You are using an outdated browser. For a faster, safer browsing experience, upgrade for free today.

Computer Add-on Cards

  • Your shopping cart is empty!

PCIe x1 XR17V354 4-port RS422/485 Serial Adapter Card with 16550 UART

  • Product Code: PX1-4S-422
  • Availability: In Stock
  • Ships: Typically within 3 Business Days
  • Guarantee: 30-day Return and Money Back


The XR17V354 (V354) is a single chip 4-channel PCI Express (PCIe) UART (Universal Asynchronous Receiver and Transmitter), optimized for higher performance and lower power. The V354 serves as a single lane PCIe bridge to 4 indepedent enhanced 16550 compatible UARTs. The V354 is compliant to PCIe 2.0 Gen 1 (2.5GT/s).

In addition to the UART channels, the V354 has 16 multi-purpose I/Os (MPIOs), a 16-bit general purpose counter/timer and a global interrupt status register to optimize interrupt servicing.

Each UART of the V354 has many enhanced features such as the 256-bytes TX and RX FIFOs, programmable Fractional Baud Rate Generator, Automatic Hardware or Software Flow Control, Auto RS-485 Half-Duplex Direction Control, programmable TX and RX FIFO Trigger Levels, TX and RX FIFO Level Counters, infrared mode, and data rates up to 25Mbps.


  • Single 3.3V power supply
  • Internal buck regulator for 1.2V core
  • PCIe 2.0 Gen 1 compliant
  • x1 Link, dual simplex, 2.5Gbps in each direction
  • Expansion bus interface
  • EEPROM interface for configuration
  • Data read/write burst operation
  • Global interrupt status register for all four UARTs
  • Up to 25 Mbps serial data rate
  • 16 multi-purpose inputs/outputs (MPIOs)
  • 16-bit general purpose timer/counter
  • Sleep mode with wake-up Indicator
  • Two independent UART channels controlled with
  • 16550 compatible register Set
  • 256-byte TX and RX FIFOs
  • Programmable TX and RX Trigger Levels
  • TX/RX FIFO Level Counters
  • Fractional baud rate generator
  • Automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis
  • Automatic Xon/Xoff software flow control
  • RS-485 half duplex direction control output with programmable turn-around delay
  • Multi-drop with Auto Address Detection
  • Infrared (IrDA 1.1) data encoder/decoder


  • Hardware
    • Communication controller: 16C550 UART Compatible register Set
    • Bus: PCIe 2.0 Gen 1 compliant , X1 Link, dual simplex, 2.5Gbps in each direction
    • Connector: DB44 Female
  • Serial Interface
    • Number of ports: 4 ports
    • Serial Standard: RS-422 (Point to Point mode), RS-485 (2 Wire RS-485 mode), 4 Wire RS-485 (Multi-Drop RS-422 mode)
    • IRQ and I/O Address: Assigned by System
  • Serial Line Protection
    • ESD Protection: 15KV ESD Protection for all signals
    • Surge Protection: 600W Surge Protection for RS-422/485 signals
  • Performance
    • Baud rate: up to 921.6 Kbps
    • FIFOs: 256 byte
  • Serial Communication Parameters
    • Data Bits: 5, 6, 7, 8
    • Stop Bits: 1, 1.5, 2
    • Parity: None, Even, Odd, Space, Mark
  • Serial Signals
    • RS-422: TxD+, TxD- RxD+, RxD-, GND
    • 2 Wire RS-485: Data+, Data-, GND
    • 4 Wire RS-485: TxD+, TxD-, RxD+, RxD-, GND
  • System Requirements
    • Windows Server 2003, 2008, 2012, Windows XP, Vista, Win 7, Win 8
    • Linux 2.6.27, 2.6.31, 2.6.32, 3.x.x and newer
    • PCI Express-enabled system with an available PCI Express slot
  • Physical Characteristics
    • Bracket: Standard and Low Profile Bracket
    • Bracket Space: 1
    • Operating Temperature:-40 ~ 85°C

Package Contents

  • 1 x PCIE 17V354 RS485/422 Serial Card (1 to 4 Port Cable Included)
  • 1 x Driver CD
  • 1 x User Manual
  • 1 x Low Profile Bracket

There are no reviews for this product.

Write a review

Note: HTML is not translated!
    Bad           Good