
? Operating voltage：2.4V~5.5V
? Built-in regulator
? Stand-by current
At 3V, and sleep mode slow sampling rate 8Hz：
=> Typical 2.5uA for 16 b keys
=> Typical 2.0uA for 8 b keys
? Provides to set 8 direct keys or 16 direct keys by option
? Provides to set 8 separate outputs only for 8 direct b keys mode
? Has a 2-wires serial output interface, both can use for 8 and 16 direct b keys mode
? 8 separate outputs can select output driving types by option
(CMOS/OD/OC with active high/low)
? 2-wires serial interface can select active high or low by option
? Offer multi-key or single-key feature by option
? Provides two kinds of sampling rate that slow sampling rate 8Hz
and fast sampling rate 64Hz at sleep mode
? Have the maximum key-on time about 80sec by pin option
? Sensitivity can adjust by the capacitance(1~50pF) outside
? After power-on have about 0.5sec stable-time,
During the time do not touch the key pad, and all functions are disabled
? Auto calibration for environment changing
And the re-calibration period is about 4.0sec, when all keys are not activated for fixed time
APPLICATION
? Wide consumer products
? Button key replacement
