RS 232 connector, RS 232 chips, RS232 converter, USB to RS 232 - tatanh1983/conchodom GitHub Wiki ICL3221 Series 250 kbps 15 kV RS232 5.5V Transmitter/Receiver - TSSOP-16 https://www.futureelectronics.com/p/semiconductors--signal-interface--rs-232/icl3221eivz-t-renesas-9034756