CA-IS3742CLW

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General Quad‐Channel Digital Isolators

The CA‐IS374xC devices provide high electromagnetic immunity and low emissions at low power consumption, while isolating CMOS digital I/O. Each isolation channel has a logic input and output buffer separated by capacitive silicon dioxide (SiO2) insulation barrier, and each channel input integrated Schmitt trigger to provide excellent noise immunity.   The CA‐IS3740C features 4 channels transferring digital signals in one direction and output enable for the B side is active‐high. The CA‐IS3741C device has three forward and one reverse‐direction channels, making it ideal for applications such as isolated SPI, RS‐485 communication. The CA‐IS3742C provides further design flexibility with two channels in each direction. When the input is either not powered or is open‐circuit, the default output is low for devices with suffix L and high for devices with suffix H. The CA‐IS374xC family are specified over the  ‐40°C to +125°C operating temperature range and are available in 8‐ pin SOIC narrow body package, 8‐pin SOIC wide body package and 16‐pin SOIC wide body package.

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  • Features

    Data rate

    DC to 40Mbps

    Robust isolation barrier

    High lifetime: >40 years
    Up to 5000 VRMS isolation rating (Wide body packages)
    ±150 kV/μs typical CMTI

    Wide supply range

    3.0V to 5.5V

    Wide operating temperature range

    ‐40°C to 125°C

    No start‐up initialization required

    Default output High (CA‐IS374xCH) and Low (CA‐ IS374xCL) Options

    High electromagnetic immunity

    Low power consumption

    2.0mA per channel at 1Mbps with VDD = 5.0V
    3.5mA per channel at 40Mbps with VDD = 5.0V

    Best in class propagation delay and skew

    22ns typical propagation delay
    2.5ns propagation delay skew (chip ‐to‐chip)
    1ns pulse width distortion
    20ns minimum pulse width

    CMOS inputs logic

  • Applications

    • Industrial Automation

    • Motor Control

    • Medical Systems

    • Isolated Power Supplies

    • Solar Inverters

    • Isolated ADC, DAC

  • Simplified Functional Diagram

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