XR17V258


66 MHz Octal PCI UART

Features

  • High performance 32-bit 66MHz PCI UART
  • PCI 3.0 compliance
  • PCI power management rev. 1.1 compliance
  • EEPROM interface for PCI configuration
  • 3.3V supply with 5V tolerant non-PCI (serial) inputs
  • Data read/write burst operation
  • Global interrupt register for all eight UART channels
  • Up to 8 Mbps serial data rate
  • Eight multi-purpose inputs/outputs
  • A 16-bit general purpose timer/counter
  • Sleep mode with wake-up Indicator
  • Eight independent UART channels controlled with
    • 16C550 compatible register Set
    • 64-byte TX and RX FIFOs with level counters and programmable trigger levels
    • 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 selectable turn-around delay
    • Infrared (IrDA 1.0) data encoder/decoder
    • Programmable data rate with prescaler
  • Pb-Free, RoHS Compliant Versions Offered
Applications

  • Remote Access Servers
  • Storage Network Management
  • Factory Automation and Process Control
  • Instrumentation
  • Multi-port RS-232/RS-422/RS-485 Cards
  • Point-of-Sale Systems

Download Software Drivers

Description

The XR17V2581 (V258) is a single chip 8-channel 66MHz PCI (Peripheral Component Interconnect) UART (Universal Asynchronous Receiver and Transmitter) solution, optimized for higher performance and lower power. The V258 device with its fifth generation register set is designed to meet the high bandwidth and power management requirements for multi-serial communication ports for system administration and management. The 32-bit 66MHz PCI interface is compliant with PCI 3.0 and PCI power management revision 1.1 specifications. The device provides an upgrade path for Exar’s 33MHz 5V and Universal PCI UART family of products in a 144-pin LQFP package.

The V258 consists of eight independent UART channels, each with set of configuration and enhanced registers, 64 bytes of Transmit (TX) and Receive (RX) FIFOs, and a fractional Baud Rate Generator (BRG). A global interrupt source register provides a complete interrupt status indication for all 8-channels to speed up interrupt parsing. The V258 device operates at 33/66MHz and features fully programmable TX and RX FIFO level triggers, automatic hardware and software flow control, and automatic RS-485 half duplex direction control output for software and hardware design simplification.

Note: 1 Covered by U.S. Patents #5,649,122 and #5,949,787

For UART technical support or to obtain an IBIS model for this product, please email Exar's UART Technical Support group.

Part NumberPkg CodeRoHSMin
Temp.
(°C)
Max
Temp.
(°C)
StatusBuy NowOrder Samples
XR17V258IV-FLQFP144LQFP144-4085Active
XR17V258IVTR-FLQFP144LQFP144-4085Active
XR17V258IVLQFP144-4085OBSUpgrade: XR17V258IV-F

Part Status Legend
Active - the part is released for sale, standard product.
EOL (End of Life) - the part is no longer being manufactured, there may or may not be inventory still in stock.
CF (Contact Factory) - the part is still active but customers should check with the factory for availability. Longer lead-times may apply.
PRE (Pre-introduction) - the part has not been introduced or the part number is an early version available for sample only.
OBS (Obsolete) - the part is no longer being manufactured and may not be ordered.
NRND (Not Recommended for New Designs) - the part is not recommended for new designs. 
Specifications
CPUInterfacePCI Bus 3.0
CH8
Max Data Rate @ 5/3.3/2.5/1.8V (Mbps)na/8/na/na
Tx/RxFIFO(Bytes)64/64
Tx/RxFIFOCtrsYes
Program Trigger LevelsYes
AutoRS-485Yes
Fractional Baud Rate Gen.Yes
Pwr Down ModeYes
5VTolInputsYes
Sup V3.0-3.6
No. ofGPIOs8
PkgsLQFP-144
Data Rate@5/3.3/2.5Vna/8/na
Documents
Block Diagram
Datasheets
Software
Software Drivers
Application Notes
Schematics
Manuals
Product Flyer
Product Change Notification