CA-IS3740LN

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Quad Channel Standard Digital Isolators

The CA‐IS374x devices are high‐performance four‐ channel, unidirectional digital isolators with up to 5kVRMS wide‐body package isolation rating and DC to 150Mbps ultra‐fast data rate. The CA‐IS374x devices offer high electromagnetic immunity and low emissions at low power consumption while isolating different ground domains and block high‐ voltage/high‐current transients from sensitive or human interface circuitry. Each isolation channel has a logic input and output buffer separated by capacitive silicon dioxide (SiO2) insulation barrier, the integrated Schmitt trigger on each input provide excellent noise immunity in automotive applications.

The CA‐IS374x family offers all possible unidirectional channel configurations to accommodate any 4‐channel design. The CA‐IS3740 features 4 channels transferring digital signals in one direction and output enable for the B side is active‐high. The CA‐IS3741 device has three forward and one reverse‐direction channels, making it ideal for applications such as isolated SPI, RS‐485 communication. The CA‐IS3742 provides further design flexibility with two channels in each direction. Both CA‐IS3741 and CA‐IS3742 come with individual enable control pinsfor each side of the isolator which can be used to put the outputs in high impedance for multi‐master driving applications to reduce power consumption.

The CA‐IS374x family features default outputs. 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, see the Ordering Information for suffixes associated with each option.

The CA‐IS374x family devices are specified over the ‐40°C to +125°C operating temperature range and are available in 16‐pin SOIC wide body package, 16‐pin SOIC narrow body package and 16‐pin SSOP narrow body package .

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  • Features

    Data Rate

    DC to 150Mbps

    Robust Galvanic Isolation of Digital Signals

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

    Wide Supply Range

    2.5V to 5.5V

    Wide Operating Temperature Range

    -40°C to 125°C

    Schmitt Trigger Inputs

    Enable Control Input With Tristate Output Function

    Default Output High (CA-IS374xH) and Low (CA-IS374xL) Options

    High Electromagnetic Immunity

    No Start-Up Initialization Required

    Low Power Consumption

    1.5mA per channel at 1Mbps with VDD)_ = 5.0V
    6.6mA per channel at 100Mbps with VDD_ = 5.0V

    Best in Class Propagation Delay and Skew

    12ns typical propagation delay
    2ns propagation delay
    1ns pulse width distortion
    5ns minimum pulse width

    Package Options

    Narrow-body SOIC16-NB(N) package
    Narrow-body SSOP16-NB(B) package
    Wide-body SOIC16-WB(W) package

    Safety Regulatory Approvals

    VDE 0884-11 isolation certification
    UL According to UL1577
    IEC 62368-1, IEC 61010-1, GB 4943.1-2011 and GB 8898-2011 certifications

  • Applications

    • Industrial Automation

    • Motor Control

    • Medical Systems

    • Isolated Power Supplies

    • Solar Inverter

    • Isolated ADC,DAC

  • Device Information

    Part number Package Package size (NOM)
    CA-IS3740
    CA-IS3741
    CA-IS3742
    SOIC16-NB (N) 9.90 mm × 3.90 mm
    SOIC16-WB(W) 10.30 mm × 7.50 mm
    SSOP16-NB(B) 4.90 mm × 3.90 mm
  • Simplified Functional Diagram

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