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Black USB header to dual DB9 serial adapter with 24 inch cable and low profile brackets

STARTECH

STARTECH ICUSB232INT2 2 Port USB to RS232 Adapter 24

SKU CH-8K10-7X60R MPN ICUSB232INT2

Adds two RS232 serial ports via an internal USB motherboard header, delivering up to 115200 bps with FTDI chipset and low-profile brackets included

  • Cable length24 in (61 cm)
  • Adapter typeUSB to DB9 (RS-232)
  • First connector1 - IDC (10 pin; Motherboard Header) Female
  • Second connector2 - DB-9 (9 pin; D-Sub) Male
  • Product colorBlack
  • DetailsConnector Types: 2 - DB-9 (9 pin; D-Sub) Male Interface: ser
  • Adds two serial ports via a single USB motherboard header
  • FTDI chipset supports 115200 bps for reliable data transfer
  • Bus-powered design removes the need for an external supply
  • Includes low-profile brackets for compact chassis installations
  • 24-inch cable length allows flexible internal routing

Two serial ports from a USB header

The ICUSB232INT2 adds two RS232 DB9 ports through a single 10-pin motherboard header. It draws power from the USB bus so no external supply is needed. The 24-inch cable reaches most internal routing paths. Legacy equipment and industrial gear connect directly without a separate expansion card.

Steady throughput with FIFO buffers

On-chip FIFO receive and transmit buffers smooth data flow during continuous transfers. COM-port retention keeps the same port assignments after reboots or driver reloads. The FTDI chipset sustains the rated 115200 bps without drop-outs. Bus power remains stable because the adapter draws only what the header provides.

Replaces add-in serial cards

This adapter removes the need for a PCI or PCIe serial card when a free USB header exists. The low-profile bracket fits slim chassis where full-height cards cannot. It is not suited for systems that lack an internal USB header or that require more than two serial ports.

How it compares

Measured against everything we stock in SATA, IDE & M.2 Drive Adapters, at today’s prices. Recalculated every night.

Price $51.99
Pricier than about 76% of the 1,721 comparable items (median $22.99).

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Specifications

Product
Brand nameStarTech.com
Model nameICUSB232INT2
Product colorBlack
Adapter typeUSB to DB9 (RS-232)
Ports & slots
First connector1 - IDC (10 pin; Motherboard Header) Female
Second connector2 - DB-9 (9 pin; D-Sub) Male
Size & build
Cable length24 in (61 cm)
Product dimensions0.7 in × 4.7 in × 2.7 in
Product weight0.14 lb (0.06 kg)
Shipping weight0.16 kg
Package size168 × 142 × 33 mm
In the box
In the box1 - USB Header to Serial Adapter
2 - Low profile bracket
1 - Driver CD
1 - Instruction Manual

Questions about this item

How much power does the ICUSB232INT2 draw when both serial ports are active all day?

The adapter is bus powered from the USB motherboard header, so it needs no separate supply and adds only a small load to the 5 V rail.

What motherboard header must be free to install this adapter?

A single 10-pin IDC USB header is required; the package includes a 24" cable and both low-profile and standard brackets for the two DB-9 ports.

Will the ICUSB232INT2 work with legacy equipment that expects 7 data bits and even parity at 115200 bps?

Yes — the FTDI chip supports 7 or 8 data bits, 1 or 2 stop bits, and none, odd, even, space or mark parity up to the full 115200 bps rate.

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