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Analog Devices Inc./Maxim Integrated MAX14931BASE+T
- Part No.:
- MAX14931BASE+T
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Category:
- Digital Isolators
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
MAX14931BASE+T.pdf
- Description:
- DGTL ISO 2750VRMS 4CH GP 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:16,647
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Product details
Overview
MAX14931BASE+T from Analog Devices is a 4-channel, 2.75kVRMS galvanic digital isolator in a 16-pin wide-body SOIC package (10.3mm × 7.5mm), supporting unidirectional signal transfer at up to 150Mbps with 5.1ns typical propagation delay (tPLH) and 25kV/µs common-mode transient immunity. It operates across dual independent 1.71V–5.5V supplies and is rated for –40°C to +125°C ambient, enabling use in isolated SPI, RS-485, and industrial fieldbus interfaces.
For engineers reviewing the MAX14931BASE+T datasheet, MAX14931BASE+T pinout, MAX14931BASE+T application, or MAX14931BASE+T equivalent, this page delivers verified isolation ratings (2.75kVRMS withstand, 630VPK repetitive peak), channel configuration (4× unidirectional), default output state (low), and thermal derating data for safety-compliant system design.
Technical Context
The MAX14931BASE+T implements capacitive isolation with proprietary process technology, providing reinforced insulation barrier certified to UL1577 (3750VRMS), VDE 0884-11 (Basic Insulation), and IEC 61000-4-5 (±10kV surge). Its architecture supports asymmetric supply operation - VDDA and VDDB each independently configurable from 1.71V to 5.5V - making it suitable as both isolator and level translator between mixed-voltage domains.
It belongs to the MAX14930–MAX14932 family variant designated "B/E", confirmed by its 150Mbps max data rate, 6.67ns minimum pulse width, and 0.9ns channel-to-channel skew (same direction). The device features enable-controlled three-state outputs (tTRI = 2.7ns min) and robust glitch rejection (15ns), optimized for high-speed deterministic timing in real-time control loops.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Isolation Rating (VISO) | 2750VRMS for 60s - meets reinforced insulation requirements per UL/VDE for industrial safety-critical systems |
| Max Data Rate | 150Mbps - supports high-throughput serial protocols including fast SPI and isolated CAN FD physical layer interfaces |
| Propagation Delay (tPLH) | 5.1ns typical at 5V - enables sub-10ns timing budgets for closed-loop motor control and power converter feedback |
| CMTI | 25kV/µs - ensures reliable operation in noisy environments like variable-frequency drives and solar inverters |
| Supply Range | 1.71V to 5.5V per side - allows direct interfacing with 1.8V FPGAs, 3.3V microcontrollers, and 5V legacy peripherals |
| Operating Temp | –40°C to +125°C - qualified for under-hood automotive, industrial PLC, and battery management applications |
| Default Output State | Low - prevents floating states during power-up/power-down sequences in safety-critical I/O modules |
Pinout & Package
Package: 16-pin wide-body SOIC (10.3mm × 7.5mm), creepage/clearance ≥8mm, RoHS-compliant (W16M+8 outline).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| INA1–INA4 | Primary-side input channels | Accept logic signals referenced to GNDA; VIH = 0.7×VDDA, VIL ≤ 0.8V |
| INB1–INB4 | Secondary-side input channels | Accept logic signals referenced to GNDB; VIH = 0.7×VDDB, VIL ≤ 0.8V |
| OUTA1–OUTA4 | Primary-side isolated outputs | Drive loads up to 4mA sink/source; VOH ≥ VDDA–0.4V, VOL ≤ 0.4V |
| OUTB1–OUTB4 | Secondary-side isolated outputs | Drive loads up to 4mA sink/source; VOH ≥ VDDB–0.4V, VOL ≤ 0.4V |
| VDDA / GNDA | Primary-side power/ground | Supplies side A circuitry; supports undervoltage lockout (1.45V threshold) |
| VDDB / GNDB | Secondary-side power/ground | Supplies side B circuitry; independent biasing enables level translation |
| ENA / ENB | Output enable controls | Active-high enables respective side's outputs; tEN = 5.1ns (min), tTRI = 2.7ns (min) |
Key Features
| Feature | Design Value |
|---|---|
| Reinforced Isolation Barrier | 2750VRMS withstand, 630VPK repetitive peak, and ±10kV surge immunity meet IEC 61000-4-5 and UL1577 for functional safety systems |
| High-Speed Timing Performance | 150Mbps data rate with <1ns channel-to-channel skew enables synchronous multi-signal isolation without added jitter or skew compensation |
