XR16L2552IJ-F

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The XR16L2552IJ-F is a dual universal asynchronous receiver and transmitter (DUART) manufactured by MaxLinear, Inc. It operates within a supply voltage range of 2.25V to 5.5V and features 5-volt tolerant inputs. The device integrates two independent UART channels, each equipped with 16-byte transmit and receive FIFOs. It supports data rates up to 4Mbps and includes automatic hardware flow control (RTS/CTS), software flow control (Xon/Xoff), and a complete modem control interface. The component utilizes an internal oscillator and timer/counters, housed in a 44-PLCC package.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual independent UART channels with integrated 16-byte TX and RX FIFOs for efficient block mode data transfers
• Supports automatic hardware flow control via RTS/CTS signals and software flow control via Xon/Xoff protocols
• Includes a complete modem control interface with onboard status registers for error indications and operational monitoring
• Features an internal loop-back capability designed for onboard diagnostics and testing

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial communication systems requiring reliable serial data transmission
• Embedded systems utilizing low-voltage microcontrollers with 5V-tolerant interfaces
• Equipment needing multiple serial ports with hardware flow control capabilities

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer designation on official datasheets, as MaxLinear acquired Exar Corporation's assets. Confirm that the specific suffix indicates the correct package type and temperature range. Ensure compatibility with existing board layouts, particularly regarding pin assignments relative to legacy components like the ST16C2552 or PC16552. Check for any product change notices affecting electrical characteristics or packaging materials.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a design requires two independent serial ports with FIFO buffering in a compact PLCC package. It is suitable for applications needing 5V tolerance on input pins while operating from lower core voltages. Consider this part if hardware flow control is mandatory for data integrity. Verify that the required baud rate generator resolution meets the system timing specifications.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This device belongs to the XR16L255x series of DUARTs. It serves as an improved version of the ST16C2552, offering lower operating voltages while maintaining functional compatibility. The part is pin-to-pin compatible with certain National Semiconductor and Exar legacy devices in the 44-PLCC package, facilitating direct replacements in existing designs.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

The XR16L2552 is functionally compatible with the ST16C2552 and XR16L2752 in the 44-PLCC package. Designers replacing these parts should verify pinout alignment and ensure that the 5V tolerance specifications match the target system requirements.