Overview
The ISO35DWG4, produced by Texas Instruments, is an isolated full-duplex differential line driver and receiver designed for TIA/EIA 485/422 applications. This component is part of the ISOx5 family, which includes both half-duplex and full-duplex configurations. The ISO35DWG4 is notable for its high-speed signaling capabilities and robust isolation features, making it suitable for a variety of industrial and commercial applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Signaling Rate | Up to 1 Mbps | |
| Operating Junction Temperature | -40 to 150 | °C |
| Isolation Voltage | 2500 VRMS | |
| Transient Immunity | 50 kV/μs (typical) | |
| Bus Load | 1/8 unit load | |
| Number of Nodes on Bus | Up to 256 | |
| Package Type | 16-Pin SOIC | |
| Junction-to-Ambient Thermal Resistance | 79.6 | °C/W |
Key Features
- Meets or exceeds TIA/EIA RS-485 requirements
- 1/8 unit load – supports up to 256 nodes on a bus
- Signaling rates up to 1 Mbps
- Thermal shutdown protection
- Low bus capacitance – 16 pF (typical)
- 50 kV/μs typical transient immunity
- Fail-safe receiver for bus open, short, idle conditions
- 3.3-V inputs are 5-V tolerant
- Safety and regulatory approvals: 4000-VPK VIOTM, 560-VPK VIORM per DIN EN IEC 60747-17 (VDE 0884-17), 2500 VRMS isolation rating per UL 1577 and CSA 62368-1
Applications
- Security systems
- Chemical production
- Factory automation
- Motor and motion control
- HVAC and building automation networks
- Networked security stations
Q & A
- What is the signaling rate of the ISO35DWG4?
The signaling rate of the ISO35DWG4 is up to 1 Mbps. - What is the operating junction temperature range for the ISO35DWG4?
The operating junction temperature range is -40°C to 150°C. - What is the isolation voltage rating of the ISO35DWG4?
The isolation voltage rating is 2500 VRMS. - How many nodes can be supported on a bus using the ISO35DWG4?
Up to 256 nodes can be supported on a bus. - What is the typical transient immunity of the ISO35DWG4?
The typical transient immunity is 50 kV/μs. - What type of package does the ISO35DWG4 come in?
The ISO35DWG4 comes in a 16-Pin SOIC package. - Is the ISO35DWG4 compliant with TIA/EIA RS-485 requirements?
Yes, the ISO35DWG4 meets or exceeds TIA/EIA RS-485 requirements. - What are the safety and regulatory approvals for the ISO35DWG4?
The ISO35DWG4 has approvals for 4000-VPK VIOTM, 560-VPK VIORM per DIN EN IEC 60747-17 (VDE 0884-17), and 2500 VRMS isolation rating per UL 1577 and CSA 62368-1. - Are the inputs of the ISO35DWG4 5-V tolerant?
Yes, the 3.3-V inputs are 5-V tolerant. - What are some common applications for the ISO35DWG4?
Common applications include security systems, chemical production, factory automation, motor and motion control, HVAC and building automation networks, and networked security stations.
