XR16C854IQ

UARTs (Universal Asynchronous Receiver Transmitter) Overview

The XR16C854IQ is a quad universal asynchronous receiver/transmitter (UART) integrated circuit manufactured by Sipex. It integrates four independent UART channels, each equipped with a 16-byte FIFO buffer to enhance data throughput and reduce CPU overhead. The device supports standard asynchronous serial communication protocols and operates within a specified voltage range suitable for various logic families. It is housed in an industrial temperature rated package designed for reliable performance in demanding environments.

UARTs (Universal Asynchronous Receiver Transmitter) Feature Summary

• Integrates four independent UART channels with dedicated 16-byte FIFOs for each transmitter and receiver path
• Supports standard asynchronous serial communication protocols including RS-232 and RS-485 compatible signaling
• Designed for industrial temperature operation ranges ensuring reliability in harsh environmental conditions

UARTs (Universal Asynchronous Receiver Transmitter) Applications

• Industrial automation systems requiring multiple serial communication links
• Embedded control units needing high-throughput data acquisition via serial interfaces
• Telecommunications equipment utilizing multi-channel asynchronous data transmission

UARTs (Universal Asynchronous Receiver Transmitter) Procurement Notes

Verify the manufacturer designation as Sipex or its successor entities, noting that component lineages may have shifted due to industry acquisitions. Confirm the specific suffix 'IQ' corresponds to the intended industrial temperature grade and packaging variant required for your design. Cross-reference the datasheet revision history to ensure compatibility with current supply chain sources and lead times.

UARTs (Universal Asynchronous Receiver Transmitter) Selection Notes

Select this component when a single IC solution is needed to replace multiple discrete UART controllers, thereby reducing board space and bill of materials complexity. Ensure the system power supply aligns with the device's operating voltage specifications. Verify that the target application requires the specific 16-byte FIFO depth and baud rate capabilities provided by this quad-channel architecture.

UARTs (Universal Asynchronous Receiver Transmitter) Part Context

This part belongs to the XR16C85x family of quad UARTs, which are widely used in legacy and modern embedded systems. Sipex was a prominent manufacturer of interface ICs before being acquired by Exar Corporation, which later became part of Renesas Electronics. Understanding this corporate history is essential for sourcing genuine components and accessing updated documentation from current manufacturers.

UARTs (Universal Asynchronous Receiver Transmitter) Replacement Considerations

Check for direct pin-to-pin replacements from Exar or Renesas product lines, such as the XR16C850 series variants. Verify electrical parameter equivalence, particularly regarding FIFO size and operating voltage, before substituting. Ensure any alternative component maintains the same industrial temperature rating and package dimensions for mechanical compatibility.