ISO35DWR

Overview

The ISO35DWR 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 three channels, providing bidirectional data communication across the isolation barrier. The device supports data rates up to 1 Mbps and offers a common-mode transient immunity of 25 kV/µs. It operates within a supply voltage range of 3.15 V to 3.6 V and functions at temperatures from -40°C to +85°C. Packaged in a 16-pin SOIC (0.295 inch width), it provides 2500 Vrms isolation.

Feature Summary

• Integrates RS-485 transceiver functionality with a three-channel capacitive digital isolator for galvanic separation.
• Provides high common-mode transient immunity to ensure reliable signal transmission in electrically noisy environments.
• Supports both full-duplex and half-duplex communication modes for flexible network topology implementation.

Applications

• Industrial automation systems requiring robust serial communication
• Building automation and control networks
• Process control instrumentation interfaces

Procurement Notes

Verify the specific suffix 'DWR' confirms the tape-and-reel packaging format and SOIC-16 body style. Confirm the component meets RoHS compliance standards as indicated in official manufacturer documentation. Ensure the order quantity aligns with standard reel specifications if bulk procurement is required. Cross-reference the manufacturer part number against current datasheets to validate active status and pinout configuration before finalizing purchase orders.

Selection Notes

Select this component when designing systems that require integrated isolation and RS-485 transceivers in a single package. It is suitable for applications needing moderate data rates up to 1 Mbps with high noise immunity. Consider the 16-pin SOIC footprint for PCB layout constraints. Evaluate the 3.3-V supply requirement against system power rails. This part simplifies design by combining isolation and interface functions, reducing component count compared to discrete solutions.

Part Context

The ISO35DWR belongs to the ISO35 family of isolated transceivers from Texas Instruments. This series combines industry-standard RS-485/RS-422 transceiver performance with advanced capacitive isolation technology. The family is designed to replace bulky magnetic isolators, offering smaller form factors and improved reliability. These devices are widely used in industrial environments where electrical safety and noise rejection are critical for data integrity.

FAQ

What is the maximum data rate supported by the ISO35DWR?

The ISO35DWR supports a maximum data rate of 1 Mbps.

Does the ISO35DWR support both full-duplex and half-duplex modes?

Yes, the device is designed to operate in both full-duplex and half-duplex communication modes.

What is the common-mode transient immunity (CMTI) specification?

The ISO35DWR features a common-mode transient immunity of 25 kV/µs.