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Analog Devices Inc./Maxim Integrated MAX22444FAWE+
- Part No.:
- MAX22444FAWE+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
MAX22444FAWE+.pdf
- Description:
- FOUR CHANNEL, LOW POWER, HIGH SP
- Quantity:
- Payment:
- Shipping:
Inventory:843
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Product details
Overview
The MAX22444FAWE+ from Analog Devices is a reinforced, 4-channel digital galvanic isolator in a 16-pin wide-body SOIC package, delivering 200Mbps maximum data rate, 5kVRMS withstand voltage (60s), and 50kV/μs CMTI. It features unidirectional channel configuration, 1.71V–5.5V dual-supply operation per side, and default-high output state - optimized for isolated SPI, RS-485, and industrial fieldbus interfaces.
For engineers reviewing the MAX22444FAWE+ datasheet, MAX22444FAWE+ pinout, MAX22444FAWE+ application, or MAX22444FAWE+ equivalent, this device supports high-speed isolation with low power (0.74mW/channel @ 1Mbps, 1.8V), reinforced safety certification (UL, cUL, VDE), and level-shifting capability across isolated domains.
Technical Context
The MAX22444FAWE+ implements capacitive-based galvanic isolation using Maxim's proprietary process, enabling signal transfer between circuits with independent power domains while maintaining reinforced insulation integrity. Its architecture supports independent 1.71V–5.5V supplies on both sides, allowing bidirectional level translation without external components.
All four channels are unidirectional (A→B), always enabled, and configured with fixed default-high outputs. It exhibits low propagation delay (4.1–9.2ns tPLH at 4.5–5.5V), tight channel-to-channel skew (≤2.0ns), and robust noise immunity via 50kV/μs common-mode transient immunity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Max Data Rate | 200Mbps - enables high-speed serial interfaces like isolated SPI clock/data lines or fast digital I/O. |
| Isolation Withstand Voltage | 5kVRMS for 60s - meets reinforced insulation requirements for industrial and medical safety standards. |
| CMTI | 50kV/μs typical - ensures reliable operation in noisy motor drives or power converters with fast transients. |
| Supply Voltage Range | 1.71V to 5.5V per side - supports mixed-voltage systems (e.g., 1.8V MCU side / 3.3V peripheral side). |
| Power per Channel | 0.74mW @ 1Mbps, 1.8V - reduces thermal load and enables battery-powered or energy-constrained isolated nodes. |
| Propagation Delay | 4.1–20.3ns (voltage-dependent) - guarantees timing-critical signal integrity in real-time control loops. |
| Operating Temperature | −40°C to +125°C - qualified for under-hood automotive, industrial PLC, and harsh-environment applications. |
Pinout & Package
Package: 16-pin wide-body SOIC (W16MS+12), 8mm creepage/clearance, CTI ≥400 (Group II).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Side A supply | 1.71V–5.5V logic-side power; powers input circuitry and A-side outputs. |
| GNDA | Side A ground | Reference for all Side A signals; must be isolated from GNDB. |
| IN1–IN4 | Input signals (Side A) | Digital inputs referenced to GNDA; accept 0.7×VDDA high threshold. |
| OUT1–OUT4 | Output signals (Side B) | Default-high CMOS outputs referenced to GNDB; drive 4mA sink / -4mA source. |
| VDDB | Side B supply | 1.71V–5.5V isolated-side power; powers output drivers and B-side logic. |
| GNDB | Side B ground | Reference for all Side B signals; galvanically isolated from GNDA. |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation | 5kVRMS (60s), VIOWM = 1500VRMS continuous - certified to UL1577, CSA 5A, and VDE 0884-11. |
| High-Speed Operation | 200Mbps max data rate with <20.3ns worst-case propagation delay - suitable for SPI clock rates up to 100MHz. |
| Low-Power Architecture | 0.74mW/channel @ 1Mbps, 1.8V - enables integration into power-sensitive isolated sensor nodes. |
| Wide Supply Flexibility | Independent 1.71V–5.5V rails on each side - eliminates level shifters in mixed-voltage isolation bridges. |
| Robust Noise Immunity | 50kV/μs CMTI and ±12.8kV surge rating (1.2/50μs) - survives EFT and lightning-induced transients in factory floors. |
Applications
| Isolated SPI Interface | Industrial Fieldbus Communication |
|---|---|
Use Scenario: Isolating SPI master (MCU) from slave peripherals (ADCs, DACs, sensors) in high-noise PLC backplanes. IC Role / Device Role / Timing Role: Unidirectional A→B signal translator for SCLK, MOSI, MISO, and CS lines with precise timing alignment. Use Value: Prevents ground loop currents and noise coupling while preserving 200Mbps throughput and sub-10ns channel skew. |
Use Scenario: Signal isolation in Modbus RTU or Profibus DP nodes connected to motor drives and I/O modules. IC Role / Device Role / Timing Role: Galvanic barrier for UART-level serial data, enabling interoperability across different ground potentials. Use Value: Maintains data integrity under 50kV/μs transients common in factory automation, with −40°C to +125°C operation. |
| Isolated RS-485 Transceiver Interface | Battery Management System (BMS) |
Use Scenario: Isolating RS-485 transceiver control lines (DE/RE) and data lines (A/B) in distributed energy storage systems. IC Role / Device Role / Timing Role: High-CMTI digital isolator for direction control and data path separation between controller and bus PHY. Use Value: Enables safe, noise-immune communication over long cables in solar inverters or EV charging stations. |
Use Scenario: Isolating cell monitoring ICs (e.g., analog front-ends) from host MCU in multi-cell lithium-ion battery packs. IC Role / Device Role / Timing Role: Reliable, low-power digital isolator for status reporting and command transmission across high-voltage barriers. Use Value: Supports functional safety requirements with reinforced isolation and 125°C ambient rating for under-hood BMS units. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8640ED-B-IS | 4-channel, 200Mbps, 5kVRMS, but uses silicon-dioxide isolation; higher CMTI (75kV/μs); no default-state selection. | Preferred where ultra-high noise immunity is critical (e.g., motor control gate drivers); lacks pin-selectable defaults. | Choose Si8640ED-B-IS when CMTI >50kV/μs is mandatory and default output state is not required. |
| ISO6741FDWR | 4-channel, 50Mbps max, 5kVRMS, 3.75kV RMS working voltage; lower power (0.5mW/ch @ 1Mbps); smaller SOIC-16 package (3.9mm width). | Suitable for cost-sensitive, lower-speed applications (e.g., isolated GPIO, slow serial buses); not rated for 200Mbps SPI. | Choose ISO6741FDWR for space-constrained designs with ≤50Mbps bandwidth and tighter BOM cost targets. |
Compared with Si8640ED-B-IS and ISO6741FDWR, the MAX22444FAWE+ uniquely combines 200Mbps speed, default-high output, and 0.74mW/channel efficiency in a wide-body SOIC - making it optimal for high-performance isolated SPI and industrial fieldbus where timing, power, and safety coexist.
