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MAX22517-MAX22519
Self-Powered, 2-Channel, 3.5kV
Digital
RMS
Isolator
General Description
Benefits and Features
The MAX22517–MAX22519 are dual-channel digital gal-
vanic isolators with integrated field-side supply using Max-
im'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 rat-
● 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)
ing of 3.5kV
for 60s or 445V
of continuous oper-
RMS
RMS
ation. 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 automa-
tion.
● Robust Galvanic Isolation of Digital Signals
• 3.5kV
• 445V
Isolation Voltage for 60s (V
Continuous Working Voltage (V
)
RMS
RMS
ISO
)
IOWM
● Design Flexibility
• 220μA Field-Side Supply External Load Capability
• 3V to 5.5V Logic-Side Supply
• -40°C to +125°C Operating Temperature Range
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 correspond-
ing input is high and low when the corresponding input is
low.
Safety Regulatory Approvals
● UL According to UL1577
● cUL According to CSA Bulletin 5A
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 ver-
sions). 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
19-100722; Rev 1; 9/21
Ordering Information appears at end of data sheet.
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