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The XR20M1172IG28TR-F is a UART (Universal Asynchronous Receiver/Transmitter) interface IC manufactured by EXAR Corporation (now part of MaxLinear). Below are its key specifications, descriptions, and features:

Specifications:

• Manufacturer: EXAR (MaxLinear)
• Part Number: XR20M1172IG28TR-F
• Package: 28-pin SSOP (Shrink Small Outline Package)
• Operating Voltage: 2.97V to 5.5V
• Data Rate: Up to 3 Mbps
• Interface Type: UART with I²C/SPI
• Number of Channels: Dual UART
• Operating Temperature Range: -40°C to +85°C
• FIFO Depth: 128 bytes (Tx and Rx)
• Flow Control: Hardware (RTS/CTS) and software (XON/XOFF)
• Additional Features:
• Auto hardware/software flow control
• Auto RS-485 half-duplex direction control
• Programmable baud rate generator
• Sleep mode for power savings

Descriptions:

The XR20M1172IG28TR-F is a dual UART IC that supports I²C and SPI interfaces for communication with a host microcontroller. It is designed for applications requiring high-speed serial communication with low power consumption. The device includes 128-byte FIFOs for both transmit and receive operations, reducing CPU overhead. It also supports RS-485 and RS-232 modes with automatic flow control.

Features:

• Dual UART Channels (independent operation)
• Flexible Interface Options: I²C (up to 3.4 MHz) or SPI (up to 10 MHz)
• Wide Voltage Range: 2.97V to 5.5V
• High-Speed Data Transfer: Up to 3 Mbps
• 128-Byte FIFOs (per channel) for reduced CPU load
• Auto Flow Control: Hardware (RTS/CTS) and software (XON/XOFF)
• RS-485 Support: Auto direction control for half-duplex mode
• Low Power Consumption: Sleep mode for power savings
• Industrial Temperature Range: -40°C to +85°C

This IC is commonly used in industrial automation, embedded systems, networking equipment, and point-of-sale (POS) terminals where reliable UART communication is required.

(Note: For detailed electrical characteristics and pin configurations, refer to the official datasheet.)