CST223A Overview:
CST223A is a single button touch detection chip, which is equipped with a built-in voltage stabilizing circuit to provide stable voltage for touch sensing circuits. The stable touch detection effect can widely meet the needs of different applications. This touch detection chip is specifically designed to replace traditional buttons, and the size of the touch detection PAD can be designed within a reasonable range according to different sensitivities, with low power consumption and wide working voltage, This is the characteristic of this touch chip in DC or AC applications.
CST223A Features:
Working voltage 2.3V~5.5V
The built-in voltage regulator circuit provides stable voltage for the detection circuit to use
Built in Low Voltage Reset (LVR) function
Working current 6ua@vdd =3V, no load
Low power standby current 2ua@vdd =3V, no load
Flexibly adjustable sensitivity, no external capacitance required, maximum parasitic capacitance value of 30pF
Touch detection input pins connected in series with a 0-100K resistor can adjust sensitivity
The output mode has been configured, eliminating the need for external selection resistors
Optional CMOS output/open drain output, effective for high/low levels
The touch output pin provides a maximum output time of 16 seconds
After power on, there is a stable time of about 0.5 seconds
Automatic calibration function, environmental adaptive calibration function
DFN-6L, SOT23-6L packaging
CST223A Application:
Various consumer products
Replace button buttons
CST223ASelection table/ordering information:
Selection List
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CST223A-KGSAx
CST223A-KGHAx
CST223A-CGSBx CST223A-CGHBx CST223A-KDSAx CST223A-KDHA CST223A-CDSAx CST223A-CDHAx CST223A-CDSBx CST223A-CDHBx |
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Ordering Information List
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CST223A-KGSAx
CST223A-KGHAx
CST223A-CGSBx
CST223A-CGHBx
CST223A-KDSAx
CST223A-KDHA
CST223A-CDSAx
CST223A-CDHAx
CST223A-CDSBx
CST223A-CDHBx
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CST223AChip Block Diagram:
CST223APin configuration:
CST223A Application Circuit:
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