CST11281A Summary:
The CST11281A series chip has 1 to 4 touch button detection, which can be used to detect the touch actions of human hands on external touch buttons. The chips in this series have a high level of integration, requiring only a few external components to achieve touch button detection.
The CST11281A SOP8 package series chip has 3 touch buttons for parallel output or 4 touch buttons for serial output. The SOT23-6 packaging series chips have 1 to 2 touch buttons that directly output touch status. The chip has a high power supply voltage suppression ratio, which can reduce the occurrence of button detection errors. This feature ensures that the chip still has high reliability in applications under adverse environmental conditions.
The CST11281A series chips have a wide voltage operating range, low power consumption operating mode, industrial grade operating temperature range, automatic calibration function that adapts to the environment, and resistance to voltage fluctuations. They can provide a wide and simple range of touch button usage scenarios. Provides a simple and efficient implementation method for various touch button applications.
CST11281A Features:
* Working voltage: 2.2V~5.5V
* Low standby current
* Automatic calibration function
* Automatically switch standby/work mode
* Capable of withstanding voltage fluctuations
* Supports serial and parallel outputs
* Low voltage automatic reset function
* Energy saving sleep mode
* Industrial grade temperature range
* Output can be selected as high or low effectiveness
* Reliable touch button detection
* Sensitivity can be adjusted separately for each channel
* Sensitivity can be adjusted by external capacitance at the input end
* Maximum button output time detection
CST11281A Pin configuration：
CST11281A Application circuit:
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