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STMPE321 Datasheet(PDF) 1 Page - STMicroelectronics |
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STMPE321 Datasheet(HTML) 1 Page - STMicroelectronics |
1 / 40 page August 2009 Doc ID 15791 Rev 3 1/40 40 STMPE321 3-channel capacitive touchkey controller Features ■ Up to 3 GPIOs ■ Up to 3 capacitive touchkey inputs ■ Operating voltage 1.65 - 1.95 V ■ Interrupt output pin ■ I2C interface (1.8 V operation, 3.3 V tolerant) ■ 8 kV HBM ESD protection ■ 40 fF resolution, 128-step capacitance measurement ■ Advanced data filtering (AFS) ■ Environment tracking calibration (ETC) ■ Individually adjustable touch variance (TVR) settings for all channels ■ Adjustable environmental variance (EVR) for optimal calibration ■ Capacitive key sensing capability in 27 µA sleep mode Applications ■ Mobile phones and smartphones ■ Portable media players ■ Game consoles Description The STMPE321 is a 3-channel capacitive touchkey controller. Capacitance measurement is implemented in fully optimized hardware. All 3 I/Os can be configured via an I2C bus to function as either capacitive touchkey, or as GPIOs (general purpose I/O). QFN12 (2.2 x 1.5 mm) Table 1. Device summary Order code Package Packing STMPE321QTR QFN12 (2.2 x 1.5 mm) Tape and reel www.st.com |
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