The XR16L2551IM is a dual universal asynchronous receiver/transmitter (UART) with 128-byte FIFOs manufactured by Exar Corporation. It provides flexible serial communication capabilities, supporting a wide range of baud rates and data formats. The device is suitable for various embedded systems and computer peripheral applications.

Applications:

• Serial Communication Interfaces
• Embedded Systems
• Computer Peripherals
• Modems
• Printers

Features:

• Dual UART: Provides two independent serial communication channels.
• 128-Byte FIFOs: Reduces CPU overhead for data transfer.
• Programmable Baud Rate Generator: Supports a wide range of baud rates.
• Automatic Hardware/Software Flow Control: Prevents data overrun and underrun.
• Interrupt Generation: Generates interrupts for various events, such as data reception and transmission completion.

Benefits:

• Increased Throughput: Large FIFOs improve data transfer efficiency.
• Reduced CPU Load: Automatic flow control and interrupt generation minimize CPU intervention.
• Flexible Communication: Supports various data formats and baud rates.
• Easy Integration: Simple interface simplifies integration into embedded systems.
• Reliable Operation: Hardware flow control ensures reliable data transfer.

Additional Details:

The XR16L2551IM supports various serial communication parameters, including the number of data bits, parity, and stop bits. The baud rate is programmable using an internal baud rate generator. The device provides various interrupt outputs to signal different events, such as data reception, transmission completion, and error conditions. The automatic hardware and software flow control features prevent data overrun and underrun, ensuring reliable data transfer. Detailed electrical characteristics, such as operating voltage, current consumption, and timing specifications, can be found in the Exar Corporation datasheet. The XR16L2551IM often interfaces with microcontrollers via an industry standard parallel bus.