XR82C684J-F

Overview

The XR82C684J-F is a quad-channel UART interface integrated circuit manufactured by MaxLinear. It features four fully independent full-duplex asynchronous communication channels with 3-byte transmit and receive FIFOs for each channel. The device supports data rates up to 1 Mb/s and operates on a single 5 V power supply, with a specified operating voltage range of 4.75 V to 5.25 V. It draws a typical operating current of 15 mA and functions within an industrial temperature range from -40°C to +85°C. The component is housed in a 44-pin PLCC surface-mount package.

Feature Summary

• Provides four independent full-duplex asynchronous communication channels
• Includes 3-byte transmit and receive FIFOs per channel to manage data flow
• Supports both Intel and Motorola bus interfaces for system compatibility

Applications

• Industrial control systems requiring multiple serial ports
• Telecommunications equipment utilizing standard UART protocols
• Embedded systems needing high-reliability serial communication interfaces

Procurement Notes

This component is officially listed as End-of-Life (EOL) by the manufacturer. Availability is restricted, and sourcing may require checking secondary market distributors or verifying specific stock conditions. Engineers should review the Product Discontinuance Notification for detailed transition timelines and last-time buy information before finalizing procurement plans.

Selection Notes

Select this part when designing systems that require four distinct UART channels within a single package. Ensure the design environment supports a strict 5 V logic level, as the device does not support lower voltage operation. Verify that the PCB layout accommodates the PLCC-44 footprint and that the thermal management strategy aligns with the specified -40°C to +85°C operating range.

Part Context

The XR82C684J-F belongs to the XR82C684 series of VLIO UARTs produced by MaxLinear. This series is designed to provide robust serial communication capabilities for legacy and modern embedded applications. The J suffix typically denotes the industrial temperature grade, distinguishing it from commercial variants.

Replacement Considerations

As the XR82C684J-F is discontinued, engineers must evaluate alternative quad-channel UARTs. Potential replacements include other parts from the XR82C684 family if available, or newer MaxLinear UART solutions. Cross-reference pinouts and FIFO depths carefully to ensure functional equivalence in existing designs.