Preliminary
TTP229-BSF TonTouchTM
16 KEYS OR 8 KEYS TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP229-BSF TonTouch...
Preliminary
TTP229-BSF TonTouchTM
16 KEYS OR 8 KEYS TOUCH PAD DETECTOR IC
GENERAL DESCRIPTION
The TTP229-BSF TonTouchTM IC is capacitive sensing design specifically for touch pad controls. The device built in
regulator for touch sensor. Stable sensing method can cover diversity conditions. Human interfaces control panel links 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 input keys => Typical 2.0uA for 8 input keys Provides to set 8 direct keys or 16 direct keys by option Provides to set 8 separate outputs only for 8 direct input keys mode Has a 2-wires serial output interface, both can use for 8 and 16 direct input 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 di...