XR16V554IV

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The XR16V554IV is a quad universal asynchronous receiver/transmitter (UART) integrated circuit manufactured by Sipex. It integrates four independent UART channels, each equipped with a 16-byte FIFO buffer for both transmit and receive operations. The device supports data rates up to 3 Mbaud and operates within a supply voltage range of 3.0 V to 5.5 V. It features full hardware flow control support via RTS/CTS and DTR/DSR signals. The component is housed in a 48-lead TQFP package and is designed for industrial temperature ranges.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Integrates four independent UART channels with dedicated 16-byte transmit and receive FIFOs to reduce CPU overhead.
• Supports full hardware flow control using RTS, CTS, DTR, and DSR signals for reliable serial communication.
• Features low power consumption modes including automatic power-down when no activity is detected on the line.

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial automation systems requiring multiple serial connections
• Telecommunications equipment with multi-port interface needs
• Point-of-sale terminals and embedded control systems

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer designation as Sipex or Exar, as corporate acquisitions may affect part marking. Confirm the IV suffix corresponds to the industrial temperature grade (-40°C to +85°C). Ensure the 48-lead TQFP package dimensions match the target PCB footprint. Check for RoHS compliance status if required by specific regional regulations.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when four isolated serial ports are required in a single package. The 16-byte FIFO depth is suitable for moderate throughput applications where DMA is not available. Compare against dual-channel alternatives if fewer ports suffice. Verify voltage compatibility with the host system logic levels before integration.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the XR16V55x family of quad UARTs. It shares functional similarities with the XR16V552 but offers double the channel count. The IV variant specifically denotes the industrial temperature rating. It serves as a direct replacement for older quad UART designs in legacy industrial hardware.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The XR16V554IL-F from MaxLinear/Exar is a pin-compatible alternative. Verify that the FIFO depth and register mapping remain identical to ensure software compatibility without modification.