Features: • High Performance Quad UART
• PCI Bus 2.2 Target Interface Compliance
• 5V PCI Bus Compliant up to 33MHz Clock
• 32-bit PCI Bus Interface with EEPROM Interface
• A Global Interrupt Source Register for all 4 UARTs
• Data Transfer in Byte, Word and Double-word
• Data Read/Write Burst Operation
• Each UART is independently Controlled with:
• 16C550 Compatible 5G (Fifth Gen Register Set
• 64-byte Transmit and Receive FIFOs
• Transmit and Receive FIFO Level Counters
• Automatic RTS/CTS or DTR/DSR Flow Control
• Automatic Xon/Xoff Software Flow Control
• Automatic RS485 Half-duplex Control Output with 16 Selectable Turn-around Delay
• Infrared (IrDA 1.0) Data Encoder/Decoder
• Programmable Data Rate with Prescaler
• Up to 6.25 Mbps Serial Data Rate at 8X and 5V
• Eight Multi-Purpose Inputs/outputs
• A General Purpose 16-bit Timer/Counter
• Sleep Mode with Automatic Wake-up Indicator
• Same Package and Pin-out as the XR17C158, XR17D154 and XR17D158 UART
• 20x20x1.4mm 144-TQFP packageApplication• Remote Access Servers
• Ethernet Network to Serial Ports
• Network Management
• Factory Automation and Process Control
• Point-of-Sale Systems
• Multi-port RS-232/RS-422/RS-485 CardsPinout
Specifications
| CH |
4 |
| CPUInterface |
PCI Bus (2.2) |
| Data Rate@5/3.3/2.5V |
6.2/na/na @8X |
| 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 |
5 |
| Pkgs |
LQFP-144 |
Power Supply Range7 Volts
Voltage at Any Pin -0.5 to 7V
Operating Temperature -40o to +85
Storage Temperature -65o to +150
Package Dissipation 500 mW
Thermal Resistance (20x20x1.4mm 144-TQFP) theta-ja = 42, theta-jc = 8Description
The XR17C1541 is a four-channel PCI Bus Universal Asynchronous Receiver and Transmitter (UART) with same package and pin-out as Exar's XR17C158 octal UART. The device is designed to meet today's 32-bit PCI Bus and high bandwidth requirements in communication systems. The global interrupt source register provides a complete interrupt status indication for all four channels to speed up interrupt parsing.
Each XR17C154 UART is independently controlled and has its own 16C550-compatible 5G register set, transmit and receive FIFOs of 64 bytes, fully programmable transmit and receive FIFO trigger levels, transmit and receive FIFO level counters, automatic hardware flow control with programmable hysteresis, automatic software (Xon/Xoff) flow control, IrDA (Infrared Data Association) encoder/decoder, 8 multi-purpose definable inputs/outputs, and a 16-bit general purpose timer/counter.
NOTE: 1 Covered by U.S. Patents #5,649,122 and #5,832,205
For UART technical support or to obtain an IBIS model for this product, please email Exar's UART Technical Support group.
XR17C154 Data Sheet
