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onsemi NCIx9211 Dual-Channel Digital Isolators

onsemi NCIx9211 Dual-Channel Digital Isolators are galvanically isolated full-duplex, bi-directional, high-speed dual-channel digital isolators with output enable. These devices support isolated communications, allowing digital signals to communicate between systems without conducting ground loops or hazardous voltages. The NCIx9211 utilizes the onsemi patented galvanic off-chip capacitor isolation technology and optimized IC design. The digital isolators achieve high insulation and high noise immunity, characterized by high common-mode rejection and power supply rejection specifications. The thick ceramic substrate yields capacitors with ~25 times the thickness of thin-film on-chip capacitors and coreless transformers. The result is a combination of the electrical performance benefits that digital isolators offer with the safety reliability of a >0.5mm insulator barrier similar to what optocouplers have historically offered. The onsemi NCIx9211 Dual-Channel Digital Isolators are housed in a 16-pin wide-body small outline package. 

Features

  • Off-chip capacitive isolation to achieve reliable high-voltage insulation
    • ≥0.5mm distance through insulation (DTI)
    • 2000Vpeak maximum working insulation voltage
  • Full duplex, bi-directional communication
  • 100KV/s minimum common-mode rejection
  • High speed
    • 50Mbit/s data rate (NRZ)
    • 25ns maximum propagation delay
    • 10ns maximum pulse width distortion
  • 2.5V to 5.5V supply voltage
  • Over-temperature detection
  • 8mm creepage and clearance distance to achieve reliable high-voltage insulation
  • -40°C to +125°C extended temperature range
  • Output enable function (primary and secondary side)
  • NCIV prefix for automotive and other applications requiring unique site and control change requirements; AEC-Q100 qualified and PPAP capable (pending)
  • Safety and regulatory approvals
    • UL1577, 5000VRMS for 1 minute
    • DIN VDE V 0884-11 (pending)

Applications

  • Isolated PWM control
  • Industrial field bus communications
  • Microprocessor system interfaces (SPI and I2C)
  • Programmable logic control
  • Isolated data acquisition systems
  • Voltage level translator

Videos

Functional Block Diagram

Block Diagram - onsemi NCIx9211 Dual-Channel Digital Isolators
Inilathala: 2020-06-30 | Na-update: 2025-09-02