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Analog Devices Inc./Maxim Integrated MAX14431CAEE+T
- Part No.:
- MAX14431CAEE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
MAX14431CAEE+T.pdf
- Description:
- 4-CHANNEL, LOW POWER, 5KV DIGITA
- Quantity:
- Payment:
- Shipping:
Inventory:1,841
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Product details
Overview
MAX14431CAEE+T from Analog Devices is a 4-channel, unidirectional, high-speed digital galvanic isolator in a 16-pin QSOP package with 3kVRMS isolation rating (60s), 200Mbps max data rate, and default-low output logic. It operates across dual independent 1.71V–5.5V supplies and supports isolated RS-485, SPI, and industrial fieldbus interfaces where robust noise immunity and low power at high speed are critical.
For engineers reviewing the MAX14431CAEE+T datasheet, MAX14431CAEE+T pinout, MAX14431CAEE+T application, or MAX14431CAEE+T equivalent, this device is selected for designs requiring certified 3kVRMS isolation, sub-10ns propagation delay at 3.3V, CMTI ≥50kV/μs, and compatibility with 1.8V–5V level translation between isolated domains.
Technical Context
The MAX14431CAEE+T implements Maxim's proprietary capacitive isolation technology with differential signal transfer across a reinforced dielectric barrier. Its four channels are unidirectional (A→B), with active-low enable inputs and default-low outputs-ensuring safe logic state on power loss or open input.
It features integrated undervoltage lockout (UVLO) on both sides (1.5V–1.66V threshold), supports operation from –40°C to +125°C ambient, and meets UL1577 and CSA Bulletin 5A safety standards for 3kVRMS isolation in the QSOP package.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating | 3kVRMS for 60s (QSOP package); enables single-protection isolation per IEC 60747-5-5 |
| Max Data Rate | 200Mbps; supports high-speed serial links like isolated SPI clock domains or fast digital I/O |
| Propagation Delay | 4.1–20.3ns (VDD = 1.71–5.5V); ensures tight timing control in real-time industrial comms |
| CMTI | ≥50kV/μs typical; rejects fast common-mode transients in motor drives and power converters |
| Supply Range | 1.71V–5.5V per side; allows direct interfacing with 1.8V microcontrollers and 5V peripherals |
| Power @ 1Mbps | 0.57mA (Side A) / 0.72mA (Side B) at 1.8V; enables ultra-low-power isolated sensing nodes |
| Fail-Safe Delay | 50µs; guarantees defined output behavior during input power loss or disconnection |
Pinout & Package
Package: 16-pin QSOP (E16MS+1F), 4mm creepage/clearance, CTI >400 (Group II), RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VDDA | Primary-side supply | 1.71V–5.5V logic supply for input-side circuitry and channel A drivers |
| GNDA | Primary-side ground | Reference for all Side A signals; must be isolated from GNDB by PCB layout |
| IN1–IN4 | Input signals (Side A) | Digital inputs accepting 1.71V–5.5V logic; hysteresis ≥80mV for noise immunity |
| ENA | Enable input (active-low) | Disables all Side A outputs when pulled low; tristates OUT1–OUT4 |
| VDDA | Secondary-side supply | 1.71V–5.5V supply for output-side circuitry and channel B receivers |
| GNDB | Secondary-side ground | Reference for all Side B signals; galvanically isolated from GNDA |
| OUT1–OUT4 | Output signals (Side B) | Default-low CMOS outputs; drive 4mA sink / –4mA source into 15pF load |
| ENB | Enable input (active-low) | Disables all Side B outputs when pulled low; tristates OUT1–OUT4 |
Key Features
| Feature | Design Value |
|---|---|
| 200Mbps data rate | Enables full-duplex isolated SPI at >50MHz SCLK without timing bottlenecks |
| 50kV/μs CMTI | Prevents data corruption in high-noise environments like VFDs and PLC backplanes |
| 1.71V–5.5V dual-supply support | Eliminates external level shifters when bridging 1.8V MCU and 5V sensor domains |
| Default-low output state | Ensures safe de-asserted state on power-up or open-circuit input in fail-safe systems |
| UL1577 & CSA-certified 3kVRMS | Fulfills reinforced insulation requirements for medical and industrial safety compliance |
Applications
| Isolated SPI Interface | Industrial Fieldbus Communication |
|---|---|
Use Scenario: Isolating SPI bus between a host MCU and isolated ADC/DAC or sensor hub in a high-voltage motor control system. IC Role / Device Role / Timing Role: Bidirectional signal isolator for SCLK, MOSI, MISO, and CS lines with matched propagation delays (<2ns skew). Use Value: Prevents ground loop currents and enables safe communication across >1kV potential differences while maintaining 200Mbps timing integrity. | Use Scenario: Galvanic isolation of RS-485 transceiver data lines in distributed I/O modules for factory automation. IC Role / Device Role / Timing Role: Unidirectional isolator for TX and RX paths, supporting 25–200Mbps rates with <10ns pulse width distortion. Use Value: Eliminates bus faults caused by ground potential differences across long cable runs, improving network uptime and ESD resilience. |
| Battery Management Systems | Medical Isolated Data Acquisition |
Use Scenario: Isolating cell voltage monitoring and balancing signals between battery pack electronics and main controller in EV traction batteries. IC Role / Device Role / Timing Role: High-CMTI, low-power isolator for analog front-end digital control signals and fault reporting. Use Value: Maintains signal fidelity under fast dv/dt transients from switching inverters while consuming <1.5mW/channel at 10Mbps. | Use Scenario: Isolating patient-connected sensor data paths (ECG, EEG) from mains-powered processing units in diagnostic equipment. IC Role / Device Role / Timing Role: Safety-certified isolator for digital control and status signals meeting IEC 60601-1 creepage/clearance and leakage current limits. Use Value: Provides 3kVRMS reinforced insulation with 4mm creepage, enabling compact PCB layouts without compromising patient safety. |
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, 3.75kVRMS SOIC; higher VIOWM (560VRMS) but larger footprint | Preferred where higher working voltage or SOIC thermal performance (θJA = 75°C/W) is required | Select SI8641ED-B-IS if board space allows wider SOIC and 3.75kVRMS certification is mandatory |
| ADUM4401BRIZ | 4-channel, 100Mbps, 5kVRMS SOIC; lower speed but higher isolation rating and integrated LDO | Suitable for cost-sensitive, lower-speed industrial gateways needing 5kVRMS and regulated output supply | Choose ADUM4401BRIZ when 5kVRMS regulatory margin or integrated power simplification outweighs 200Mbps need |
Compared with SI8641ED-B-IS and ADUM4401BRIZ, the MAX14431CAEE+T delivers the highest data rate in QSOP form factor with lowest power at 1.8V supply, making it optimal for space-constrained, high-speed, battery-aware isolated interfaces.
