16C550 Single Serial Module BOM 1 RC2014 16C550 UART PCB 1 16C550 1 74HCT00 1 74HCT138 1 74HCT393 1 40 pin header 1 PLCC44 Socket 2 14 pin narrow DIL socket 1 16 pin narrow DIL socket 2 8 pin header 1 2 pin header 1 6 pin RA header 2 jumper 3 1k resistor 3 100nf