Product Description
   The PI7C9X7954 is a PCI Express® Quad UART (Universal Asynchronous Receiver-Transmitters) I/O Bridge. It is specifically designed to meet the latest system requirements of high performance, lead (Pb) -free and reduced package sizes. The bridge can be used in a wide range of applications such as Remote Access Servers, Automation, Process Control, Instrumentation, POS, ATM and Multi-port RS232/RS422/RS485 Cards. 

FEATUREs
◾ Support 4 high performance 16C950 UART in single
   chip
◾ Fully software compatible with 16C550-type device
   drivers
◾ 128-byte transmit and receive FIFO
◾ Flexible clock pre-scaler from 4 to 46
◾ Automated in-band flow control using programmable
   Xon/ Xoff in both directions
◾ Automated out-of-band flow control using CTS#/ RTS#
   and/or DSR#/ DTR#
◾ Arbitrary trigger levels for receiver and transmitter
◾ FIFO interrupts and automatic in-band and out-band flow
   control
◾ Data framing sizes: 5, 6, 7, 8 and 9
◾ Configurable using non-volatile configuration memory
   (EEPROM)
◾ Global Interrupt Status and readable FIFO levels to
   facilitate implementation of efficient device drivers.
◾ Operation via IO or memory mapping
◾ Detection of bad data in the receive FIFO
◾ Baud rate up to 15 Mbps in asynchronous mode.
◾ Supports up to 256-byte maximum payload size
◾ 1.8 and 3.3V operation
◾ Power dissipation: 0.8 W typical in normal mode
◾ Industrial Temperature Range -40o to 85o
◾ Package: 14x14mm, 128-pin LQFP, Pb free and 100%
   Green.

APPLICATIONs
◾ Remote Access Servers
◾ Network / Storage Management
◾ Factory Automation and Process Control
◾ Instrumentation
◾ Multi-port RS-232/ RS-422/ RS-485 Cards
◾ Point-of-Sale Systems (PoS)
◾ Industrial Control (IPC)
◾ Gaming Machines
◾ Building Automation
◾ Embedded Systems