BS804C key equivalent, (bs801c - bs808c) touch key.
* Operating voltage: 2.2V~5.5V
* Ultra low current: 3.0mA at 3V
* Auto-calibration
* High reliability touch detections
* High PSRR
* Output type: .
to be implemented with a minimum number of external components. The BS804C and BS808C are equipped with a One-line seria.
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