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Analog Devices Inc./Maxim Integrated MAX22344BAAP+
- Part No.:
- MAX22344BAAP+
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
MAX22344BAAP+.pdf
- Description:
- 4CH LOW PWR HIGH SPD DGTL ISO
- Quantity:
- Payment:
- Shipping:
Inventory:2,786
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Product details
Overview
MAX22344BAAP+ from Maxim Integrated is a reinforced, 4-channel digital galvanic isolator in 20-pin SSOP package, delivering 200Mbps maximum data rate, 3.75kVRMS withstand voltage (60s), and 50kV/μs CMTI. It features independent 1.71V–5.5V dual-supply operation, pin-selectable output default states, and active-high enable inputs-designed for high-speed isolated SPI, RS-485, and industrial fieldbus interfaces.
For engineers reviewing the MAX22344BAAP+ datasheet, MAX22344BAAP+ pinout, MAX22344BAAP+ application, or MAX22344BAAP+ equivalent, this device supports fast, low-power isolation with reinforced safety certification (UL, cUL, VDE), precise timing control (typ. 5.7ns propagation delay at 3.3V), and robust surge immunity (±10kV), making it critical for battery management systems and medical isolation barriers where signal integrity and regulatory compliance are non-negotiable.
Technical Context
The MAX22344BAAP+ implements capacitive-based galvanic isolation with proprietary process technology, enabling bidirectional signal transfer across an isolation barrier rated for continuous 784VRMS working voltage and 5.3kVPK transient withstand. Its architecture supports unidirectional channel configuration with side-A and side-B logic domains operating independently under separate supply rails.
It integrates undervoltage lockout (1.5V–1.66V threshold) on both sides, input hysteresis (410mV), and configurable output default states (high/low via DEF pins). Timing performance is optimized for high-speed serial protocols: minimum pulse width of 5.0ns (at VDD ≥ 2.25V), peak eye jitter ≤100ps at 200Mbps, and channel-to-channel skew ≤2.0ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3.75kVRMS for 60s (reinforced); enables compliance with IEC 61000-4-5 surge immunity up to ±10kV |
| Max Data Rate | 200Mbps - supports high-speed SPI clocking and real-time industrial Ethernet backplane signaling |
| Propagation Delay | Typ. 5.7ns (tPLH, VDD = 3.3V) - ensures sub-10ns timing budget for deterministic control loops |
| CMTI | 50kV/μs typical - prevents false triggering in noisy motor drive or power converter environments |
| Supply Range | 1.71V to 5.5V per side - allows direct interfacing with 1.8V microcontrollers and 5V legacy peripherals |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and battery pack monitoring |
| Package | 20-pin SSOP, 5.5mm creepage/clearance, CTI ≥400V (Group II) - meets IPC-2221B spacing requirements |
Pinout & Package
MAX22344BAAP+ uses a 20-pin SSOP package (A20MS+7 outline) with 0.65mm pitch, 5.5mm minimum creepage and clearance, and Group II comparative tracking index (CTI ≥400V).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Side-A power supply | Provides 1.71V–5.5V bias for input-side logic and isolator transmitter; decoupling required |
| GNDA | Side-A ground reference | Return path for VDDA; must be isolated from GNDB by PCB layout and physical barrier |
| IN1–IN4 | Side-A digital inputs | Accept CMOS-level signals; support 1.71V–5.5V logic thresholds with hysteresis |
| ENA | Side-A output enable (active-high) | Enables/disables all four side-A outputs simultaneously; internal pullup defaults to high |
| DEFA | Side-A output default state select | Configures output state (high/low) during power-up, undervoltage, or open-circuit input |
| VDDA | Side-B power supply | Independent 1.71V–5.5V rail for output-side logic; enables level translation between domains |
