ISO15DWG4

Overview

The ISO15DWG4 is a digital isolator integrated with an isolated RS-485 transceiver, manufactured by Texas Instruments. It operates within a supply voltage range of 3.15 V to 3.6 V and supports data rates up to 1 Mb/s. The device features capacitive coupling isolation with a rated insulation voltage of 2500 Vrms. It is housed in a 16-pin SOIC package (DW) and supports both full-duplex and half-duplex communication modes. The component functions unidirectionally with one channel and exhibits a propagation delay of 340 ns. It is designed for operation across a temperature range of -55 °C to +125 °C.

Feature Summary

• Integrates an isolated RS-485 transceiver with digital isolation capabilities
• Supports both full-duplex and half-duplex communication protocols
• Utilizes capacitive coupling technology for signal transmission
• Operates within a wide industrial temperature range

Applications

• Industrial automation systems requiring galvanic isolation
• RS-485 communication networks in harsh environments
• Process control instrumentation
• Building automation interfaces

Procurement Notes

Verify the obsolete status of the ISO15DWG4 before procurement planning. Confirm availability of recommended substitutes such as the ISO15DWR. Ensure that design-in activities account for end-of-life transitions and validate that alternative components meet all electrical and mechanical specifications required for the application.

Selection Notes

Select this component when an integrated solution combining RS-485 transceiver functionality with high-voltage isolation is required. Consider the specific 3.3V operating voltage constraint and the 1 Mb/s data rate limit. Evaluate the SOIC-16 package dimensions against board space requirements. Verify compatibility with the intended communication protocol and environmental temperature conditions.

Part Context

The ISO15DWG4 belongs to the ISO15 series of isolated transceivers from Texas Instruments. This series combines standard interface logic with robust digital isolation to protect sensitive electronics from high voltages. The part is distinct from general-purpose digital isolators by its integrated transceiver circuitry tailored for RS-485 applications.

Replacement Considerations

The ISO15DWR is listed as a manufacturer-recommended substitute. Verify pinout compatibility and electrical parameter equivalence before substitution.