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High Reliability Bidirectional I2C Isolators

Part Number: NSi8100
Brand: Novosense


The NSi8100 devices are high-reliability bidirectional isolators designed for use with the I2C interface. They offer a range of features and specifications that make them suitable for various applications. Here’s an overview of their key features and applications:

Key Features:

  1. Insulation Voltage: The NSi8100 devices provide up to 5000Vrms of insulation voltage, ensuring strong electrical isolation between connected devices.
  2. I2C Clock Rate: They support I2C clock rates of up to 2MHz, enabling efficient data transfer at high speeds.
  3. Power Supply Voltage: These devices can operate within a wide power supply voltage range of 2.5V to 5.5V, making them compatible with a broad range of digital interfaces.
  4. Common-Mode Transient Immunity (CMTI): The NSi8100 isolators offer a high CMTI of 150kV/μs, which helps them withstand fast voltage transients on the I2C lines.
  5. Chip-Level ESD Protection: They have chip-level ESD protection with a rating of ±6kV for Human Body Model (HBM), ensuring robustness against electrostatic discharge.
  6. System-Level EMC Performance: These isolators are designed to provide enhanced system-level immunity to ESD (Electrostatic Discharge), EFT (Electrical Fast Transients), and Surge events.
  7. Low Power Consumption: Each channel of the NSi8100 consumes low power, with a current rating of 1.5mA per channel at 1 Mbps data rate.
  8. Low Propagation Delay: The isolators have low propagation delay of less than 15ns, ensuring minimal signal delay in communication.
  9. Operating Temperature Range: They can operate within a wide temperature range, from -40°C to 125°C, suitable for a variety of environmental conditions.
  10. RoHS-Compliant Packages: The NSi8100 devices are available in RoHS-compliant packages, including SOP8 and SOW16.

Safety Regulatory Approvals:

These isolators have undergone safety certification and regulatory approvals, including:

  • UL recognition: Up to 5000Vrms for 1 minute per UL1577.
  • CQC certification per GB4943.1-2011.
  • CSA component notice 5A.
  • DIN VDE V 0884-11:2017-01.


The NSi8100 devices are versatile and find applications in various scenarios, including:

  • Power over Ethernet (PoE) applications.
  • Isolated I2C, SMBus, or PMBus interfaces.
  • I2C level shifting for interfacing with devices operating at different voltage levels.
  • Battery management systems and other applications requiring robust isolation and communication.

These isolators are designed to meet stringent safety and performance requirements, making them suitable for use in critical systems where reliable data communication and electrical isolation are essential.


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