XR16L651IM

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The XR16L651IM is a dual universal asynchronous receiver and transmitter (DUART) manufactured by Sipex. It integrates two independent UART channels with 14-byte transmit and receive FIFOs on a single chip, supporting data rates up to 3 Mbps at 3.3V. The device operates from a single supply voltage ranging from 2.7V to 5.5V and features full hardware flow control via RTS/CTS and DTR/DSR signals. It includes an integrated 16-bit programmable baud rate generator and supports standard protocols including RS-232, RS-422, and RS-485. The component is housed in a 28-pin SOIC package.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual independent UART channels with integrated 14-byte FIFOs for enhanced throughput
• Hardware flow control support using RTS, CTS, DTR, and DSR signals
• Wide operating voltage range compatible with both 3.3V and 5V systems
• Integrated 16-bit baud rate generators for precise clock division

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial communication systems requiring isolated serial links
• Point-of-sale terminals and barcode scanners
• Medical equipment with serial data acquisition needs
• Embedded controllers managing multiple peripheral interfaces

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer designation as Sipex or its successor entity, noting that corporate acquisitions may affect part numbering continuity. Confirm the specific suffix 'IM' corresponds to the 28-pin SOIC package variant. Ensure compliance with current RoHS directives if required for the target assembly process. Cross-reference with official distributor catalogs to confirm active status or obsolescence before finalizing procurement plans.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when dual serial ports are required within a single footprint constraint. The integrated FIFOs reduce CPU overhead compared to standard UARTs without buffers. Verify that the 3 Mbps maximum baud rate meets the system's timing requirements. Consider the 2.7V minimum operating voltage if designing for low-power battery applications where 3.3V rails are present.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This device belongs to the XR16L65x family of DUARTs, which provides compact solutions for multi-port serial communication. The series is designed to replace discrete UART and buffer combinations, reducing board space and power consumption. It serves as a bridge between microprocessors and serial peripherals in embedded environments.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Check for direct pin-compatible alternatives from the same manufacturer family, such as other variants within the XR16L65x series. Verify electrical compatibility regarding voltage levels and drive strength when substituting with components from different vendors. Ensure that the replacement maintains the same package outline dimensions for mechanical fit.