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Isolation ICs (also called isolator ICs) provide complete galvanic isolation between two power domains. Isolation ICs protect circuits from high common-mode transients and faults and eliminate ground loops. Isolation ICs are commonly used in industrial communications and medical applications.

Digital Signal Isolators

Our digital signal isolator products provide up to 5kV of isolation and support data rates up to 200Mbps. Digital isolators are replacing optocouplers in many applications because they offer the same isolation capability while reducing power requirements and using less board space. Products are available for use with many industry communication standards.

When used with Maxim's industrial digital input level translator and serializers, these digital isolators provide a complete digital input solution that saves design space increases reliability, and reduces power requirements.

Looking for an isolated power solution? Visit our Isolated Power page.

Isolated RS-232 Transceivers

Maxim offers two options that address RS-232 communication where isolation is required. First is...

Isolated RS-485/RS-422 Transceivers

Maxim integrates galvanic isolation in our RS-485/RS-422 transceivers to eliminate the need for ...

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Introduction to the MAX22195 High-Speed, Octal, Industrial Digital Input with Parallel Output
4:50 September 14, 2018

Featured Products

MAX22421 Reinforced, Ultra-Low-Power, Two-Channel Digital Isolators

MAX22421 Reinforced, Ultra-Low-Power, Two-Channel Digital Isolators

The MAX22_2_ are a family of 2-channel reinforced ultra-low-power digital isolators. The MAX22_2...
  • Ultra-Low Power Consumption
    • 11.4µA per Channel at DC with VDD = 3.3V
    • 15.4µA per Channel at 100kbps with VDD = 3.3V
    • 54.7µA per Channel at 1Mbps with VDD = 3.3V
  • Wide Supply Range Supports from 1.71V to 5.5V
  • Reinforced Galvanic Isolation for Digital Signals
    • 8-NSOIC with 4mm Creepage and Clearance Withstands 3kVRMS for 60s (VISO) and Continuously Withstands 445VRMS (VIOWM)
    • 8-WSOIC with 8mm Creepage and Clearance Withstands 5kVRMS for 60s (VISO) and Continuously Withstands 848VRMS (VIOWM)
    • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50µs Waveform
    • High CMTI (200kV/µs, min)
  • Low Propagation Delay and Low Jitter
    • Maximum Data Rate Up to 10Mbps
    • Low Propagation Delay 51ns (typ) at VDD = 3.3V
    • Clock Jitter RMS 15.4ps (typ)
  • Safety Regulatory Approvals
    • UL According to UL1577
    • cUL According to CSA Bulletin 5A
    • VDE 0884-11 Reinforced Insulation (Pending)
    • IECEx and ATEX Intrinsic Safety (IS): Sira 0518 II 1G Ex ia IIC Ga (Pending)
MAX22420 Reinforced, Ultra-Low-Power, Two-Channel Digital Isolators

MAX22420 Reinforced, Ultra-Low-Power, Two-Channel Digital Isolators

The MAX22_2_ are a family of 2-channel reinforced ultra-low-power digital isolators. The MAX22_2...
  • Ultra-Low Power Consumption
    • 11.4µA per Channel at DC with VDD = 3.3V
    • 15.4µA per Channel at 100kbps with VDD = 3.3V
    • 54.7µA per Channel at 1Mbps with VDD = 3.3V
  • Wide Supply Range Supports from 1.71V to 5.5V
  • Reinforced Galvanic Isolation for Digital Signals
    • 8-NSOIC with 4mm Creepage and Clearance Withstands 3kVRMS for 60s (VISO) and Continuously Withstands 445VRMS (VIOWM)
    • 8-WSOIC with 8mm Creepage and Clearance Withstands 5kVRMS for 60s (VISO) and Continuously Withstands 848VRMS (VIOWM)
    • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50µs Waveform
    • High CMTI (200kV/µs, min)
  • Low Propagation Delay and Low Jitter
    • Maximum Data Rate Up to 10Mbps
    • Low Propagation Delay 51ns (typ) at VDD = 3.3V
    • Clock Jitter RMS 15.4ps (typ)
  • Safety Regulatory Approvals
    • UL According to UL1577
    • cUL According to CSA Bulletin 5A
    • VDE 0884-11 Reinforced Insulation (Pending)
    • IECEx and ATEX Intrinsic Safety (IS): Sira 0518 II 1G Ex ia IIC Ga (Pending)
MAX22820 Reinforced, Ultra-Low-Power, Two-Channel Digital Isolators

