GENERAL DESCRIPTION 

The XR16L7881 (788), is a 2.97V to 5.5V with 5V tolerant inputs octal Universal Asynchronous Receiver and Transmitter (UART). The highly integrated device is designed for high bandwidth requirement in communication systems. The global interrupt source register provides a complete interrupt status indication for all 8 channels to speed up interrupt parsing. Each UART has its own 16C550 compatible set of configuration registers, TX and RX FIFOs of 64 bytes, fully programmable transmit and receive FIFO trigger levels, TX and RX FIFO level counters, automatic RTS/CTS or DTR/DSR hardware flow control with programmable hysteresis, autoamtic software (Xon/Xoff) flow control, RS-485 half-duplex direction control with programmable turn-around delay, Intel or Motorola bus interface and sleep mode with a wake-up indicator.

APPLICATIONS

• 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 Cards

FEATURES

• 2.97V to 5.5V with 5V Tolerant Inputs Operation

• Single Interrupt Output for all 8 UARTs

• Global Interrupt Source for all 8 UARTs

• 5G “Flat” UART Registers for Configurations

• Simultaneous UART Channels Initialization

• Auto RS485 Half-duplex Control with Programmable Turn-around Delay

• A General Purpose 16-bit Timer/Counter

• Sleep Mode with Wake-up Indication

• Highly Integrated Device for Space Saving

• First eight registers are 16C550 compatible

• 64-byte Transmit and Receive FIFOs

• Transmit and Receive FIFO Level Counters

• Programmable TX and RX FIFO Trigger Levels

• Automatic RTS/CTS or DTR/DSR Flow Control

• Selectable Hardware Flow Control Hysteresis

• Automatic Xon/Xoff Software Flow Control with

Status Indicator

• Infrared (IrDA 1.0) Data Encoder/Decoder

• Programmable Data Rate with Prescaler

• Up to 6.25 Mbps Serial Data Rate at 5V

• 100-pin QFP Package (14x20x3 mm)