XR17V258IV

Overview

The XR17V258IV is an octal UART interface integrated circuit manufactured by MaxLinear, Inc. It provides eight independent serial communication channels within a single package. The device supports data rates up to 8 Mbps and includes a 64-byte FIFO buffer per channel to manage data flow efficiently. It operates with supply voltages of 3.3V or 5V and utilizes a 144-LQFP (20x20 mm) surface-mount package. Key protocol support includes RS485 signaling. The component integrates automatic flow control, IrDA encoder/decoder capabilities, modem control signals, and false start bit detection features for robust serial connectivity.

Feature Summary

• Octal UART architecture providing eight independent serial ports in a compact form factor
• Integrated 64-byte FIFO buffers per channel to enhance data throughput and reduce CPU overhead
• Supports high-speed data transmission up to 8 Mbps with RS485 protocol compatibility
• Includes advanced signal integrity features such as automatic flow control and false start bit detection

Applications

• Industrial automation systems requiring multiple serial connections
• Telecommunications infrastructure equipment
• Embedded systems needing high-density UART interfaces
• Data acquisition systems with multi-channel serial input/output

Procurement Notes

Verify the current lifecycle status before procurement, as this component may be discontinued. Confirm that the 144-LQFP package dimensions match your PCB footprint design. Ensure voltage requirements align with your system's 3.3V or 5V rails. Check for any specific environmental certifications if used in regulated industries. Validate that the manufacturer source is authorized to avoid counterfeit risks.

Selection Notes

Select this component when eight UART channels are required in a space-constrained design. Consider the 64-byte FIFO depth against your application's burst data requirements. Verify compatibility with RS485 networks if differential signaling is needed. Evaluate the 144-LQFP package for thermal management and soldering feasibility. Compare against newer PCIe-based alternatives if future scalability is a priority.

Part Context

The XR17V258IV belongs to the XR17V25x series of UART controllers from MaxLinear. It is part of a family designed for high-performance serial communication in industrial and telecom applications. This specific model focuses on PCI bus interface compatibility with octal channel density. It serves as a legacy solution for systems transitioning from discrete UART components to integrated multi-port controllers.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Consult MaxLinear technical support for direct replacements or pin-compatible alternatives. Review datasheet errata for any known functional updates that might affect substitution decisions.