CS817x20HS

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Low-power Digital Isolators

The CS817x20/CS817x22 family of ultra-low-power digital isolators used Chipanalog’s “Pulse-Coding” capacitive isolation technology, offering as low as 90μA per channel low quiescent current. These isolated CMOS compatible digital I/Os feature up to 3kVRMS isolation rating and ±150 kV/μs typical CMTI, provide high electromagnetic immunity and low EMI. All device versions have Schmitt trigger inputs for high noise immunity and each isolation; channel has a logic input and output buffer separated by capacitive silicon dioxide (SiO2) insulation barrier, only require two VDD_ bypass capacitors to build a digital signal isolation solution.

The CS817x20/CS817x22 family of devices offers all possible unidirectional channel configurations to accommodate 2-channel design digital I/O applications. The CS817x20HS and CS817x20LS feature 2 channels transferring digital signals in one direction; The CS817x22HS and CS817x22LS devices have one forward and one reverse-direction channel. All devices of this family feature default outputs. When the input is either not powered or is open-circuit, the default output is low for devices with suffix LS and high for devices with suffix HS, see the Ordering Information for suffixes associated with each option.

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  • Features

    Ultra Low Power

    90µA per channel at DC with 3.3V operation
    100µA per channel at 10kbps with 3.3V operation
    160µA per channel at 200kbps with 3.3V operation

    Data Rate is up to 200kbps

    Wide Operating Supply Voltage

    2.375V to 5.5V

    Robust Galvanic Isolation of Digital Signals

    High lifetime: >40 years
    Up to 3kVRMS isolation rating
    ±150 kV/μs typical CMTI
    Schmitt trigger inputs for high noise immunity
    High electromagnetic immunity

    No Start-up Initialization Required

    Wide operating temperature range

    -40°C to 105°C

    Default Output High (CS817x2xHS) and Low (CS817x2xLS) Options

    RoHS-Compliant Package

    SOIC8(S) narrow body

  • Applications

    • Li+ Battery Protection

    • Home Appliances

    • Industrial automation systems

    • Motor control

    • Medical electronics

    • Isolated switch mode supplies

    • Power inverters

  • Device Information

    Part numberPackagePackage size (NOM)

    CS817x20HS

    CS817x20LS

    CS817x22HS

    CS817x22LS

    SOIC8-NB(S)4.90mm×3.90mm
  • Simplified Functional Diagram

    cs81720cs81722.jpg