ISO35TDWR

Overview

The ISO35TDWR is a digital isolator featuring an integrated transformer driver for isolated RS-485 and RS-422 communication. It provides full-duplex operation with three independent channels, supporting data rates up to 1 Mbps. The device utilizes capacitive coupling technology to achieve an isolation voltage of 2500 Vrms and offers a common-mode transient immunity of 25 kV/µs. Operating on a single 3.15 V to 3.6 V supply, it draws 8 mA of quiescent current. The component is housed in a 16-pin SOIC package and functions within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates an isolated transceiver with a built-in transformer driver for simplified system design
• Provides robust signal isolation via capacitive coupling technology
• Supports full-duplex communication protocols including RS-485 and RS-422

Applications

• Industrial automation control systems requiring galvanic isolation
• Isolated serial communication interfaces in noisy environments
• Medical equipment needing high-voltage isolation barriers

Procurement Notes

Verify the specific suffix 'T' indicates tape-and-reel packaging configuration when ordering. Confirm that the integrated transformer driver requirement aligns with the target application's isolation topology. Ensure the 3.3 V power supply rails match the specified operating voltage range of 3.15 V to 3.6 V. Check for moisture sensitivity level requirements during storage and handling procedures.

Selection Notes

Select this component when a combined digital isolator and isolated transceiver solution is required to reduce board space. It is suitable for applications demanding high common-mode transient immunity. Consider the 16-pin SOIC footprint constraints. Verify compatibility with the host controller logic levels and the need for full-duplex data transmission capabilities.

Part Context

This part belongs to the ISO35 family of Texas Instruments digital isolators. It differs from standard isolators by integrating the transceiver function, eliminating the need for external magnetic components. The 'DWR' suffix denotes the SOIC-16 package and reel packaging format. It serves as a compact alternative to discrete isolator and transceiver combinations.

Replacement Considerations

ISO35DW: Non-isolated transceiver variant without integrated transformer driver. ISO35DWR: Standard digital isolator without integrated transceiver functionality.