A3 S2A I/O Source pin 2A. Can be an input or output. B1 D1 I/O Drain pin 1. Can be an input or output. B2 GND GND Ground (0 V) reference B3 D2 I/O Drain pin 2. Can be an input or output. C1 S1B I/O Source pin 1B. Can be an input or output. C2 VDD P ...