Availability
The MAX22444FAWE+ is available at Aetrix Electronics and suitable for isolated SPI interfaces, industrial fieldbus nodes, and battery management systems requiring stable component supply, long-term lifecycle support, and full regulatory compliance.
Supply support for MAX22444FAWE+ includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Analog Devices is a global leader in high-performance analog, mixed-signal, and digital signal processing technologies, serving industrial, automotive, communications, and healthcare markets.
The MAX22444–MAX22446 family was designed specifically for high-speed, low-power, reinforced-isolation applications in harsh industrial environments - emphasizing safety certification, noise resilience, and supply flexibility.
FAQ
What is the maximum data rate supported by the MAX22444FAWE+?
The MAX22444FAWE+ supports a maximum data rate of 200Mbps at supply voltages ≥2.25V. At lower supplies (1.71V–2.25V), the guaranteed maximum drops to 150Mbps. This performance enables use in high-speed isolated SPI, fast digital I/O, and time-critical industrial protocols without timing bottlenecks.
Does the MAX22444FAWE+ require external enable signals to operate?
No - the MAX22444FAWE+ has no enable pins; all four channels are always enabled. Unlike variants such as MAX22445R/S/U/V, this part does not include ENA/ENB inputs. Its outputs assume a default-high state when inputs are unpowered or open-circuit, simplifying interface design for always-on isolation paths.
What safety certifications does the MAX22444FAWE+ hold?
The MAX22444FAWE+ is certified to UL1577 (5000VRMS, single protection), CSA Bulletin 5A (cUL), and VDE 0884-11:2017 (reinforced insulation, 8000VPK surge). It meets reinforced isolation requirements with 5kVRMS withstand (60s), 1500VRMS working voltage, and 12.8kV surge immunity - validated for industrial and medical applications.
Can the MAX22444FAWE+ be used for level translation between different voltage domains?
Yes - the MAX22444FAWE+ supports independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB), enabling seamless level translation. For example, it can isolate a 1.8V FPGA core from a 3.3V RS-485 transceiver without external level shifters, preserving signal integrity and timing margins.
What is the typical power consumption of the MAX22444FAWE+ at 1Mbps and 1.8V supply?
At 1Mbps and 1.8V supply, the MAX22444FAWE+ consumes 0.74mW per channel - totaling ~2.96mW for all four channels. This ultra-low power enables deployment in thermally constrained or battery-operated isolated subsystems while maintaining full 200Mbps capability for burst-mode operation.
MAX22444FAWE+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- Yes
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 5000Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs (Typ)
- Data Rate:
- 200Mbps
- Propagation Delay tpLH / tpHL (Max):
- 9.2ns, 9.4ns
- Pulse Width Distortion (Max):
- 2ns
- Rise / Fall Time (Typ):
- 0.8ns, 1ns (Max)
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX22444FAWE+ FAQ
1.How can I place an order for MAX22444FAWE+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22444FAWE+ on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX22444FAWE+ reliable?
The price and inventory of MAX22444FAWE+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22444FAWE+ is usually 5 days.
3.What payment methods are accepted for MAX22444FAWE+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22444FAWE+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22444FAWE+?
MAX22444FAWE+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22444FAWE+ order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX22444FAWE+?
For technical support, including MAX22444FAWE+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22444FAWE+ requirements.
6.How does Aetrix verify that MAX22444FAWE+ is sourced from the original manufacturer or authorized distributors?
All MAX22444FAWE+ products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX22444FAWE+ meets industry standards.
7.What is the process for return or replacement of MAX22444FAWE+?
All MAX22444FAWE+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22444FAWE+, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX22444FAWE+ part is unused and in its original packaging.
Return procedure for MAX22444FAWE+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX22444FAWE+ Tags
-
ISO1212DBQR
Texas Instruments
-
ISO6721BDR
Texas Instruments
-
SI8710AC-B-ISR
Skyworks Solutions Inc.
-
ISO7720FDR
Texas Instruments
-
ISO7721DR
Texas Instruments
-
ISO7721FDR
Texas Instruments
-
SI8710CC-B-ISR
Skyworks Solutions Inc.
-
ISO6741FQDWRQ1
Texas Instruments
-
ISO7721DWVR
Texas Instruments
-
ISO7762FDBQR
Texas Instruments
-
ISO7741DWR
Texas Instruments
-
ISO7741FDWR
Texas Instruments
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