XR16L2552IJTR

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The Sipex XR16L2552IJTR is a dual universal asynchronous receiver and transmitter (UART) featuring 16-byte transmit and receive FIFOs. It operates on a single supply voltage ranging from 2.25V to 5.5V with 5-volt tolerant inputs. The device includes two independent UART channels, each with programmable baud rate generators supporting rates up to 3.125Mbps. It supports automatic hardware flow control via RTS/CTS signals and software flow control using Xon/Xoff protocols. An internal loop-back capability facilitates onboard diagnostics, while block mode data transfers are enabled through DMA controls.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Dual UART channels with integrated 16-byte FIFOs for efficient data buffering
• Wide operating voltage range from 2.25V to 5.5V with 5V tolerant I/O
• Supports hardware and software flow control mechanisms
• Includes internal loop-back for diagnostic testing

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial communication systems requiring low-power serial interfaces
• Embedded controllers needing multiple asynchronous serial ports
• Battery-powered devices utilizing wide voltage operation
• Modem control interfaces in telecommunications equipment

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer designation as Sipex or Exar, noting corporate history. Confirm the package type is 44-PLCC and check for RoHS compliance status. Ensure the suffix indicates tape and reel packaging if required for automated assembly. Validate that the component meets the specified electrical characteristics for your target application environment.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when dual UART functionality with FIFOs is required in a compact PLCC package. Consider it for designs needing 5V tolerance alongside lower voltage logic levels. Verify compatibility with existing pinouts if replacing legacy ST16C2552 or National Semiconductor PC16552 parts. Ensure the baud rate requirements do not exceed 3.125Mbps per channel.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the XR16L2552 series of dual UARTs. It is functionally compatible with the ST16C2552 and Pin-to-pin compatible with the XR16L2752 and XR16C2852 in the 44-PLCC package. The device represents an evolution in low-voltage serial communication controllers, offering enhanced features over earlier generations while maintaining backward compatibility.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Public confirmed substitute part numbers include ST16C2552 and PC16552 due to functional compatibility. The XR16L2752 and XR16C2852 are also listed as pin-to-pin compatible alternatives in the 44-PLCC package. Verify specific electrical parameters and package dimensions before substitution.