MAX22820 Reinforced, Ultra-Low-Power, Two-Channel Digital Isolators

The MAX22_2_ are a family of 2-channel reinforced ultra-low-power digital isolators. The MAX22_2...
  • Ultra-Low Power Consumption
    • 11.4µA per Channel at DC with VDD = 3.3V
    • 15.4µA per Channel at 100kbps with VDD = 3.3V
    • 54.7µA per Channel at 1Mbps with VDD = 3.3V
  • Wide Supply Range Supports from 1.71V to 5.5V
  • Reinforced Galvanic Isolation for Digital Signals
    • 8-NSOIC with 4mm Creepage and Clearance Withstands 3kVRMS for 60s (VISO) and Continuously Withstands 445VRMS (VIOWM)
    • 8-WSOIC with 8mm Creepage and Clearance Withstands 5kVRMS for 60s (VISO) and Continuously Withstands 848VRMS (VIOWM)
    • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50µs Waveform
    • High CMTI (200kV/µs, min)
  • Low Propagation Delay and Low Jitter
    • Maximum Data Rate Up to 10Mbps
    • Low Propagation Delay 51ns (typ) at VDD = 3.3V
    • Clock Jitter RMS 15.4ps (typ)
  • Safety Regulatory Approvals
    • UL According to UL1577
    • cUL According to CSA Bulletin 5A
    • VDE 0884-11 Reinforced Insulation (Pending)
    • IECEx and ATEX Intrinsic Safety (IS): Sira 0518 II 1G Ex ia IIC Ga (Pending)
MAX22821 Reinforced, Ultra-Low-Power, Two-Channel Digital Isolators

MAX22821 Reinforced, Ultra-Low-Power, Two-Channel Digital Isolators

The MAX22_2_ are a family of 2-channel reinforced ultra-low-power digital isolators. The MAX22_2...
  • Ultra-Low Power Consumption
    • 11.4µA per Channel at DC with VDD = 3.3V
    • 15.4µA per Channel at 100kbps with VDD = 3.3V
    • 54.7µA per Channel at 1Mbps with VDD = 3.3V
  • Wide Supply Range Supports from 1.71V to 5.5V
  • Reinforced Galvanic Isolation for Digital Signals
    • 8-NSOIC with 4mm Creepage and Clearance Withstands 3kVRMS for 60s (VISO) and Continuously Withstands 445VRMS (VIOWM)
    • 8-WSOIC with 8mm Creepage and Clearance Withstands 5kVRMS for 60s (VISO) and Continuously Withstands 848VRMS (VIOWM)
    • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50µs Waveform
    • High CMTI (200kV/µs, min)
  • Low Propagation Delay and Low Jitter
    • Maximum Data Rate Up to 10Mbps
    • Low Propagation Delay 51ns (typ) at VDD = 3.3V
    • Clock Jitter RMS 15.4ps (typ)
  • Safety Regulatory Approvals
    • UL According to UL1577
    • cUL According to CSA Bulletin 5A
    • VDE 0884-11 Reinforced Insulation (Pending)
    • IECEx and ATEX Intrinsic Safety (IS): Sira 0518 II 1G Ex ia IIC Ga (Pending)
MAX22421BSEVKIT Evaluation Kit for the <a href="/en/products/MAX22420">MAX22420</a>/<a href="/en/products/MAX22421">MAX22421</a>/<a href="/en/products/MAX22820">MAX22820</a>/<a href="/en/products/MAX22820">MAX22821</a>

MAX22421BSEVKIT Evaluation Kit for the MAX22420/MAX22421/MAX22820/MAX22821

The MAX22420/MAX22421 evaluation kits (EV kits) provide a proven design to evaluate the MAX22420...
  • Ultra-Low-Power Operation
  • Data Transfer Rates up to 10Mbps
  • MAX22420 with 2:0 Channel Configuration MAX22421 with 1:1 Channel Configuration
  • SMA Connectors for Easy Connection to External Equipment
  • Wide Power Supply Voltage Range from 1.71V to 5.5V
  • Guaranteed up to 3kVRMS Isolation for the 60s
  • -40° C to +125° C Temperature Range
  • Proven PCB Layout
MAX2242XSEVKIT Evaluation Kit for the <a href="/en/products/MAX22420">MAX22420</a>/<a href="/en/products/MAX22421">MAX22421</a>/<a href="/en/products/MAX22820">MAX22820</a>/<a href="/en/products/MAX22820">MAX22821</a>

MAX2242XSEVKIT Evaluation Kit for the MAX22420/MAX22421/MAX22820/MAX22821

The MAX22420/MAX22421 evaluation kits (EV kits) provide a proven design to evaluate the MAX22420...
  • Ultra-Low-Power Operation
  • Data Transfer Rates up to 10Mbps
  • MAX22420 with 2:0 Channel Configuration MAX22421 with 1:1 Channel Configuration
  • SMA Connectors for Easy Connection to External Equipment
  • Wide Power Supply Voltage Range from 1.71V to 5.5V
  • Guaranteed up to 3kVRMS Isolation for the 60s
  • -40° C to +125° C Temperature Range
  • Proven PCB Layout
MAX22163 Reinforced, Fast, Low-Power, Six-Channel Digital Isolators