Availability
MAX14431CAEE+T 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 certified 3kVRMS isolation.
Supply support for MAX14431CAEE+T 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 semiconductors, serving industrial, automotive, communications, and healthcare markets.
The MAX14430–MAX14432 family was designed specifically for high-speed, low-power galvanic isolation in harsh industrial and medical environments where reliability, safety certification, and supply voltage flexibility are critical.
FAQ
What is the maximum operating temperature range for the MAX14431CAEE+T?
The MAX14431CAEE+T is rated for operation from –40°C to +125°C ambient temperature, with a maximum junction temperature of +150°C. This wide range supports deployment in industrial motor drives, outdoor energy infrastructure, and under-hood automotive subsystems where thermal stress is significant. Derating curves for power and current are provided in the datasheet to ensure safe operation at elevated temperatures.
Does the MAX14431CAEE+T support bidirectional data flow?
No, the MAX14431CAEE+T is a unidirectional isolator with fixed A→B channel direction. It does not support bidirectional signaling on individual channels. For bidirectional isolation, separate forward and reverse channels must be used, or a different variant such as the MAX14430 (which offers configurable direction) should be selected. The "C" suffix in MAX14431CAEE+T confirms the unidirectional configuration.
What safety certifications does the MAX14431CAEE+T hold?
The MAX14431CAEE+T is certified to UL1577 (File E351759) and CSA Bulletin 5A for 3kVRMS isolation in the QSOP package. It meets IEC 60747-5-5 requirements for reinforced insulation, including VIOWM = 445VRMS, VISO = 3000VRMS (60s), and surge withstand of ±7.5kV (1.2/50μs). These certifications validate its use in Class I medical devices and industrial safety-rated equipment.
How does the fail-safe behavior of the MAX14431CAEE+T work?
The MAX14431CAEE+T features a 50µs fail-safe delay: when input power is lost or an input is open-circuited, outputs transition to their default-low state within 50µs. This behavior is guaranteed by internal circuitry-not external pull-downs-and ensures predictable, safe de-assertion of control signals in safety-critical systems like emergency stop circuits or isolated gate drivers.
Can the MAX14431CAEE+T operate with mismatched supply voltages on each side?
Yes, the MAX14431CAEE+T supports independent 1.71V–5.5V supplies on Side A (VDDA/GNDA) and Side B (VDDB/GNDB). This enables true level translation-for example, interfacing a 1.8V FPGA I/O bank with a 5V isolated RS-485 transceiver-without external logic level shifters. Each side's logic thresholds scale with its local VDD, ensuring reliable signal transfer across voltage domains.
MAX14431CAEE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SSOP (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- CAN, RS232, RS422, RS485, SPI
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 3000Vrms
- 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):
- 1.6ns, 1.4ns (Max)
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-QSOP
MAX14431CAEE+T FAQ
1.How can I place an order for MAX14431CAEE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14431CAEE+T 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 MAX14431CAEE+T reliable?
The price and inventory of MAX14431CAEE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14431CAEE+T is usually 5 days.
3.What payment methods are accepted for MAX14431CAEE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14431CAEE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14431CAEE+T?
MAX14431CAEE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14431CAEE+T 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 MAX14431CAEE+T?
For technical support, including MAX14431CAEE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14431CAEE+T requirements.
6.How does Aetrix verify that MAX14431CAEE+T is sourced from the original manufacturer or authorized distributors?
All MAX14431CAEE+T 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 MAX14431CAEE+T meets industry standards.
7.What is the process for return or replacement of MAX14431CAEE+T?
All MAX14431CAEE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14431CAEE+T, 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 MAX14431CAEE+T part is unused and in its original packaging.
Return procedure for MAX14431CAEE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14431CAEE+T Tags
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