The PEX4S553B 4-Port PCI Express Serial Card (with breakout cable) lets you add 4 RS232 serial ports using a single PCIe expansion slot, with an included 1-to-4 cable enabling you to add 4 serial ports to a single low profile slot.

It features a native single-chip design that provides optimum reliability and speed, reducing the CPU load by up to 48% over conventional bridge-chip serial cards - a cost-effective solution for connecting legacy serial devices to PCIe-enabled computers.

• Native single chip design

• Includes a full profile and low profile/half-height bracket

• On chip 256-byte depth FIFO in transmit/receive path of each port

• Single-Lane (x1) PCI-Express with throughput up to 2.5Gbps

• Supports hardware and software flow control

• Supports re-map function for legacy ports (Supported OS's only)

• Supports data transfer rates up to 250Kbps on each port

• Compliant with PCI Express base specifications revision 1.0a

• Automated out-of-band flow control using CTS/RTS and DSR/DTR

The multi-port serial adapter includes both full profile and low profile/half-height brackets for compatibility with standard and small form factor computers, and is compatible with a broad range of operating systems, including Windows®, Linux, and MAC OS.