Overview
The ISO3088DWR is an isolated half-duplex differential line transceiver designed for TIA/EIA RS-485 and RS-422 applications. Produced by Texas Instruments, this device is part of the ISO308x family, which includes full-duplex and half-duplex transceivers. The ISO3088DWR is ideal for use in long transmission lines due to its ability to break ground loops, allowing for a larger common-mode voltage range. It features a symmetrical isolation barrier that provides 2500 V RMS of isolation between the bus-line transceiver and the logic-level interface, enhancing protection against electrical noise transients and reducing the risk of damage to sensitive circuitry. The device operates over a temperature range of –40°C to +85°C, making it suitable for various industrial and commercial environments.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Signaling Rate | Up to 20 Mbps | |
| Unit Load | 1/8 | |
| Number of Nodes on Bus | Up to 256 | |
| Bus Capacitance | 16 pF (typical) | |
| Transient Immunity | 50 kV/μs (typical) | |
| Operating Temperature Range | –40°C to +85°C | |
| Package Type | SOIC (DW) 16 pins | |
| Isolation Voltage | 2500 V RMS (UL 1577), 4000 V PK (CSA 62368-1) | |
| ESD Protection | 12 kV HBM between bus pins and GND2, 6 kV HBM between bus pins and GND1 |
Key Features
- Meets or exceeds TIA/EIA RS-485 requirements
- Signaling rates up to 20 Mbps
- 1/8 unit load – up to 256 nodes on a bus
- Thermal shutdown protection
- Low bus capacitance – 16 pF (typical)
- 50 kV/μs typical transient immunity
- Fail-safe receiver for bus open, short, idle
- 3.3-V inputs are 5-V tolerant
- Bus-pin ESD protection
- Safety-related certifications: 4000-V PK basic insulation, 560 V PK V IORM per DIN EN IEC 60747-17, 2500 V RMS isolation per UL 1577, 4000 V PK isolation per 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 ISO3088DWR used for? The ISO3088DWR is used as an isolated half-duplex differential line transceiver for TIA/EIA RS-485 and RS-422 applications.
- What is the maximum signaling rate of the ISO3088DWR? The maximum signaling rate is up to 20 Mbps.
- How many nodes can be supported on a bus using the ISO3088DWR? Up to 256 nodes can be supported on a bus.
- What is the typical bus capacitance of the ISO3088DWR? The typical bus capacitance is 16 pF.
- What kind of ESD protection does the ISO3088DWR offer? The ISO3088DWR offers 12 kV HBM between bus pins and GND2, and 6 kV HBM between bus pins and GND1.
- What are the safety-related certifications for the ISO3088DWR? The device has certifications for 4000-V PK basic insulation, 560 V PK V IORM per DIN EN IEC 60747-17, 2500 V RMS isolation per UL 1577, and 4000 V PK isolation per CSA 62368-1.
- What is the operating temperature range of the ISO3088DWR? The operating temperature range is –40°C to +85°C.
- What type of package does the ISO3088DWR come in? The ISO3088DWR comes in a SOIC (DW) package with 16 pins.
- Does the ISO3088DWR have thermal shutdown protection? Yes, the ISO3088DWR has thermal shutdown protection.
- Is the ISO3088DWR suitable for use in industrial environments? Yes, it is suitable for use in various industrial and commercial environments due to its robust specifications and certifications.
