High Reliability Isolated Half and Full-Duplex RS-485 Transceivers

Description

The NSi83085E and NSi83086E are RS-485 transceiver ICs (Integrated Circuits) that provide isolated communication for half-duplex and full-duplex RS-485 networks, respectively. Here are some key features and characteristics of these devices:

1. Isolation Technology: Both NSi83085E and NSi83086E use NOVOSENSE digital isolation technology, which provides high reliability and isolation between the RS-485 bus and the rest of the system.
2. Safety Certification: These devices are certified by UL1577, which ensures they meet safety standards. They support 5kVrms insulation withstand voltages, making them suitable for applications where electrical isolation is crucial.
3. ESD Protection: The Bus pins of these devices are protected from system-level ESD (Electrostatic Discharge) up to ±10kV to GND2 on the Bus side. This feature helps protect the ICs from damage due to static electricity.
4. Fail-Safe Circuitry: Both transceivers feature fail-safe circuitry, which guarantees a logic-high receiver output when the receiver inputs are open or shorted. This ensures that the bus remains in a known state in case of communication disruptions.
5. Receiver Input Impedance: The devices have a 1/8-unit-load receiver input impedance, which allows for the connection of multiple transceivers on the same bus. With this impedance, you can connect up to 256 transceivers on the bus, making them suitable for large network applications.
6. Data Rate:
   • NSi83085E: The data rate of NSi83085E is 12Mbps. This device is slew limited to reduce EMI (Electromagnetic Interference) and reflections on improperly terminated transmission lines.
   • NSi83086E: The data rate of NSi83086E is up to 16Mbps, making it suitable for higher-speed RS-485 communication applications.
7. Electromagnetic Immunity and Low Emissions: Both transceivers are designed to provide high electromagnetic immunity and low emissions. This is important for ensuring reliable communication in noisy industrial environments while keeping power consumption low.

In summary, these RS-485 transceivers, NSi83085E and NSi83086E, are designed for applications where isolation, reliability, and noise immunity are critical. They support different data rates and provide features such as ESD protection, fail-safe operation, and the ability to connect multiple transceivers on the same bus, making them versatile for a wide range of industrial and communication applications.