XR16C854IQ-F

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The XR16C854IQ-F is a quad enhanced Universal Asynchronous Receiver/Transmitter (UART) interface integrated circuit manufactured by MaxLinear. It features four independent UART channels, each equipped with 128-byte transmit and receive FIFOs to minimize CPU intervention. The device supports data rates up to 2 Mb/s and operates within a supply voltage range of 2.97 V to 5.5 V, compatible with both 3.3 V and 5 V systems. It is housed in a 64-pin LQFP package and functions across an industrial temperature range of -40°C to +85°C. The IC supports Intel and Motorola bus interfaces for flexible system integration.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Quad channel architecture with dedicated 128-byte TX and RX FIFOs per channel
• Support for high-speed asynchronous serial communication up to 2 Mb/s
• Dual bus compatibility supporting both Intel and Motorola interface protocols
• Wide operating voltage range accommodating 3.3 V and 5 V logic levels

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial automation control systems requiring multiple serial ports
• Telecommunications equipment utilizing RS-232 or RS-485 interfaces
• Embedded computing platforms needing high-throughput serial I/O
• Test and measurement instruments with multi-channel data acquisition

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the specific suffix 'IQ' against the manufacturer's current datasheet to confirm pinout and electrical characteristics match your design requirements. Check for Product Change Notifications (PCN) or End-of-Life (EOL) notices from MaxLinear, as component availability and manufacturing sources may have changed following corporate acquisitions. Ensure compliance with RoHS directives if required by your regional regulations.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a single IC must provide four independent UART interfaces with deep buffering capabilities. The 128-byte FIFOs are critical for applications involving burst data transfers or variable latency buses. Verify that the LQFP-64 package fits your PCB footprint constraints and that the 2.97 V to 5.5 V input range aligns with your system's power rails. Consider thermal dissipation requirements for the LQFP package in enclosed enclosures.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the XR16C854D series of quad UARTs from MaxLinear. It serves as a high-performance serial interface solution, often replacing legacy discrete UART components or lower-capacity multi-UART chips. The 'IQ' suffix typically denotes the package type (LQFP) and industrial temperature rating, distinguishing it from other variants like the DIV package.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Direct pin-to-pin replacements may include the ST16C854IQ variant. Cross-reference with the XR16V854 series for potential upgrades, though FIFO depths and voltage ranges may differ. Always verify register compatibility and timing parameters before substituting, as internal architecture changes between Exar and MaxLinear generations can affect software drivers.