XR82C684JTR/44-F

Overview

The XR82C684JTR/44-F is a quad-channel UART interface integrated circuit manufactured by MaxLinear. It provides four fully independent full-duplex asynchronous communication channels within a single package. The device operates with a supply voltage range of 2.97 V to 5.5 V and supports data rates up to 1 Mb/s per channel. It features a 128-byte storage capacity distributed across the channels. The component is housed in a 44-pin PLCC (PLCC-44) surface-mount package, measuring 16.59 x 16.59 mm. It is rated for an industrial temperature range from -40°C to +85°C. The part is currently classified as obsolete.

Feature Summary

• Quad-channel architecture providing four independent full-duplex asynchronous communication paths
• Integrated internal oscillator and timer/counter functionality
• Supports multiple supply voltages including 2.5 V, 3.3 V, and 5 V

Applications

• Industrial control systems requiring multiple serial ports
• Telecommunications equipment interfaces
• Embedded systems with high-density UART requirements

Procurement Notes

This component is officially discontinued and no longer in production. Verification of availability should focus on surplus or secondary market sources rather than direct manufacturer distribution. Buyers must confirm the specific lot date code and physical condition of available stock. Regulatory compliance status, such as RoHS, should be verified against the specific unit's documentation due to the end-of-life status. Replacement planning is strongly recommended for new designs.

Selection Notes

Designers should evaluate the pin compatibility between the 44-pin PLCC package and their target footprint, noting that the model suffix indicates the specific package type. The 128-byte total FIFO capacity must be assessed against system throughput requirements. Since the device is obsolete, alternative components from the same family or newer generations should be selected for long-term projects. Electrical parameters such as the 1 Mb/s maximum data rate and operating voltage limits must match the system bus specifications.

Part Context

The XR82C684 belongs to the XR82C684 series of UART interface ICs from MaxLinear. This series is designed to provide multi-port serial connectivity in a compact form factor. The JTR/44-F suffix denotes the specific variant with a 44-pin PLCC package and tape-and-reel or cut-tape packaging options. The product line has been succeeded by newer generations offering higher integration or different interface protocols.

Replacement Considerations

Direct pin-to-pin replacements are limited due to the obsolete status. Potential substitutes include other quad-channel UARTs from MaxLinear or competitors with similar PLCC-44 footprints. Engineers should verify register compatibility if migrating within the same brand family.