4-Key Touch Detection IC - Capacitive Touch Chip CT8224C

I. Capacitive Touch Chip -Features of CT8224C:

Operating voltage 2.4V~5.5V
The internal voltage regulator circuit can be enabled or disabled via external option, selected through the REGEN pin
The internal low-voltage reset circuit can be enabled or disabled via external option, selected through the LVREN pin. The 8224C has LVR disabled by defaultOperating current
-@VDD=3V no load: typical 4.5uA in low-power mode, typical 22uA in fast mode
-@VDD=3V operating voltage: in fast mode, the fastest response time for KEY is 60ms; in low-power mode, it is 160ms
The sensitivity of each KEY can be adjusted by external capacitors (1~50pF)
Provides LPMB pin to select fast mode or low-power mode
Provides direct output mode, toggle mode, open-drain output, CMOS high-level active or low-level active output, selected via TOG/OD/AHLB pins
Provides SM pin to select multi-key or single-key output mode
Provides MOT1, MOT0 pins to select the maximum output time for active keys: 120 seconds/64 seconds/16 seconds
After power-on, there is a system stabilization time of about 0.5 seconds. During this period, do not touch the Touch PAD, and the touch function is disabled
Has auto-calibration function. Within 8 seconds after power-on, the system recalibration period is about 1 second. If a key is touched within 8 seconds or no key is touched for more than 8 seconds, the system recalibration period switches from 1 second to 4 seconds

II. Capacitive Touch Chip -Applications of CT8224C:

TWS Bluetooth earphones

Smart speakers

AI smart devices

Educational toys

Smart home