Driving Performance: The Updated LDC101 USB to CI-V Driver Guide

FTDI Chipsets: Many high-quality CI-V interfaces use FTDI chips. You can find the latest "VCP" (Virtual COM Port) drivers directly on the FTDI Chip official website.

However, as operating systems evolve (Windows 11 updates, macOS Ventura/Sonoma, and Linux kernel changes), the dreaded "driver not found" or "device malfunctioned" error appears. That brings us to today’s critical topic: The LDC101 USB to CIV driver has been updated.

The LDC101 USB to CI-V is an aftermarket interface cable used to connect Icom radios to a PC for "CAT" (Computer Aided Transceiver) control. While modern Icom rigs like the IC-7300 have built-in USB ports, this cable is essential for older models (e.g., IC-706, IC-718, IC-756) that only feature the CI-V remote jack. ⚙️ Key Technical Review Chipset Alert: Most "LDC101" or generic versions use Prolific PL2303 or Silicon Labs CP210x chips.

  1. Microsoft Driver Signing Changes (Windows 8, 10, 11): Microsoft began blocking older, unsigned, or counterfeit Prolific drivers. Many cheap LDC101 clones use fake PL2303 chips. The "updated" driver often refers to the Prolific v3.8.25.0 or later, which specifically blocks counterfeit chips.
  2. COM Port Disappearance: Without the correct updated driver, Windows will show Error 10 (Device cannot start) or Error 31 (Driver corrupted).
  3. MacOS Compatibility: Older drivers broke on macOS Catalina (10.15) and newer due to the deprecation of 32-bit kernel extensions.

Alternatives with better driver support:

  • The updated LDC101 USB-to-CAN driver reliably provides a simple bridge between USB and CAN networks for basic development and diagnostics.
  • Good for hobbyists and small labs; not ideal for high-reliability production CAN gateways.