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STMicroelectronics Capacitive Touch Key Controller: STMPE321 / STMPE821

The STMicroelectronics STMPE321 3-channel capacitive touch key controller and STMPE821 8-channel capacitive touch key controller implement capacitance measurement fully in optimized hardware. The 8 I/Os in the STMPE821 and the 3 I/Os in the STMPE321 can be configured via an I²C bus to function as either capacitive touch key or GPIO. These STMicroelectronics capacitive touch key controllers are ideal for mobile phones and smart phones, portable media players, and game consoles.

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