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 four 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
•Four 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/decoderThe above info is from (www.seekic.com)
Application•Remote Access Servers
•Storage Network Management
•Factory Automation and Process Control
•Instrumentation
•Multi-port RS-232/RS-422/RS-485 Cards
•Point-Of-SalesPinout
Specifications
| CH |
4 |
| CPUInterface |
PCI Bus (3.0) |
| Data Rate@5/3.3/2.5V |
na/8.0/na |
| Tx/RxFIFO(Bytes) |
64/64 |
| Tx/RxFIFOCtrs |
Yes |
| Tx/RxFIFOINT Trig |
Program/ Program |
| AutoRTS/CTS |
Yes |
| IrDaSup |
Yes |
| AutoRS-485 |
Yes |
| 5VTolInputs |
Yes |
| Sup V |
3.3 |
| Pkgs |
LQFP-144 |
| Power Supply Range |
4 Volts |
| Voltage at Any Pin |
-0.5 to 4V |
| Operating Temperature |
-40 to +85 |
| Storage Temperature |
-65 to +150 |
| Package Dissipation |
500 mW |
| Thermal Resistance (20x20x1.4mm 144-LQFP) |
theta-ja = 42, theta-jc = 8 |
Edited by (www.seekic.com) ,the biggest IC PDF and datasheet download site.
Description
The XR17V2541 (V254) is a single chip 4-channel 66MHz PCI (Peripheral Component Interconnect) UART (Universal Asynchronous Receiver and Transmitter) solution, optimized for higher performance and lower power. The V254 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 V254 consists of four 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 4 channels to speed up interrupt parsing. The V254 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.
1Covered 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.
XR17V254 Data Sheet
