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Diamond Point International

Quatech Serial PCMCIA - 2 & 4 port PCMCIA To RS-232

RS-422/485, RS-232/422/485 and RS-232 to Ethernet, Wide Temperature


Quatech RS-232 and RS-422/485 asynchronous serial PCMCIA cards are an ideal solution for adding additional ports to a wide variety of portable systems. Because they share electronic fundamentals with native bus architectures such as PCI and ISA, they function exactly like standard COM ports and can be addressed as such by most application software.

Quatech serial PCMCIA cards provide industry leading speeds of up to 921.6 kbps by employing a clock multiplying feature in conjunction with 16750 UARTs. To further increase performance, we have created an auto toggle feature for the RS-422/485 transmitter that permits the hardware itself to regulate data flow by only driving lines while actively transmitting--providing increased speed and convenience over the older software controlled method.

Note that Quatech were acquired by B&B Electronics in 2011.



Interface2 RS-232 serial ports
16750 UARTs with 64-byte FIFOs (1 per port)
RS-232 Transceivers: 1CL 3245 or compatible
RS-232 Receive Buffers: Voltage Range: +25V (max), -25V (min), Transition Time (THL-TLH): 25 Ns (typ)
RS-232High Level Output: +5V (min), +5.4V (typ)
Low Level Output: -5V (min), -5.4V (typ)
Transition Time (THL-TLH): 25 ns (typ)
Data Rates921.6 kbps (max)
• Data Rate: 10/100 Mbps Auto-detecting 10BaseT or 1000BaseTx
• Protocols: TCP, IP, ARP, DHCP, Telnet, HTTP, UDP, ICMP
Connector(s)Removable Cable with 2 DB-9 male


Expansion16-bit PCMCIA, Release 8 & backward compliant
ElectricalCompatible with 3.3V & 5V systems.
DSP: 30mA @ 5V (typ), 45mA (max)
MechanicalType II PCMCIA Card package
SoftwareWindows CE/9x/Me/NT/2000/XP/Vista/7, Linux, OS/2
TemperatureTemperature range (operation): 0 to +70°C
Humidity10% to 90%
Safety/CertificationCE, FCC Class B, RoHS
Warranty1 Year

Ordering Details

BoardDSP-100 PCMCIA To RS-232 2 Port Card

Note that all other variants (SSP-100, SSPR-100, DSPR-100, QSP-200, SSP-200/300 DSP-200/300, QSP-200/300 are EOL and are no longer available.