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Black USB-to-serial adapter cable with DB9 and DB25 male connectors, 3 ft long

STARTECH

STARTECH ICUSB232DB25 USB to Serial Cable 3 ft DB9 DB25 PL2303 250 Kbps

SKU CH-P3SA-2PX49 MPN ICUSB232DB25

Adds an RS-232 serial port via USB 2.0 with DB9 and DB25 connectors, 250 Kbps transfer rate, and a 512-byte FIFO buffer

  • TypeCable Connectors
  • ColorBlack
  • Length3 ft.
  • Connector Number2
  • Connector DetailExternal Ports: 1 - DB-25 (25 pin; D-Sub) Male External Port
  • Terminal GenderMale to Male

Style DB9 or DB25

Struck-through versions exist but are not stocked here.

  • Add an RS232 serial port via USB 2.0
  • Includes DB9 to DB25 adapter for 25-pin devices
  • Prolific PL-2303 chipset supports 250 Kbps transfer
  • USB powered with no external adapter required
  • 512-byte bi-directional FIFO buffer for reliable data

USB-to-RS232 adapter with DB9/DB25 support

This cable adds a single RS-232 serial port to a notebook or desktop through a USB 2.0 Type-A connection. It includes a DB9-to-DB25 pin adapter so the same lead can serve both 9-pin and 25-pin D-sub equipment. The link is USB-powered and requires no external supply. Plug-and-play operation suits field-service engineers and legacy-device integrators who need a quick serial port without opening the chassis.

Sustained throughput at 250 Kbps with 512-byte FIFO

The Prolific PL-2303 chipset maintains a maximum serial rate of 250 Kbps under continuous load rather than only in short bursts. A 512-byte bi-directional FIFO buffers data to reduce host interrupts during long transfers. Configurable data bits from four to eight, stop bits of one, one-and-a-half or two, and selectable parity let the link match legacy instrument settings without data loss over extended sessions.

Three-foot cable with male DB9.

The 3 ft lead terminates in a male DB-9 connector and a male USB 2.0 Type-A plug; the bundled adapter converts the DB-9 to a male DB-25 when 25-pin RS-232 is required. All connectors are moulded in black and the assembly weighs 2.47 oz. The short length keeps the setup tidy on a bench or in a rack but limits reach to nearby ports.

Highlights

  • Add an RS232 serial port via USB 2.0
  • Includes DB9 to DB25 adapter for 25-pin devices
  • Prolific PL-2303 chipset supports 250 Kbps transfer
  • USB powered with no external adapter required
  • 512-byte bi-directional FIFO buffer for reliable data

Specifications

BrandStarTech.com
ModelICUSB232DB25
TypeCable Connectors
ColorBlack
Length3 ft.
Connector Number2
Connector DetailExternal Ports: 1 - DB-25 (25 pin; D-Sub) Male
External Ports: 1 - DB-9 (9 pin; D-Sub) Male
Terminal GenderMale to Male
SpecificationsInterface: USB 2.0
Ports: 1
Product Weight: 2.47 oz [70 g]
Serial Protocol: RS-232
Maximum Data Transfer Rate: 250 Kbps
Data Bits: 4, 5, 6, 7, 8
Stop Bits: 1, 1.5, 2
FIFO: 512-byte bi-directional buffer
Parity: None, Even, Odd, Mark, Space
Flow Control: None, Xon/ Xoff, Hardware
Bus Type: USB 2.0
Connector Type(s): 1-USB A (4 pin) Male
Humidity: 0~90% RH
Operating Temperature: 0ºC to 60ºC (32ºF to 140ºF)
Storage Temperature: -20ºC to 80ºC (-4ºF to 176ºF)
Chipset ID: Prolific-PL2303HXD
Microsoft WHQL Certified: Yes
OS Compatibility:
Windows 2000/ XP(32/64bit)/ Server 2003(32/64bit)/ V
Sound QualityUSB powered,No external power adapters needed
Supports serial transfer speeds up to 250Kbps
Includes a DB9 to DB25 pin adapter for 25-pin RS232 serial communication
Supports USB transfer speeds up to 12Mbps
Plug-and-Play and Hot Swap Support
Windows certified (WHQL) drivers
Supports remote wake-up from Modem input signals and USB power management
Compliant with USB Rev. 2.0 Full-Speed specification
Electronics Industries Association (EIA) standard RS-232-C compliant
USB to Straight-Through RS232 Serial Adapter
Applications:
Ideal for connecting serial devices to laptops or tablet PCs
FeaturesCable Type: SerialCable Length: 3 ftConnector on First End: 1 x 9-pin DB-9 Male RS-232 SerialConnector on Second End: 1 x Type A Male USB 2.0 USBColor: GrayPackage Contents: USB to RS232 DB9/DB25 Serial Adapter Cable - M/MDB9 to DB25 pin AdapterGreen Compliant: YesGreen Compliance Certificate/Authority: RoHSLimited Warranty: 2 Year
Shipping weight0.15 kg
Package size170 × 145 × 32 mm

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Questions about this item

Does the ICUSB232DB25 cable draw enough USB power to run continuously without overheating?

The adapter is USB powered and needs no external supply; the PL2303 chip runs at up to 250 Kbps with a 512-byte FIFO, keeping power draw and heat low during all-day use.

What host connector must my computer already have for this adapter to work?

Your computer needs a standard USB 2.0 Type-A port; the cable plugs directly into that port and requires no additional hardware.

Will the included DB9-to-DB25 adapter let me connect this cable to a legacy 25-pin RS-232 device?

Yes, the supplied DB9-to-DB25 pin adapter converts the cable's DB9 male connector to a DB25 male interface for 25-pin serial equipment.

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