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The MAX22444CAWE+ 4-channel digital isolator is an enhanced fast, low-power digital isolator. The device is designed to transfer digital signals between circuits with different power domains and consumes 0.74 mW per channel at 1 Mbps. The MAX22444 isolator offers unidirectional channel configurations to support any 4-channel design, including SPI, RS-485, and digital I/O applications. This digital isolation channel is always enabled and the default state of its output is selectable.

Available in data rates of 25Mbps or 200Mbps, the MAX22444CAWE+ isolators have independent 1.71V to 5.5V supplies on each side of the isolator and feature a 3-way configuration. These devices operate over a temperature range of -40°C to 125°C. The MAX22444 4-channel digital isolators are available in a 16-pin wide-body SOIC package with 8 mm creepage and electrical clearance. Typical applications include isolated SPI interfaces, battery management, isolated RS-485/RS-422, and medical systems.

Benefits and Features 

● Reinforced Galvanic Isolation for Fast Digital Signals

• Up to 200Mbps Maximum Data Rate

• Withstands 5kVRMS for 60s (VISO)

• Continuously Withstands 1500VRMS (VIOWM)

• Withstands ±12.8kV 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 PinSelectable (M/N Versions)

Applications 

● Isolated SPI Interface

● Fieldbus Communications for Industrial Automation

● Isolated RS-485/RS-422, CAN

● Battery Management

● Medical Systems

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