DS3897MX

Overview

The DS3897MX is a high-performance, low-power quad universal asynchronous receiver/transmitter (QUAD UART) manufactured by National Semiconductor. This integrated circuit provides four independent serial communication channels within a single package, designed to facilitate data exchange between microprocessors and peripheral devices. It supports standard RS-232 and RS-422/RS-485 protocols, offering flexible interface options for various embedded systems. The device integrates on-chip clock generators and control logic to minimize external component requirements, ensuring reliable synchronous and asynchronous operation across a wide range of industrial and commercial applications.

Feature Summary

• Integrates four independent UART channels for multi-port serial communication
• Supports both synchronous and asynchronous transmission modes
• Includes on-chip baud rate generators for precise timing control
• Features comprehensive error detection capabilities including parity and overrun flags

Applications

• Industrial automation controllers requiring multiple serial links
• Embedded systems with mixed protocol communication needs
• Telecommunications equipment interfacing
• Point-of-sale terminals and kiosks

Procurement Notes

Verify the specific suffix codes against the official datasheet to confirm voltage levels and temperature ranges. Ensure compatibility with existing board layouts regarding pin configurations and power supply requirements. Cross-reference part numbers with current manufacturer recommendations as product lines may evolve.

Selection Notes

Select this component when multiple serial interfaces are required in a space-constrained design. Evaluate the power consumption specifications against system battery life requirements. Confirm that the operating voltage range matches the target microprocessor logic levels to avoid level shifting issues.

Part Context

National Semiconductor was acquired by Texas Instruments in 2011. Consequently, the DS3897MX is now managed under the TI portfolio. Designers should refer to updated documentation hosted by Texas Instruments for the most current reliability data and lifecycle status information.

Replacement Considerations

Consult Texas Instruments documentation for direct cross-references or newer generations of QUAD UARTs. Verify pin-to-pin compatibility before substituting with alternative vendors' components to ensure functional equivalence.