BS801C/02C/04C/06C/08C - Touch Key 

 General Description 

 BS801C/2C/4C/6C/8C 1-8 touch buttons can be used to detect the touch action of the external touch keys on the manpower. The chip has a high level of integration, and use fewer external components can be achieved the application of the touch keys. 
 The BS804C, and BS808C also provides a single-wire serial interface, easy communication between the external MCU, the realization of the chip set and touch the pin button detection purposes. 
 Inside the chip integrated circuits with high power supply rejection ratio, can reduce the occurrence of key detection error, this feature ensures the chip still has high reliability in the application of adverse environmental conditions. This series of touch-chip automatic calibration, and low operating current and low-power one-touch state properties, the application of a variety of touch keys provide a simple and effective method. 

 Feature 

 Operating voltage: 2.2V ~ 5.5V 

 Low operating current: 3.0μA (VDD = 3V) 
 Automatic calibration function 
 Reliable key detection 
 High power supply rejection ratio 
 Level-Hold or Toggle Output 
 One-Key or Any-Key Status 
 Pin or serial commands to set the button state 
 Open-drain NMOS output 
 Pin or serial testing key state