MAX22163 Reinforced, Fast, Low-Power, Six-Channel Digital Isolators

The MAX22163−MAX22166 are a family of six-channel, reinforced, fast, low-power digital galvanic ...
  • AEC-Q100 Qualification for /V Devices
  • Reinforced Galvanic Isolation for Digital Signals
    • 16-QSOP with 4mm Creepage and Clearance
    • Withstands 3kVRMS for 60s (VISO)
    • Continuously Withstands 445VRMS (VIOWM)
    • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50µs Waveform
    • High CMTI (50kV/µs, typ)
  • Low Power Consumption
    • 0.71mW per Channel at 1Mbps with VDD = 1.8V
    • 1.34mW per Channel at 1Mbps with VDD = 3.3V
    • 3.21mW per Channel at 100Mbps with VDD = 1.8V
  • Low Propagation Delay and Low Jitter
    • Maximum Data Rate up to 200Mbps
    • Low Propagation Delay 7ns (typ) at VDD = 3.3V
    • Clock Jitter RMS 11.1ps (typ)
  • Safety Regulatory Approvals
    • UL According to UL1577
    • cUL According to CSA Bulletin 5A
    • VDE 0884-11 Reinforced Insulation (Pending)
MAX22164 Reinforced, Fast, Low-Power, Six-Channel Digital Isolators

MAX22164 Reinforced, Fast, Low-Power, Six-Channel Digital Isolators

The MAX22163−MAX22166 are a family of six-channel, reinforced, fast, low-power digital galvanic ...
  • AEC-Q100 Qualification for /V Devices
  • Reinforced Galvanic Isolation for Digital Signals
    • 16-QSOP with 4mm Creepage and Clearance
    • Withstands 3kVRMS for 60s (VISO)
    • Continuously Withstands 445VRMS (VIOWM)
    • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50µs Waveform
    • High CMTI (50kV/µs, typ)
  • Low Power Consumption
    • 0.71mW per Channel at 1Mbps with VDD = 1.8V
    • 1.34mW per Channel at 1Mbps with VDD = 3.3V
    • 3.21mW per Channel at 100Mbps with VDD = 1.8V
  • Low Propagation Delay and Low Jitter
    • Maximum Data Rate up to 200Mbps
    • Low Propagation Delay 7ns (typ) at VDD = 3.3V
    • Clock Jitter RMS 11.1ps (typ)
  • Safety Regulatory Approvals
    • UL According to UL1577
    • cUL According to CSA Bulletin 5A
    • VDE 0884-11 Reinforced Insulation (Pending)
MAX22165 Reinforced, Fast, Low-Power, Six-Channel Digital Isolators

MAX22165 Reinforced, Fast, Low-Power, Six-Channel Digital Isolators

The MAX22163−MAX22166 are a family of six-channel, reinforced, fast, low-power digital galvanic ...
  • AEC-Q100 Qualification for /V Devices
  • Reinforced Galvanic Isolation for Digital Signals
    • 16-QSOP with 4mm Creepage and Clearance
    • Withstands 3kVRMS for 60s (VISO)
    • Continuously Withstands 445VRMS (VIOWM)
    • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50µs Waveform
    • High CMTI (50kV/µs, typ)
  • Low Power Consumption
    • 0.71mW per Channel at 1Mbps with VDD = 1.8V
    • 1.34mW per Channel at 1Mbps with VDD = 3.3V
    • 3.21mW per Channel at 100Mbps with VDD = 1.8V
  • Low Propagation Delay and Low Jitter
    • Maximum Data Rate up to 200Mbps
    • Low Propagation Delay 7ns (typ) at VDD = 3.3V
    • Clock Jitter RMS 11.1ps (typ)
  • Safety Regulatory Approvals
    • UL According to UL1577
    • cUL According to CSA Bulletin 5A
    • VDE 0884-11 Reinforced Insulation (Pending)
MAX22166 Reinforced, Fast, Low-Power, Six-Channel Digital Isolators

MAX22166 Reinforced, Fast, Low-Power, Six-Channel Digital Isolators

The MAX22163−MAX22166 are a family of six-channel, reinforced, fast, low-power digital galvanic ...
  • AEC-Q100 Qualification for /V Devices
  • Reinforced Galvanic Isolation for Digital Signals
    • 16-QSOP with 4mm Creepage and Clearance
    • Withstands 3kVRMS for 60s (VISO)
    • Continuously Withstands 445VRMS (VIOWM)
    • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50µs Waveform
    • High CMTI (50kV/µs, typ)
  • Low Power Consumption
    • 0.71mW per Channel at 1Mbps with VDD = 1.8V
    • 1.34mW per Channel at 1Mbps with VDD = 3.3V
    • 3.21mW per Channel at 100Mbps with VDD = 1.8V
  • Low Propagation Delay and Low Jitter
    • Maximum Data Rate up to 200Mbps
    • Low Propagation Delay 7ns (typ) at VDD = 3.3V
    • Clock Jitter RMS 11.1ps (typ)
  • Safety Regulatory Approvals
    • UL According to UL1577
    • cUL According to CSA Bulletin 5A
    • VDE 0884-11 Reinforced Insulation (Pending)