Data Sheet Rev. 1
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Overview

Features and Benefits

  • Robust Protection in Small Footprint
    • Integrated Isolated Field-Side Supply
    • Integrated Galvanic Digital Isolation
    • Integrated Surge and Short Protection with External Series Resistor
      • 24VAC Short Protection
      • ±1kV Line-to-Ground and ±2kV Line-to-Line Surge Tolerance (1.2/50µs Waveform)
    • Compact 8-Pin Wide-Body SOIC Package (5.5mm Creepage)
  • Robust Galvanic Isolation of Digital Signals
    • 3.5kVRMS Isolation Voltage for 60s (VISO)
    • 445VRMS Continuous Working Voltage (VIOWM)
  • Design Flexibility
    • 220μA Field-Side Supply External Load Capability
    • 3V to 5.5V Logic-Side Supply
    • -40°C to +125°C Operating Temperature Range

Product Details

The MAX22517–MAX22519 are dual-channel digital galvanic isolators with integrated field-side supply using Maxim's proprietary process technology. The field-side power is supplied by the logic-side using an integrated isolated DC-DC converter. This approach eliminates the bulky and expensive external isolated power supply when the power demand of the field side is small. All of the devices in the family feature basic isolation with a withstand voltage rating of 3.5kVRMS for 60s or 445VRMS of continuous operation. With a single resistor on each input, the inputs of the MAX22517–MAX22519 can withstand 1.2/50µs surge pulses up to ±2kV between inputs (common mode) or up to ±1kV between input and field ground (differential), as well as continuous shorts to 24VAC. The MAX22517–MAX22519 provide compact, reliable, and cost-efficient solutions for applications such as industrial IoT, industrial networking systems, and building automation.

Both sides of the isolators are powered from a single 3.0V to 5.5V supply on the logic side, which also sets the output logic level. Both channels of the MAX22517–MAX22519 transfer data from the field side to the logic side and are always enabled. Each output is high when the corresponding input is high and low when the corresponding input is low.

Devices are available with either push-pull or open-drain outputs, and output default states are either logic-high (push-pull version) or high impedance (open-drain versions). The default is the state the output assumes when either power domain of the device is undervoltage or the input is open circuit. See the Ordering Information for the part numbers associated with each option.

All of the devices in the MAX22517–MAX22519 family are available in a 8-pin wide-body SOIC package with 5.5mm of creepage and clearance. The package material has a minimum comparative tracking index (CTI) of 400, which gives it a group II rating in creepage tables. All devices are rated for operation at ambient temperatures of -40°C to +125°C.

Applications

  • Industrial IoT
  • Industrial Networking Systems
  • Building Automation
  • Medical Equipment

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