Overview
The ISOW1432DFMR, produced by Texas Instruments, is a low-emissions, 5-kVrms isolated RS-485 transceiver with an integrated DC/DC converter. This device is designed to meet or exceed the requirements of the TIA/EIA-485A standard and is suitable for high-speed data transmission applications. It features a maximum data rate of 12 Mbps, making it ideal for long-distance communications. The integrated DC/DC converter ensures low emissions and noise, meeting CISPR 32 Class B and EN 55032 Class B standards with margin on a two-layer PCB.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Data Rate | Maximum data transmission rate | 12 Mbps |
| Isolation Voltage | Maximum isolation voltage | 5 kVrms |
| Logic Supply Voltage (VIO) | Range of logic supply voltage | 1.71 V to 5.5 V |
| Power Converter Supply Voltage (VDD) | Range of power converter supply voltage | 3 V to 5.5 V |
| Operating Temperature | Range of ambient operating temperature | –40°C to +125°C |
| Package | Type and footprint of the package | 20-pin DFM (SOIC-20 footprint compatible) |
| Isolated Output Supply Voltage | Typical isolated output supply voltage | 3.3 V ± 5% |
| Additional Output Current | Additional current available for other circuits | 20 mA |
Key Features
- Meets or exceeds TIA/EIA-485A standard requirements.
- Integrated low-emissions DC/DC converter with high efficiency (typical efficiency: 46%).
- Low noise performance with a low frequency power converter at 25 MHz.
- Additional 2 Mbps GPIO channel for diagnostics, LED indication, or supply monitoring.
- Independent power supply for RS-485 and DC/DC converter.
- RS-485 with PROFIBUS compatibility, including open, short, and idle bus failsafe.
- Glitch-free power up and power down.
- Reinforced and basic isolation options available.
- No external components required other than bypass capacitors.
Applications
The ISOW1432DFMR is ideal for various applications requiring high-speed, isolated RS-485 communication, including:
- Industrial automation and control systems.
- Long-distance communication networks.
- PROFIBUS and other fieldbus systems.
- Medical devices requiring galvanic isolation.
- Aerospace and defense systems where high reliability and isolation are critical.
Q & A
- What is the maximum data rate of the ISOW1432DFMR?
The maximum data rate of the ISOW1432DFMR is 12 Mbps.
- What is the isolation voltage rating of the ISOW1432DFMR?
The isolation voltage rating is 5 kVrms.
- What is the range of the logic supply voltage (VIO) for the ISOW1432DFMR?
The logic supply voltage (VIO) ranges from 1.71 V to 5.5 V.
- Can the ISOW1432DFMR operate from a single supply voltage?
- What is the typical efficiency of the integrated DC/DC converter?
The typical efficiency of the integrated DC/DC converter is 46%.
- Does the ISOW1432DFMR require any external components for operation?
No, it does not require any external components other than bypass capacitors.
- What is the operating temperature range of the ISOW1432DFMR?
The operating temperature range is from –40°C to +125°C.
- What package type is the ISOW1432DFMR available in?
The ISOW1432DFMR is available in a 20-pin DFM (SOIC-20 footprint compatible) package.
- Is the ISOW1432DFMR compatible with PROFIBUS?
- What safety standards does the ISOW1432DFMR meet?
The ISOW1432DFMR meets safety standards such as UL1577, VDE, TUV, CSA, and CQC for reinforced and basic isolation.
