XR16M2651IM48

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The XR16M2651IM48 is a quad universal asynchronous receiver/transmitter (UART) integrated circuit manufactured by MaxLinear, formerly Sipex. It integrates four independent UART channels within a single package, supporting data rates up to 3 Mbps. The device operates on a single 3.3V power supply and features 5V-tolerant inputs for compatibility with legacy systems. It includes built-in RS-485 and RS-232 transceivers, eliminating the need for external interface components. The IC utilizes an advanced FIFO architecture to enhance throughput and reduce CPU overhead during high-speed serial communications.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Integrates four independent UART channels with full hardware flow control support
• Includes onboard RS-485 and RS-232 transceivers for direct bus connectivity
• Supports baud rates up to 3 Mbps with low jitter clock generation
• Features 5V-tolerant I/O pins for seamless interfacing with 5V logic systems

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial automation controllers requiring multiple serial communication ports
• Telecommunications equipment utilizing RS-485 multi-drop networks
• Point-of-sale (POS) terminals integrating peripheral devices via RS-232
• Embedded systems needing compact solutions for mixed-voltage serial interfaces

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer designation carefully, as the component was originally produced under the Sipex brand before acquisition by MaxLinear. Confirm that the specific suffix matches the required package type and temperature range. Check current availability status, as older revisions may be discontinued or subject to limited supply constraints from original distributors.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a design requires four distinct serial ports in a space-constrained environment. Ensure the system voltage aligns with the 3.3V core requirement while leveraging the 5V-tolerant inputs. Consider the integrated transceiver capabilities to simplify bill of materials compared to discrete UART and line driver combinations.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the XR16M265x series of quad UARTs. It serves as a successor to earlier Sipex quad UART offerings. The IM48 suffix indicates a 48-lead TQFP package. It is designed for applications replacing multiple discrete UART and transceiver chips to save board space and reduce assembly complexity.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Direct pin-to-pin replacements may include other quad UARTs from manufacturers like NXP or Texas Instruments, but electrical characteristics such as drive strength and voltage tolerance must be verified. Cross-reference with MaxLinear's current portfolio for updated equivalents if the original Sipex branding is no longer supported.