Icom Ci V Usb Interface Schematic Top ❲SIMPLE × Blueprint❳

This is the most popular method today because these chips output the exact TTL voltage (approx 5V or 3.3V) that the Icom radio expects. You do need a MAX232 chip here.

CI-V requires an open-collector driver.

A standard 3.5mm mono jack . The tip carries the DATA signal, and the sleeve is GND. The "Top" Schematic: USB-to-TTL Method icom ci v usb interface schematic top