Pin Driver Strength

Figure 1. ATmega328PB: I/O Pin Output Voltage vs. Sink Current (V_CC = 3V)

Figure 2. ATmega328PB: I/O Pin Output Voltage vs. Sink Current (V_CC = 5V)

Figure 3. ATmega328PB: I/O Pin Output Voltage vs. Source Current (V_CC = 3V)

Figure 4. ATmega328PB I/O Pin Output Voltage vs. Source Current (V_CC = 5V)