DS481M

Overview

The DS481M is a low-power RS-485 and RS-422 multipoint transceiver manufactured by Texas Instruments, formerly National Semiconductor. It integrates one driver and one receiver within an 8-SOIC package. The device supports data rates up to 2 Mb/s with a fixed operating supply voltage of 5 V. It features a sleep mode for power reduction, drawing 500 uA during operation. The component operates reliably across a temperature range from -40 C to +85 C. Output signals are differential, ensuring robust communication in multipoint network environments.

Feature Summary

• Integrates a single driver and receiver for RS-485 and RS-422 multipoint communication
• Includes a dedicated sleep mode to minimize power consumption
• Supports data transmission speeds up to 2 Mb/s
• Provides differential output for reliable signal integrity

Applications

• RS-485 multipoint communication networks
• RS-422 point-to-point or multipoint links
• Industrial control systems requiring low-power interfaces
• Embedded sensor bus architectures

Procurement Notes

Verify the current lifecycle status before procurement, as this component may be discontinued or subject to limited availability. Confirm that the 8-SOIC package dimensions match the target PCB footprint. Ensure the 5 V supply voltage aligns with the system design requirements. Check for RoHS compliance documentation if environmental regulations apply to the final product assembly.

Selection Notes

Select this component when a low-power solution for RS-485 or RS-422 interfaces is required. The integrated sleep mode makes it suitable for battery-operated or energy-constrained applications. Verify that the 2 Mb/s data rate meets the system's throughput needs. Consider the 8-SOIC package size for space-constrained designs. Ensure compatibility with the 5 V logic levels used in the host microcontroller or processor.

Part Context

The DS481M belongs to the DS481 series of interface ICs, originally developed by National Semiconductor and now managed by Texas Instruments. This series focuses on providing efficient communication solutions for industrial and commercial applications. The device represents a transition from legacy National Semiconductor products to TI's portfolio, maintaining pin compatibility and functional specifications for existing designs.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Due to the discontinued status indicated in some sources, verify equivalent components through official Texas Instruments channels or authorized distributors for direct replacements.