Supply chain issues

A project log for Isolated TTL USB UART

A USB to serial converter board, where the host is galvanically isolated from the target

nick-sayerNick Sayer 12/20/2021 at 02:390 Comments


I have some SI8035s left over from my development of the USB Isolated null modem.

But I don't have any SI8055s on hand... and now they're backordered until August. None of the SI80xx line are on hand anywhere. We can't have nice things.

For prototyping purposes, I can use a 35 to replace the 55. Doing so means that DCD and RI will fail to work, but it's a start.

EDIT: I found a few of these on AliExpress and have enough on hand for now.