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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

  • Connector count2
  • Connector detailsExternal Ports: 1 - DB-25 (25 pin; D-Sub) Male External Port
  • Connector genderMale to Male
  • Audio qualityUSB powered,No external power adapters needed Supports seria
  • Product typeCable Connectors
  • Product colorBlack

Style DB9 or DB25

  • 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.

How it compares

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

Price $18.99
Cheaper than about 58% of the 93 comparable items (median $21.99).

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Specifications

Product
Brand nameStarTech.com
Model nameICUSB232DB25
Product typeCable Connectors
Product colorBlack
Ports & slots
Connector count2
Connector detailsExternal Ports: 1 - DB-25 (25 pin; D-Sub) Male
External Ports: 1 - DB-9 (9 pin; D-Sub) Male
Connector genderMale to Male
Size & build
Overall length3 ft (0.91 m)
Shipping weight0.15 kg
Package size170 × 145 × 32 mm

Other versions of this model

2 more in the same range

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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