MAX22445

Four-Channel, Fast, Low-Power, Reinforced Isolation 5kVRMS Digital Isolators

Industry's Fastest, Lowest Power Reinforced Digital Isolators


Please check latest availability status for a specific part variant.

Description

The MAX22444–MAX22446 are reinforced, fast, low-power 4-channel digital galvanic isolators using Maxim’s proprietary process technology. These devices transfer digital signals between circuits with different power domains, using as little as 0.74mW per channel at 1Mbps (1.8V supply). All of the devices in the family feature reinforced isolation for a withstand voltage rating of 5kVRMS for 60 seconds.

The MAX22444–MAX22446 family offers all possible unidirectional channel configurations to accommodate any 4-channel design, including SPI, RS-485, and digital I/O applications. Output enable for the A side of the MAX22445R/S/U/V is active-low, making them ideal for isolating a port on a shared SPI bus since the CS signal can directly enable the MISO signal on the isolator. All other output enables in the MAX22444-MAX22446 family are the traditional active-high.

All channels on the MAX22444–MAX22446M/N are always enabled, however, the default state of the outputs of these devices is selectable.

Devices are available with a maximum data rate of either 25Mbps or 200Mbps, and with outputs that are either default-high or default-low. The default is the state the output assumes when the input is either not powered or is open-circuit. See the Ordering Information and Product Selector Guide for suffixes associated with each option. Independent 1.71V to 5.5V supplies on each side of the isolator also make the devices suitable for use as level translators.

All of the devices in the MAX22444–MAX22446 family are available in a 16-pin wide-body SOIC package with 8mm of creepage and clearance. The package material has a minimum comparative tracking index (CTI) of 600V, which gives it a group 1 rating in creepage tables. All devices are rated for operation at ambient temperatures of -40°C to +125°C.


 
MAX22444, MAX22445, MAX22446: Functional Diagram MAX22444, MAX22445, MAX22446: Functional Diagram Enlarge+

Key Features

  • Reinforced Galvanic Isolation for Fast Digital Signals
    • Up to 200Mbps Maximum Data Rate
    • Withstands 5kVRMS for 60s (VISO)
    • Continuously Withstands 1500VRMS (VIOWM)
    • Withstands ±10kV Surge Between GNDA and GNDB with 1.2/50μs waveform
    • High CMTI (50kV/μs, Typical)
  • Low Power Consumption
    • 0.74mW per Channel at 1Mbps with VDD = 1.8V
    • 1.4mW per Channel at 1Mbps with VDD = 3.3V
    • 3.2mW per Channel at 100Mbps with VDD = 1.8V
  • Options to Support a Broad Range of Applications
    • 2 Maximum Data Rates (200Mbps, 25Mbps)
    • 3 Direction Configurations
    • Active-High or Active-Low Enable Inputs
    • 2 Fixed Output Default States (High/Low) or Pin-Selectable (M/N Versions)

Applications/Uses

  • Battery Management
  • Fieldbus Communications for Industrial Automation
  • Isolated RS-485/RS-422, CAN
  • Isolated SPI Interface
  • Medical Systems
Part NumberChannelsUni-directional InputsUni-directional InputsUni-directional Data Rate
(Mbps)
Insulation RatingUni-directional Propagation
(ns)
VSUPPLY
(V)
VSUPPLY
(V)
Oper. Temp.
(°C)
Package/PinsBudgetary
Price
Side ASide BmaxmaxminmaxSee Notes
MAX22445F NEW!4312005000 VRMS101.715.5-40 to +125
SOIC(W)/16
$3.49 @1k
See All Digital Isolators (70)
Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.


MAX22445FWEVKIT: Evaluation Kit for the MAX22444/MAX22445/MAX22446
MAX2244XWEVKIT: Evaluation Kit for the MAX22444/MAX22445/MAX22446

Quality and Environmental Data

Request Reliability Report for: MAX22445 
Lead-Free Package Tin (Sn) Whisker Reports

Additional Resources

Reinforced Digital Isolator Ensures Safety in Industrial Environments


Tools & Models

  • MAX22445 IBIS Model
  • Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

    Related Resources


    MAX22444
    Four-Channel, Fast, Low-Power, Reinforced Isolation 5kVRMS Digital Isolators

    • Reinforced Galvanic Isolation for Fast Digital Signals
    • Low Power Consumption
    • Options to Support a Broad Range of Applications

    MAX22445
    Four-Channel, Fast, Low-Power, Reinforced Isolation 5kVRMS Digital Isolators

    • Reinforced Galvanic Isolation for Fast Digital Signals
    • Low Power Consumption
    • Options to Support a Broad Range of Applications

    MAX22446
    Four-Channel, Fast, Low-Power, Reinforced Isolation 5kVRMS Digital Isolators

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    • Low Power Consumption
    • Options to Support a Broad Range of Applications

    MAX14430
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    MAX14431
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    • Low Power Consumption
    • Options to Support a Broad Range of Applications

    MAX14432
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    • Low Power Consumption
    • Options to Support a Broad Range of Applications

    MAX14851
    Six-Channel Digital Isolator

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