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How much current can the I/ O pins handle?

April 26, 2017pins

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How much current can the I/ O pins handle?

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Each I/ O pin is capable of sourcing 20 mA and sinking 25 mA. The total across all I/ O pins should not exceed 40 mA source or 50 mA sink at any given time, however. One exception to this rule exists with the BS2-IC. If the BS2-IC is powered by an external 5-volt regulator capable of delivering at least 100 mA, the total across each group of 8 I/ O pins (0 -7 and 8 -15) can reach 40 mA source or 50 mA sink providing a total of 80 mA source or 100 mA sink overall.