ISOW1412DFM Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments ISOW1412DFM is an isolated RS-485/RS-422 transceiver integrating a low-emissions, low-noise, high-efficiency DC-DC converter in a single 20-pin SOIC package. It provides 5 kV reinforced isolation with up to 500 kbps data rate and supports EIA-485 and EIA-422 standards for industrial communication networks.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- ISOW1412DFM Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 105.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Integrated reinforced isolation with 5 kV isolation rating eliminates external isolator components in RS-485/RS-422 designs
- Built-in low-emissions DC-DC converter with high efficiency reduces power supply complexity and EMI in isolated bus interfaces
- Supports EIA-485 and EIA-422 standards enabling half-duplex and full-duplex differential communication up to 500 kbps
- 20-pin SOIC (R-PDSO-G20) package integrates isolation and power in a compact footprint for space-constrained industrial PCBs
Applications
The ISOW1412DFM is designed for industrial automation, factory networks, and building control systems that require galvanically isolated RS-485 or RS-422 communication links. Its integrated DC-DC converter simplifies system design by eliminating the need for separate isolated power supplies on the bus interface side. This device is well-suited for PLC I/O modules, field instrument interfaces, and multi-drop sensor networks operating in electrically noisy environments.
Specifications
| Date Of Intro | 2020-09-06 |
| YTEOL | 0 |
| Differential Output | YES |
| Driver Number of Bits | 1 |
| Input Characteristics | STANDARD |
| Interface IC Type | LINE TRANSCEIVER |
| Interface Standard | EIA-422; EIA-485 |
| JESD-30 Code | R-PDSO-G20 |
| Number of Functions | 1 |
| Output Low Current-Max | 0.004A |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP20,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, HEAT SINK/SLUG |
| Receive Delay-Max | 0.61ns |
| Receiver Number of Bits | 1 |
| Supply Current-Max | 0.55mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 1.71V |
| Supply Voltage-Nom | 2.5V |
| Supply Voltage1-Max | 5.5V |
| Supply Voltage1-Min | 1.71V |
| Supply Voltage1-Nom | 2.5V |
| Surface Mount | YES |
| Technology | BICMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Transmit Delay-Max | 0.61ns |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.01 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for ISOW1412DFM:
Frequently Asked Questions
What isolation voltage and data rate does the ISOW1412DFM support for industrial RS-485 networks?
The ISOW1412DFM provides reinforced galvanic isolation rated at 5 kV and supports data rates up to 500 kbps over RS-485 and RS-422 differential bus standards. This combination makes it suitable for long-distance multi-drop industrial networks where noise immunity and ground potential differences between nodes require robust isolation of at least 1 kV or higher.
How does the integrated DC-DC converter in the ISOW1412DFM simplify isolated RS-485 interface designs?
By embedding a high-efficiency, low-emissions DC-DC converter directly inside the 20-pin SOIC package, the ISOW1412DFM eliminates the need for external isolated power supply components. This reduces total component count, shrinks PCB area, and lowers EMI emissions on isolated RS-485 bus lines compared to discrete solutions using separate transformer-based isolated converters and standalone transceivers.
In which industrial communication topologies can the ISOW1412DFM operate on a multi-drop RS-485 bus?
The ISOW1412DFM supports EIA-485 multi-drop bus topologies with up to 32 unit loads per network segment, enabling it to interconnect PLCs, sensors, and actuators across distances of up to 1200 meters at lower data rates. Its differential output driver and integrated isolation make it ideal for Modbus RTU, PROFIBUS, and similar industrial fieldbus protocols where each node requires galvanic isolation from the shared communication bus.
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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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