Quatech/B&B Performance PCIe based RS-232 Serial ExpressCards

ExpressCard to Serial I/O More Like This Quatech/B&B's high performance ExpressCard 34 to Serial I/O cards adds fast serial COM ports to mobile computers for attaching fax/modems, bar code scanners, court reporters, data acquisition equipment, mag stripe readers, GPS receivers, digital cameras or other RS-232 serial devices. Unlike other ExpressCard Serial adapters, Quatech/B&B's utilize the PCIe portion of the ExpressCard standard.

Advantages of a PCIe-based ExpressCard design are in the interface to the laptop's motherboard. The PCIe bus interface is the successor to the PCI bus, which in turn was the successor to the ISA bus to which built-in ports were originally attached. As such, the ExpressCard adapter design utilizes a PCIe-based design and can still directly use I/O space addresses and interrupts, thus more closely emulating built-in ports than can be done via USB-based design. Moreover, because there's no USB stack for the drivers to contend with, throughput can be higher and latency will be lower (considerably so in many cases). Due to improved data transfer rate, the ExpressCard is considerably more efficient for multi-tasking operations. The PXPseries support data rates of up to 921.6Kbps, which provides steady flow of data throughput.

Part Number and Description Price Add to Cart
EXP34-SSPXP-100 Quatech/B&B 1 port Performance PCIe based RS-232 Serial ExpressCard N/A SOLD OUT
EXP34-DSPXP-100 Quatech/B&B 2 port Performance PCIe based RS-232 Serial ExpressCard N/A SOLD OUT
EXP34-QSPXP-100 Quatech/B&B 4 port Performance PCIe based RS-232 Serial ExpressCard N/A SOLD OUT
Optional Accessories
EXP34-54SLOTGUARD Synchrotech SlotGuardExpress ExpressCard/34 Stabilizer Insert for ExpressCard/54 Slots More Information - View Product Pages

Features and Specifications


CE Mark

Vista Ready

Seven Ready

  • True serial emulation
  • New generation of I/O expansion for notebooks
  • Adds 1, 2 or 4 high-speed PCIe-based serial ports
  • Supports PCI Express Base Specification Revision 1.1a
  • Built-in 1024-byte FIFOs buffers increase data transmit/receive speed
  • Baud rates up to 115.2 Kbps with 16550-based serial units (for SSPX model)
  • Baud rates up to 921.6Kbps (for SSPXP and DSPXP models)
  • Supports Windows XP/Vista/7 operating systems
  • High speed ExpressCard with plug-n-play
  • Hot plugging and how swapping features
  • Meets FCC and CE safety standards
  • Installs in any ExpressCard slot
Warranty Information
  • Manufacturer's 5 Year Limited Warranty
Bus Interface
  • ExpressCard Standard: PCI Express based Designs Specification, Revision 1.1 compliant interface
RS-232 Features
  • Data FIFO: 1024-byte
  • UARTS: 16450/550/750-compatible register set
  • Data Bits Supports 5, 6, 7, 8; Supports even, odd, mark, space and no parity; Supports 1, 1.5 and 2 stop bits
  • TIA-232-F(RS-232) compliant
Baud Rates
  • Up to 921.6kbps per port
  • SSPXP: Provides One (DB9 Male) RS232 Serial Ports for device connections
  • DSPXP: Provides Two (DB9 Male) RS232 Serial Ports for device connections
  • QSPXP: Provides Four (DB9 Male) RS232 Serial Ports for device connections
System Requirements PC
  • ExpressCard slot equipped computer
  • Windows XP/Vista/7 (32 and 64 bit versions of The Vista supported)
Standards Conformance
  • FCC, CE
  • ExpressCard 1.0 (PCIe)
Physical Characteristics
  • Dimensions: 34 x 75 x 5mm (not including extended portion of card)
  • Weight: 24g (approximate)
Electrical Characteristics
  • 3.3V ± 0.3V directly from ExpressCard socket
  • 500mA (max.)
Operating Environment
  • Operating temperature: 0° C to 55° C
  • Relative Humidity: 90% (max.) non-condensing
Package Includes
  • ExpressCard 34 to RS-232 Card
  • RS-232 Serial Connectors, count depends on model


W3 Document ExpressCard FAQ for ExpressCard 34 and ExpressCard 54
Answers a broad range of ExpressCard questions including form factor, compatibility, etc.
W3 Document Serial Standards Primer

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