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STMPE821 Datasheet(PDF) 10 Page - STMicroelectronics

Part # STMPE821
Description  8-bit Xpander Logic??with touchkey controller
PDF  55 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STMPE821 Datasheet(HTML) 10 Page - STMicroelectronics

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Power schemes
STMPE821
10/55
3
Power schemes
The STMPE821 can be powered by a 1.8 V supply directly, or 3.0 - 3.6 V supply through the
internal voltage regulator. VIO powers all the GPIOs directly, if LED driving is required on the
GPIO, VIO should be at least 3.3 V.
Figure 6.
Power using the internal regulator
Figure 7.
Power bypassing the internal regulator
STMPE821
VIO
VCC
GND
3 - 5.5 V
CS00048
STMPE821
VIO
VCC
GND
CS00051
1.65 - 1.95 V
1.65 - 5.5 V



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