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Black USB-C to DB9 serial adapter cable 15.70 inches long

STARTECH

STARTECH ICUSB232PROC USB C to Serial Converter 921.6 Kbps

SKU CH-186E-RGTWC MPN ICUSB232PROC

Adds a serial port via USB-C with COM port retention and 921.6 Kbps speed

  • Adapter typeUSB to DB9 (RS-232)
  • First connector1x USB Type-C male
  • Second connector1x DB-9 male
  • Product colorBlack
  • DetailsHumidity: 5 to 85% RH Operating Temperature: -10 to 80 degre
  • Product dimensions15.7 in × 1.4 in × 0.8 in (L × W × H)
  • Add a serial port to USB-C devices with COM port retention
  • High-speed 921.6 Kbps baud rate for fast data transfer
  • Works with Windows, macOS and Linux operating systems
  • Supports remote wake-up and power management control
  • Durable design rated for 30000 hours MTBF

USB-C to DB9 serial adapter

This USB-C to DB9 serial adapter adds a standard RS-232 port to computers that lack one, reaching a maximum baud rate of 921.6 Kbps. It is intended for engineers, technicians and hobbyists who need to configure or monitor industrial equipment, networking gear or legacy peripherals through a modern USB-C connection.

Driver installation and COM retention

The adapter uses a standard USB CDC or vendor driver on Windows, macOS and Linux; installation is typically a single executable or kernel module load. COM port retention keeps the same port number after reboots or unplugging, preventing the common issue where software loses the assigned port and requires manual reassignment.

Verify host port and cable orientation

Confirm the host system provides a USB-C port capable of data transfer, not charging only, and that the operating system version is listed as supported. The DB9 male connector is wired straight-through, so a null-modem cable or gender changer may be required depending on the target device pinout.

How it compares

Measured against everything we stock in USB Adapter Cables & Dongles, at today’s prices. Recalculated every night.

Price $26.99
Pricier than about 83% of the 1,430 comparable items (median $14.99).

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Specifications

Product
Brand nameStarTech.com
Model nameICUSB232PROC
Product colorBlack
Adapter typeUSB to DB9 (RS-232)
Ports & slots
First connector1x USB Type-C male
Second connector1x DB-9 male
Size & build
Cable lengthNo
Product dimensions15.7 in × 1.4 in × 0.8 in (L × W × H)
Shipping weight0.01 kg
Package size220 × 200 × 25 mm
In the box
In the box1 x Serial Adapter Cable
1 x Quick-Start Guide

Questions about this item

How can I verify the ICUSB232PROC is communicating correctly after I plug it in?

Open Device Manager on Windows or run `ls /dev/ttyUSB*` on Linux; the adapter should appear as a new COM or ttyUSB port and the assigned number will persist after reboot thanks to COM port retention.

What ships with the ICUSB232PROC and what must I source separately?

The box contains the USB-C to DB9 serial adapter cable and a quick-start guide; no separate driver media is included because drivers are delivered through Windows Update, macOS built-in support, and the Linux kernel.

Which ICUSB232PROC variant should I choose for a device that needs 921.6 Kbps throughput?

This single model operates at up to 921.6 Kbps with 512-byte FIFO and supports None, Xon/Xoff, RTS/CTS and DTR/DSR flow control, so it covers the stated speed requirement without a higher-capacity option.

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