ISO35DW

Overview

The ISO35DW is an isolated 3.3-V full and half-duplex RS-485 transceiver manufactured by Texas Instruments. It features a single channel with unidirectional polarity, operating at a data rate of 1 Mb/s. The device provides 2500 Vrms insulation voltage using capacitive coupling technology. It functions within a supply voltage range of 3.15 V to 3.6 V, drawing 8 mA of operating current. Propagation delay is specified at 340 ns. The component operates between -40°C and +85°C and is housed in a 16-SOIC package.

Feature Summary

• Integrates isolated RS-485 transceiver functionality with capacitive coupling for galvanic isolation
• Supports both full-duplex and half-duplex communication modes on a single channel
• Provides high common-mode transient immunity for reliable signal transmission in noisy environments

Applications

• Industrial automation systems requiring robust serial communication
• Building automation networks utilizing RS-485 protocols
• Process control applications needing isolated data links

Procurement Notes

Verify the specific suffix against official documentation to confirm pinout and electrical characteristics. Ensure the procurement source provides valid manufacturer traceability. Confirm that the component meets RoHS compliance requirements as stated in the datasheet. Check humidity sensitivity handling instructions prior to assembly. Validate that the ordering information matches the exact part number variant required for the design.

Selection Notes

Select this component when a single-channel isolated RS-485 interface is required. Consider the 1 Mb/s data rate limit for application compatibility. Evaluate the 2500 Vrms isolation rating against system safety standards. Assess the 3.3 V supply requirement against available power rails. Review the SOIC-16 package dimensions for PCB layout constraints.

Part Context

The ISO35DW belongs to the ISO35 series of isolated transceivers from Texas Instruments. This series integrates digital isolation technology with RS-485 transceiver capabilities. The device replaces traditional discrete isolation components with a single integrated solution. It supports standard RS-485 communication protocols in industrial environments.

Replacement Considerations

ISO35DWR