XR16V554IJ

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The XR16V554IJ is a quad universal asynchronous receiver/transmitter (UART) integrated circuit manufactured by Sipex. It integrates four independent UART channels with a 16-byte transmit and receive FIFO buffer for each channel, supporting data rates up to 3 Mbps. The device operates on a single 3.3V power supply and features an internal oscillator that eliminates the need for external crystals. It supports RS-232 and RS-485 communication standards and includes hardware flow control signals such as RTS, CTS, DTR, DSR, RI, and DCD. The component is designed for industrial applications and is available in a 44-pin TQFP package.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Integrates four independent UART channels with 16-byte FIFO buffers to reduce CPU overhead and improve throughput efficiency.
• Features an internal oscillator system that removes the requirement for external crystal components, simplifying board layout.
• Supports full hardware handshaking with standard RS-232 and RS-485 signal compatibility for robust serial communication.
• Operates on a single 3.3V power supply, ensuring compatibility with modern low-voltage digital systems.

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial automation controllers requiring multiple serial communication ports.
• POS terminals and payment systems utilizing RS-232 interfaces.
• Embedded systems needing RS-485 multi-drop network connectivity.
• Telecommunications equipment with high-speed serial data transfer requirements.

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer designation carefully, as Sipex was acquired by Exar Corporation, which is now part of Dialog Semiconductor (Renesas). Ensure the specific suffix 'IJ' corresponds to the correct temperature range and package variant. Request official datasheets from authorized distributors to confirm current production status and authenticity, as legacy components may have limited availability or be subject to obsolescence notices.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a design requires four independent serial ports within a single IC footprint. It is suitable for applications demanding high data rates up to 3 Mbps without external clock sources. Compare pin compatibility with other quad UARTs if space constraints are critical. Verify voltage level compatibility with the target system's logic levels, as this device is optimized for 3.3V operation.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The XR16V554 series belongs to the family of high-performance quad UARTs designed for complex embedded environments. It serves as a bridge between parallel microprocessor buses and serial communication lines. The 'IJ' suffix typically denotes a specific industrial temperature range and TQFP packaging configuration, distinguishing it from commercial grade or alternative package options within the same functional family.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Potential substitutes include the MAX13484E or ST16C554IV variants, provided pinouts and electrical characteristics match the original design. Verify FIFO depth and operating voltage compatibility before substitution. Consult manufacturer cross-reference guides for confirmed equivalent parts to ensure functional parity in existing PCB layouts.