ISO35DWRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The ISO35DWRG4 is a 3.3 V full- and half-duplex RS-485/RS-422 transceiver with integrated digital isolation, supporting data rates up to 20 Mbps and ±15 kV ESD protection in a 16-pin SOIC package. It provides 2500 V RMS galvanic isolation between the logic and bus sides.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- ISO35DWRG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of ISO35DWRG4?
- Integrated digital isolation with 2500 V RMS barrier eliminates separate isolator ICs
- Supports full-duplex and half-duplex RS-485/RS-422 operation at up to 20 Mbps
- ±15 kV ESD protection on bus pins for robust field-installation in industrial environments
- 3.3 V logic supply with differential Schmitt-trigger inputs for high noise immunity
What is ISO35DWRG4 used for?
The ISO35DWRG4 is designed for isolated RS-485 and RS-422 communication links in industrial field-bus networks, smart meters, and motor-drive control panels where ground potential differences and high-voltage transients threaten MCU and signal-chain integrity. Its integrated isolation barrier simplifies board design for PROFIBUS DP nodes, multi-drop MODBUS RTU networks, and building automation gateways requiring galvanic separation between the controller and field wiring.
What are the specifications of ISO35DWRG4?
| YTEOL | 0 |
| Differential Output | YES |
| Driver Number of Bits | 1 |
| High Level Input Current-Max | 0.00001A |
| Input Characteristics | DIFFERENTIAL SCHMITT TRIGGER |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | EIA-422; TIA-422; EIA-485; TIA-485 |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Out Swing-Min | 1.5V |
| Output Characteristics | DIFFERENTIAL |
| Output Polarity | COMPLEMENTARY |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Receive Delay-Max | 100ns |
| Receiver Number of Bits | 1 |
| Supply Current-Max | 19mA |
| Supply Voltage-Max | 3.6V |
| Supply Voltage-Min | 3.15V |
| Supply Voltage-Nom | 3.3V |
| Supply Voltage1-Max | 3.6V |
| Supply Voltage1-Min | 3.15V |
| Supply Voltage1-Nom | 3.3V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Transmit Delay-Max | 340ns |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Where can I find the ISO35DWRG4 datasheet?
ISO35DWRG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for ISO35DWRG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What isolation voltage and ESD rating does ISO35DWRG4 provide on the RS-485 bus?
The ISO35DWRG4 provides 2500 V RMS galvanic isolation between the logic-side and bus-side domains, protecting the MCU from ground loops and high-voltage transients. Bus pins are also protected against ESD events up to ±15 kV, meeting the IEC 61000-4-2 contact discharge level for industrial field installations.
What maximum data rate does ISO35DWRG4 support and over what cable length?
The ISO35DWRG4 supports RS-485 data rates up to 20 Mbps over short cable runs (under 10 m), and can transmit at 100 kbps over cable lengths up to 1200 m, giving designers flexibility for both high-speed and long-distance multi-drop RS-485 networks in industrial automation and building control.
How does integrating isolation into ISO35DWRG4 compare to using a discrete isolator plus a standard RS-485 transceiver?
A discrete approach requires separate isolation IC, bypass capacitors, and two supply rails, consuming around 400 mm² of PCB area, while ISO35DWRG4 integrates both functions in a single 16-pin SOIC occupying under 100 mm². This reduces component count by at least 8 parts and simplifies the board layout for isolated RS-485 ports in compact industrial modules.
Is ISO35DWRG4 compatible with both full-duplex and half-duplex RS-485 network topologies?
Yes, the ISO35DWRG4 supports both full-duplex operation using 4 wires (separate transmit and receive pairs per EIA-422) and half-duplex operation using 2 wires with direction control via the DE and RE enable pins, allowing the same device to be used in MODBUS RTU half-duplex networks as well as PROFIBUS DP full-duplex 12 Mbps links.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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