Arduino Mega replacement based on Microchip SAMC21

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Main components

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Part NumberDescription
ATSAMC21N
LMV358Dual Low-Voltage Rail-to-Rail Output Operational Amplifiers, SOIC-8/SSOP-8
USBLC6-2SC6Very low capacitance ESD protection diode, 2 data-line, SOT-23-6
FT231XQFull Speed USB to Full Handshake UART, QFN-20
NCP1117-5.0
LP2985-3.3150mA 16V Low-noise Low-dropout Regulator With Shutdown, 3.3V output voltage, SOT-23-5

Mega schematic

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Mega board layout