| GNDB | Side-B ground reference | Return path for VDDB; galvanically isolated from GNDA; defines secondary domain reference |
| OUT1–OUT4 | Side-B digital outputs | CMOS outputs capable of sourcing/sinking 4mA; VOH = VDDA – 0.4V, VOL = 0.4V |
| ENB | Side-B output enable (active-high) | Controls side-B outputs; internal pullup ensures enabled state at power-on if left floating |
| DEFB | Side-B output default state select | Matches DEFA function on side-B; allows synchronized fail-safe behavior across isolation barrier |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation | 3.75kVRMS (60s), VIOWM = 784VRMS, VIOTM = 5.3kVPK - certified to UL1577, CSA 5A, and VDE 0884-11 |
| Low-Power Operation | 0.74mW/channel @ 1Mbps (1.8V) - reduces thermal load in dense industrial modules and portable medical devices |
| High-Speed Timing | 200Mbps max rate, 5.7ns typ. propagation delay, <2ns channel skew - preserves signal integrity in high-frequency SPI and encoder interfaces |
| Configurable Defaults | Pin-selectable output state (high/low) during fault conditions - enables safe startup and fail-dead strategies in BMS and PLC I/O |
| Robust ESD & Surge | ±4kV HBM ESD rating; ±10kV surge (1.2/50μs) across isolation barrier - protects against field-induced transients in factory automation |
Applications
| Isolated SPI Interface | Industrial Fieldbus Communication |
|---|---|
|
Use Scenario: Isolating SPI bus between MCU (side A) and isolated ADC/DAC or sensor hub (side B) in motor drives. IC Role / Device Role / Timing Role: Bidirectional signal isolator for SCLK, MOSI, MISO, and CS lines with sub-10ns timing alignment. Use Value: Prevents ground loop noise corruption while maintaining full 200Mbps throughput for real-time current/voltage sampling. |
Use Scenario: Interfacing PLC CPU to RS-485 field nodes in hazardous zone instrumentation networks. IC Role / Device Role / Timing Role: Galvanic barrier for differential TX/RX pairs and control signals, meeting IEC 61000-4-5 Level 4 surge immunity. Use Value: Enables 25+ node daisy-chain topology with 3.75kVRMS isolation margin and 50kV/μs CMTI noise rejection. |
| Battery Management Systems | Medical Isolation Barriers |
|
Use Scenario: Cell voltage monitoring in EV traction battery packs with >800V DC bus potential. IC Role / Device Role / Timing Role: Isolates analog front-end multiplexer control and status reporting signals from high-voltage domain. Use Value: Supports ASIL-D functional safety architecture via reinforced insulation and 125°C ambient operation. |
Use Scenario: Patient-connected ECG/EEG front-end isolation in diagnostic imaging equipment. IC Role / Device Role / Timing Role: Provides patient-isolation barrier for digital control and data acquisition paths per IEC 60601-1 3rd ed. Use Value: Meets 2× MOPP requirement with 5.5mm creepage, reinforced VDE certification, and <1.5pF barrier capacitance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar digital isolator applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Si8641ED-B-IS | 4-channel, 200Mbps, 5kVRMS reinforced isolation; 2.5V–5.5V supplies; no pin-selectable default state | Lacks configurable output default; requires external pull resistors for fail-safe behavior | Preferred when board space permits SOIC-16 and fixed-default logic suffices |
| ADUM2401ARWZ | 4-channel, 25Mbps, 5kVRMS; 3.0V–5.5V only; higher propagation delay (typ. 35ns) | Lower speed limits use in high-resolution SPI or fast encoder feedback loops | Selected for cost-sensitive, lower-bandwidth industrial I/O where 25Mbps is sufficient |
Compared with Si8641ED-B-IS and ADUM2401ARWZ, the MAX22344BAAP+ uniquely combines 200Mbps speed, pin-configurable defaults, and 1.71V–5.5V dual-supply flexibility-enabling single-part support for both ultra-low-power sensor nodes and high-speed motor control interfaces without redesign.
