XR16V2650IM

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The XR16V2650IM is a high-performance dual universal asynchronous receiver/transmitter (DUART) manufactured by Exar Corporation, now part of MaxLinear. This component integrates two independent UART channels, each equipped with a 32-byte FIFO buffer to enhance data throughput and reduce CPU overhead. It supports standard RS-232 communication protocols and operates within a wide supply voltage range, typically from 4.5 V to 5.5 V for the standard V-series devices. The device features programmable baud rates, interrupt-driven operation, and comprehensive control registers for flow management. Designed for robust serial communication in industrial and commercial environments, it offers reliable data transmission with low power consumption characteristics suitable for embedded systems requiring multiple serial interfaces.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual independent UART channels with integrated 32-byte FIFOs per channel
• Supports standard RS-232 protocol with programmable baud rate generators
• Interrupt-driven operation for efficient CPU utilization
• Hardware flow control support for reliable data transmission

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial automation controllers requiring multiple serial ports
• Embedded systems with limited CPU resources needing FIFO buffering
• Communication gateways and modems
• Point-of-sale terminals and kiosks

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer source carefully, as Exar Corporation was acquired by MaxLinear. Ensure the specific suffix 'IM' corresponds to the correct package type and temperature grade required for your design. Confirm pinout compatibility if replacing legacy components from other manufacturers. Check for updated documentation from the current rights holder to ensure accurate electrical specifications and reliability data are referenced during integration.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when dual independent serial interfaces are needed with moderate FIFO depth. Compare against the XR16V2651 if PowerSave mode is required, or the XR16V2750 if higher 64-byte FIFO capacity is necessary for high-throughput applications. Consider the XR16M2650 if lower voltage operation (3.3V) is preferred over the standard 5V logic levels. Evaluate package availability and lead times based on current supply chain conditions for MaxLinear products.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

The XR16V2650IM belongs to Exar's high-performance DUART family, designed to replace older single-channel UARTs or multi-chip solutions. It consolidates two full UART functions into a single IC, reducing board space and complexity. The 'V' indicates standard voltage operation, while 'IM' typically denotes an industrial temperature range and surface-mount packaging. This series is widely used in legacy and modern embedded designs requiring robust serial connectivity.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Direct pin-compatible alternatives include the XR16V2651 (adds PowerSave) and XR16V2652 (similar functionality). For lower voltage applications, consider the XR16M2650. Verify that any substitute maintains the same 32-byte FIFO structure and interrupt logic to ensure software compatibility without major redesign.