XR16M2551IL32

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The XR16M2551IL32 is a dual universal asynchronous receiver/transmitter (UART) interface integrated circuit manufactured by MaxLinear, formerly Sipex. It features two independent UART channels, each equipped with 16-byte transmit and receive FIFOs to enhance data throughput and reduce CPU overhead. The device supports operation from a single power supply ranging from 2.25 V to 5.5 V, compatible with 2.5 V, 3.3 V, and 5 V logic levels. It offers high data rates up to 4 Mb/s and includes full modem control signals. The component is housed in a 32-lead QFN package measuring 5 mm x 5 mm, designed for surface-mount applications requiring compact footprints.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual independent UART channels with dedicated 16-byte FIFOs for efficient data buffering
• Single-supply operation supporting 2.5 V, 3.3 V, and 5 V logic interfaces
• High-speed serial communication capability up to 4 Mb/s baud rate
• Compact 32-lead QFN package design optimized for space-constrained PCB layouts

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial automation systems requiring reliable serial communication
• Embedded control units with limited GPIO resources
• Telecommunications equipment utilizing RS-232 or RS-485 interfaces
• Point-of-sale terminals and payment devices

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer designation as MaxLinear, which acquired the Sipex product line. Confirm the specific suffix indicates the 32-lead QFN package variant. Check RoHS compliance status and moisture sensitivity level ratings prior to assembly planning. Ensure the source document matches the exact part number to avoid pinout mismatches with similar family members.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when dual UART functionality is required within a small form factor. Compare against single-channel alternatives if only one port is needed to optimize cost. Verify voltage level compatibility with the host system's I/O standards. Consider the 16-byte FIFO depth relative to expected data burst sizes to ensure adequate buffer capacity without excessive latency.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This device belongs to the XR16L2550/XR16M2550 series of low-power UARTs. It shares architectural similarities with the XR16L2551 but may differ in specific electrical characteristics or packaging options. The series is widely used in legacy and modern embedded designs transitioning from older 16C550-compatible components to more integrated solutions.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Direct substitutes include the XR16L2551ILTR-F and XR16L2550IL-F from MaxLinear. Verify pin-to-pin compatibility and FIFO size equivalence before substitution. Cross-reference datasheets for any differences in operating temperature ranges or signal timing specifications.