ISO35MDW

Overview

The ISO35MDW is an isolated 3.3-V full and half-duplex RS-485 transceiver manufactured by Texas Instruments. It integrates a capacitive coupling digital isolator with the transceiver in a single SOIC-16 package. The device supports signaling rates up to 1 Mbps and meets TIA/EIA RS-485 requirements, allowing up to 256 nodes on a bus due to its 1/8 unit load characteristic. Key electrical specifications include a 2500 Vrms isolation voltage, a common mode transient immunity of 25 kV/µs, and operation within a temperature range of -40°C to +85°C.

Feature Summary

• Integrates isolated RS-485 transceiver with capacitive coupling digital isolator
• Supports full and half-duplex communication modes
• Provides thermal shutdown protection for system reliability

Applications

• Industrial automation control systems
• Building automation networks
• Process control instrumentation

Procurement Notes

Verify the specific suffix 'DW' corresponds to the tube packaging format rather than reel or cut tape options when sourcing. Confirm that the component meets RoHS compliance standards required for your assembly process. Ensure the supply chain source provides valid traceability documentation for this Texas Instruments part number to guarantee authenticity and quality assurance during procurement.

Selection Notes

Select this component when designing systems requiring galvanic isolation between RS-485 buses and low-voltage logic domains. It is suitable for applications needing high common-mode transient immunity to prevent signal errors in electrically noisy environments. Consider the 1/8 unit load specification if connecting multiple devices to a single bus segment to ensure proper network loading and signal integrity across the transmission line.

Part Context

This device belongs to the ISOx5 family of isolated transceivers from Texas Instruments. It combines the functionality of an RS-485 transceiver with a digital isolator to simplify board layout and reduce component count. The series is designed for robust industrial communication where electrical isolation is critical for protecting sensitive electronics from high-voltage transients and ground potential differences.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation.