XR16V2551IM

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The XR16V2551IM 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. The device supports data rates up to 3 Mbps and operates from a single +5V power supply. It features full hardware flow control, including RTS/CTS and DTR/DSR signals, as well as software flow control via XON/XOFF. The IC includes an internal oscillator that eliminates the need for external crystals or resonators. It is housed in a 48-lead TQFP package.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual independent UART channels with 16-byte FIFOs for each transmitter and receiver
• Internal oscillator removes requirement for external clock components
• Full hardware flow control support for RTS, CTS, DTR, and DSR signals
• Software flow control capability using XON/XOFF character sequences

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial communication systems requiring multiple serial ports
• Embedded controllers needing high-speed serial data transfer
• Telecommunications equipment utilizing RS-232 or RS-422 interfaces

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer designation carefully, as Sipex assets were acquired by MaxLinear. Ensure the part number suffix matches the required package type and temperature range. Confirm RoHS compliance status if environmental regulations apply to your specific deployment. Cross-reference the datasheet revision to ensure compatibility with existing system designs.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when two independent serial ports are needed within a single footprint. The integrated FIFOs reduce CPU overhead compared to standard UARTs without buffers. Verify that the 48-TQFP package fits the available PCB space. Consider the 3 Mbps maximum baud rate against the actual data throughput requirements of the application.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This component belongs to the XR16V255x family of dual UARTs. It shares functional similarities with the XR16V2550 but offers enhanced FIFO depths. The part was originally produced by Sipex before corporate acquisitions transferred production rights. It serves as a direct replacement for legacy dual UART solutions in compact industrial designs.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

XR16V2551IMTR-F is a tape-and-reel variant of the same electrical specification. Check pinout compatibility when substituting with other dual UART ICs from different manufacturers.