The XR17D158CV is an octal UART (Universal Asynchronous Receiver/Transmitter) with a shared IRQ. Manufactured by Exar Corporation, this device is designed to provide a flexible and efficient solution for serial communication in various applications. It offers enhanced features such as automatic hardware and software flow control, fractional baud rate generator, and a large FIFO (First-In, First-Out) buffer for each UART, improving system performance and reliability.

Applications:

• Serial port expansion: Used in systems requiring multiple serial ports, such as industrial computers and data acquisition systems.
• Embedded systems: Integrated into embedded systems for communication with peripherals and other devices.
• Point-of-Sale (POS) systems: Used in POS terminals for connecting to barcode scanners, receipt printers, and other serial devices.
• Networking equipment: Found in routers, switches, and other networking devices for console management and configuration.
• Industrial automation: Employed in industrial control systems for communication with sensors, actuators, and PLCs (Programmable Logic Controllers).

Features:

• Octal UART: Provides eight independent UART channels in a single chip.
• Shared IRQ: Simplifies interrupt handling by using a single interrupt request line for all UART channels.
• Automatic hardware and software flow control: Prevents data loss due to buffer overflow.
• Fractional baud rate generator: Allows for precise baud rate selection, ensuring compatibility with a wide range of serial devices.
• Large FIFO buffer: Reduces CPU overhead by buffering data, allowing the CPU to process data in larger chunks.
• Data rates up to 3 Mbps: Supports high-speed serial communication.
• Low power consumption: Designed for energy-efficient operation.

Benefits:

• Increased system performance: The large FIFO buffers and automatic flow control reduce CPU overhead and prevent data loss, resulting in improved system performance.
• Simplified system design: The shared IRQ and flexible baud rate generator simplify system design and reduce development time.
• Reduced board space: Integrating eight UART channels into a single chip reduces board space and cost.
• Enhanced reliability: Automatic flow control and error detection features ensure reliable data transmission.
• Lower power consumption: Low-power design extends battery life in portable applications.

Additional Details:

The XR17D158CV operates from a single 3.3V or 5V power supply and is available in a variety of packages. It is fully compatible with industry-standard UART interfaces and supports a wide range of baud rates. The device also includes advanced features such as automatic RS-485 transceiver control and support for 9-bit data format. Its extensive feature set and robust design make it an ideal solution for demanding serial communication applications.