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Black USB-A to DB9 serial adapter cable with moulded connectors

STARTECH

STARTECH ICUSB2321X USB to RS232 Serial Cable

SKU CH-5EEE-1T3D9 MPN ICUSB2321X

Adds a serial RS-232 port with COM retention via USB, using a Texas Instruments chipset for up to 230 Kbps

  • Connector count2
  • Connector detailsConnector Types 1 - USB A Female Connector Types 1 - DB9 Mal
  • Product typeCable Connectors
  • Product colorBlack
  • DetailsOS Support : 32-bit Windows Vista, XP, 2000, Server 2000 and
  • Key featuresBaud Rate up to 230 kbit/s Being able to rename devices no m
  • Adds an RS-232 port via USB with COM port retention
  • Up to 230 Kbps baud rate for legacy device connectivity
  • Texas Instruments TIUSB3410 chipset ensures reliable serial communication
  • Built-in loopback testing simplifies troubleshooting serial connections
  • Supports 32-bit and 64-bit Windows including Vista, XP, 2000, 2003

USB to RS232 serial adapter for legacy devices

This professional-grade cable converts a USB port into an RS232 serial connection using the Texas Instruments TIUSB3410 chipset. It adds a single DB9 male port to laptops or computers lacking native serial interfaces. The adapter is designed for technicians and engineers who maintain industrial equipment, networking hardware or point-of-sale systems requiring direct serial communication.

Data rate capped at 230 Kbps with OS constraints

Maximum throughput reaches 230 Kbps, which suits legacy console management and modem links but rules out high-speed serial applications. Full 32-bit driver support covers Windows Vista, XP, 2000, Server 2000 and 2003; 64-bit systems receive limited functionality with a separate driver download. Buyers needing guaranteed operation on modern 64-bit Windows releases or on non-Windows platforms should verify compatibility before purchase.

Black cable with USB-A female and DB9 male ends

The two-connector assembly uses a USB-A female receptacle for the host link and a standard DB9 male plug for the serial device, both finished in black. COM port retention preserves port assignments across reboots and disconnections, while loopback testing aids rapid troubleshooting. Users who require ruggedised locking connectors, galvanic isolation or cables longer than the supplied length will need a different solution.

How it compares

Measured against everything we stock in RS-232 Serial Cables, at today’s prices. Recalculated every night.

Price $34.99
Pricier than about 70% of the 93 comparable items (median $21.99).

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Specifications

Product
Brand nameStarTech.com
Model nameICUSB2321X
Product typeCable Connectors
Product colorBlack
Ports & slots
Connector count2
Connector detailsConnector Types 1 - USB A Female
Connector Types 1 - DB9 Male
Size & build
Shipping weight0.10 kg
Package size173 × 140 × 33 mm

Questions about this item

What does the 230 Kbps maximum data transfer rate mean when the adapter is connected?

The adapter supports baud rates up to 230 Kbps, so legacy serial devices can communicate at their full rated speed without bottlenecking the USB link.

Which USB and serial interfaces does this cable use?

It connects a USB-A female port to a DB9 male RS-232 connector, providing one serial port over a standard USB interface.

How does COM port retention work on this adapter?

Assigned COM port numbers are stored in the adapter so they are automatically restored after a reboot or when the cable is unplugged and reconnected.

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