Availability
MAX22344BAAP+ is available at Aetrix Electronics and suitable for industrial automation, battery management systems, and medical diagnostics requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for MAX22344BAAP+ 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
Maxim Integrated, now part of Analog Devices, designs precision analog, mixed-signal, and high-reliability interface ICs for demanding industrial, automotive, and medical applications.
The MAX22344–MAX22346 family was engineered specifically for high-speed, low-power galvanic isolation in harsh environments-emphasizing reinforced safety, wide supply range, and configurable fail-safe behavior for next-generation BMS and programmable logic controllers.
FAQ
What is the maximum data rate supported by the MAX22344BAAP+?
The MAX22344BAAP+ supports a maximum data rate of 200Mbps under 2.25V–5.5V supply conditions. At lower supplies (1.71V–2.25V), the guaranteed maximum drops to 150Mbps. This high-speed capability enables its use in fast SPI interfaces and real-time industrial communication links where timing margins are tight.
Does the MAX22344BAAP+ require external components for basic operation?
No external components are required for core isolation functionality. The MAX22344BAAP+ includes internal pullup resistors on ENA/ENB and supports pin-selectable output defaults. However, 0.1µF bypass capacitors on VDDA and VDDB are mandatory per datasheet recommendations to ensure stable power delivery and noise immunity.
What safety certifications does the MAX22344BAAP+ hold?
The MAX22344BAAP+ is certified to UL1577 (File E351759), CSA Bulletin 5A (cUL), and VDE 0884-11:2017-01 for reinforced insulation. It achieves 3.75kVRMS withstand voltage (60s), 784VRMS working voltage, and 5.3kVPK transient isolation-meeting requirements for 2× MOPP in medical and reinforced protection in industrial systems.
How does the MAX22344BAAP+ handle undervoltage conditions?
The MAX22344BAAP+ incorporates undervoltage lockout (UVLO) on both sides with a threshold of 1.5V–1.66V (typ. 1.6V) and 45mV hysteresis. When either VDDA or VDDB falls below UVLO, outputs enter their pin-configured default state (high or low), preventing undefined logic states during brownout or power sequencing events.
Can the MAX22344BAAP+ be used for level translation between 1.8V and 5V domains?
Yes-the MAX22344BAAP+ supports independent 1.71V–5.5V supplies on each side, allowing seamless level translation. For example, side-A can operate at 1.8V (MCU I/O) while side-B runs at 5V (legacy RS-485 transceiver), with full 200Mbps throughput and guaranteed logic thresholds compliant across the entire supply range.
MAX22344BAAP+ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- CAN, RS422, RS485, SPI
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 4/0
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3750Vrms
- Common Mode Transient Immunity (Min):
- 50kV/µs (Typ)
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 32.5ns, 33.6ns
- Pulse Width Distortion (Max):
- 4ns
- 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:
- 20-SSOP
MAX22344BAAP+ FAQ
1.How can I place an order for MAX22344BAAP+ through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX22344BAAP+ 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 MAX22344BAAP+ reliable?
The price and inventory of MAX22344BAAP+ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX22344BAAP+ is usually 5 days.
3.What payment methods are accepted for MAX22344BAAP+?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX22344BAAP+ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX22344BAAP+?
MAX22344BAAP+ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX22344BAAP+ 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 MAX22344BAAP+?
For technical support, including MAX22344BAAP+ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX22344BAAP+ requirements.
6.How does Aetrix verify that MAX22344BAAP+ is sourced from the original manufacturer or authorized distributors?
All MAX22344BAAP+ 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 MAX22344BAAP+ meets industry standards.
7.What is the process for return or replacement of MAX22344BAAP+?
All MAX22344BAAP+ units undergo pre-shipment inspection (PSI). If there is an issue with MAX22344BAAP+, 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 MAX22344BAAP+ part is unused and in its original packaging.
Return procedure for MAX22344BAAP+:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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