MaxLinear XR16C864IQ-F

The XR16C864 (864) is an enhanced quad Universal Asynchronous Receiver and Transmitter (UART) each with 128 bytes of transmit and receive FIFOs, transmit and receive FIFO counters and trigger levels, automatic hardware and software flow control, automatic RS - 485 half - duplex direction control and data rates of up to 2 Mbps. Each UART has a set of registers that provide the user with operating status and control, receiver error indications, and modem serial interface controls. System interrupts may be tailored to meet design requirements. An internal loopback capability allows onboard diagnostics. The 864 is available in the 100 - pin QFP package. The XR16C864 offers faster channel status access by providing separate outputs for TXRDY and RXRDY, offer separate Infrared TX outputs and a separate clock input for channel C (CHCCLK). The XR16C864 is compatible with the industry standard ST16C654 and XR16C854. The XR16C864 (864) integrates the functions of 4 enhanced 16C550 Universal Asynchronous Receiver and Transmitter (UART). Each UART is independently controlled having its own set of device configuration registers. The configuration registers set is 16550 UART compatible for control, status and data transfer. Additionally, each UART channel has 128 - bytes of transmit and receive FIFOs, automatic RTS/CTS hardware flow control with hysteresis control, automatic Xon/Xoff and special character software flow control, programmable transmit and receive FIFO trigger levels, FIFO level counters, infrared encoder and decoder (IrDA ver 1.0), programmable baud rate generator with a prescaler of divide by 1 or 4, and data rate up to 2 Mbps. The XR16C864 can operate at 3.3 or 5 volts. The 864 is fabricated with an advanced CMOS process.

• Added feature in devices with top mark date code of "F2 YYWW" and newer:
• 5 volt tolerant inputs
• 2.97 to 5.5 Volt Operation
• Pin - to - pin compatible with the industry standard ST16C654 and XR16C854
• Intel or Motorola Data Bus Interface select
• Four independent UART channels
• Register Set Compatible to 16C550
• Data rates of up to 2 Mbps
• Transmit and Receive FIFOs of 128 bytes
• Programmable TX and RX FIFO Trigger Levels
• Transmit and Receive FIFO Level Counters
• Automatic Hardware (RTS/CTS) Flow Control
• Selectable Auto RTS Flow Control Hysteresis
• Automatic Software (Xon/Xoff) Flow Control
• Wireless Infrared (IrDA 1.0) Encoder/Decoder
• Crystal oscillator or external clock input

• Portable Appliances
• Telecommunication Network Routers
• Ethernet Network Routers
• Cellular Data Devices
• Factory Automation and Process Controls