XR16V2551IL

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The XR16V2551IL is a dual universal asynchronous receiver/transmitter (DUART) integrated circuit manufactured by Sipex. It integrates two independent UART channels with 16-byte transmit and receive FIFOs on a single chip, designed to replace standard 16C450/16C550 devices. The component supports baud rates up to 3 Mbps and operates from a single +5V power supply. It features full hardware flow control via RTS/CTS and DTR/DSR signals, as well as software programmable flow control. The device includes an internal oscillator for clock generation and supports RS-232, RS-422, and RS-485 communication standards.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual independent UART channels with 16-byte FIFO buffers to reduce CPU overhead
• Full hardware flow control support using RTS, CTS, DTR, and DSR signals
• Internal oscillator eliminates the need for external crystal components
• Compatible with standard RS-232, RS-422, and RS-485 interface protocols

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial automation systems requiring reliable serial communication
• Point-of-sale (POS) terminals and cash registers
• Medical equipment with serial data logging capabilities
• Telecommunications infrastructure and network interfaces

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer designation carefully, as Sipex assets were acquired by MaxLinear. Ensure the specific suffix matches the required package type and temperature range. Confirm RoHS compliance status through official documentation, as legacy parts may have varying environmental declarations depending on production batch dates.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when system design requires two independent serial ports within a compact footprint. The integrated 16-byte FIFOs are critical for applications involving high-speed data transfer where CPU intervention must be minimized. Verify that the operating voltage aligns with the system's +5V logic levels and that the thermal performance meets the requirements of the intended enclosure environment.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the XR16V255x family of DUARTs, which are widely used in embedded systems. The 'IL' suffix typically denotes a specific package configuration and industrial temperature rating. These devices serve as direct pin-compatible replacements for older 16C450 and 16C550 UARTs, facilitating upgrades in existing designs without significant PCB layout changes.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Direct pin-compatible substitutes include the XR16V2551IM and XR16V2551CM. Cross-reference with MaxLinear datasheets to confirm electrical parameter equivalence. Verify that any alternative maintains the same 16-byte FIFO depth and interrupt handling characteristics to ensure software compatibility.