RS 232 converter, USB to rs232 converter, RS 232 to USB, RS 232 to 485 converter - 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-485-422/isl3172eibz-t-renesas-4027816