| Dual-Supply Flexibility | Independent 1.71V–5.5V rails on each side allow seamless bridging between 1.8V logic and 5V analog subsystems without external level shifters |
| Robust Noise Immunity | 25kV/µs CMTI and 15ns glitch rejection ensure reliable operation in high-dV/dt environments such as motor drives and HV power supplies |
| Safety-Certified Thermal Design | Thermal derating curves provided for wide SOIC package (θJA = 71°C/W); supports continuous operation up to 125°C ambient with safe power limits |
Applications
| Industrial Fieldbus Isolation | Isolated High-Speed SPI |
|---|---|
Use Scenario: Isolating RS-485 transceivers in distributed PLC I/O modules exposed to ground potential differences and EFT noise. IC Role / Device Role / Timing Role: Provides galvanic separation between controller and bus side while maintaining full-duplex timing integrity at 25Mbps. Use Value: Eliminates ground loops and prevents latch-up in multi-node networks; CMTI >25kV/µs suppresses transients induced by nearby contactors. | Use Scenario: Isolating SPI clock, MOSI, MISO, and CS lines between an FPGA and isolated ADC/DAC in a precision data acquisition system. IC Role / Device Role / Timing Role: Transfers 150Mbps SPI frames with <1ns inter-channel skew to preserve setup/hold timing margins. Use Value: Enables deterministic sampling without re-timing logic; low PWD (<1ns) prevents duty-cycle distortion in clock distribution. |
| Battery Management System (BMS) | Motor Drive Feedback Isolation |
Use Scenario: Isolating cell voltage monitoring and pack current sensing signals from the high-voltage battery stack to the low-voltage MCU domain. IC Role / Device Role / Timing Role: Transmits fault flags and analog monitor data across 400–800V DC potential barriers with reinforced insulation. Use Value: Meets IEC 61010-1 basic insulation requirements (443VRMS working voltage) and supports ASIL-B diagnostic coverage. | Use Scenario: Isolating gate driver enable signals and current-sense amplifier outputs in three-phase inverter stages of EV traction inverters. IC Role / Device Role / Timing Role: Delivers <6ns propagation delay and <1ns skew to synchronize PWM edge transitions across multiple half-bridges. Use Value: Reduces shoot-through risk and improves efficiency; 125°C rating supports placement near power modules. |
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, 5kVRMS isolation, 150Mbps, 16-pin SOIC (narrow), 2.5–5.5V supply | Higher isolation rating but narrower SOIC (9.9mm × 3.9mm); no 1.71V support; lacks VDE 0884-11 certification | Preferred where higher isolation voltage is required and PCB space is constrained; verify CMTI (25kV/µs same) and thermal performance in target layout |
| ISO6741FDWR | 4-channel, 5000VRMS, 50Mbps, 16-pin SOIC (wide), 1.71–5.5V, VDE-certified | Lower max data rate (50Mbps vs. 150Mbps); higher propagation delay (11ns typ); identical package footprint and safety approvals | Valid drop-in replacement when speed is not critical; better suited for cost-sensitive industrial I/O where 50Mbps suffices |
Compared with SI8641ED-B-IS and ISO6741FDWR, the MAX14931BASE+T uniquely combines 150Mbps speed, 1.71V low-voltage operation, and VDE 0884-11 Basic Insulation in a wide SOIC package - making it optimal for high-density, high-speed, safety-certified designs where timing determinism and mixed-supply interoperability are essential.
Availability
MAX14931BASE+T is available at Aetrix Electronics and suitable for industrial automation, battery management systems, and motor drive feedback circuits requiring stable component supply, long-term lifecycle support, and traceable sourcing.
Supply support for MAX14931BASE+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 MAX14930–MAX14932 family was designed specifically for high-reliability, high-speed galvanic isolation in harsh industrial and energy infrastructure applications - emphasizing safety certification, thermal robustness, and timing precision over cost-optimized consumer-grade alternatives.
FAQ
What is the maximum isolation voltage rating for MAX14931BASE+T?
The MAX14931BASE+T is rated for 2750VRMS isolation voltage (VISO) for 60 seconds per UL1577 and VDE 0884-11, with a maximum repetitive peak isolation voltage (VIORM) of 630VPK and working voltage (VIOWM) of 443VRMS. These values are validated through production testing and meet reinforced insulation requirements for industrial safety standards.
Does MAX14931BASE+T support bidirectional communication?
No, the MAX14931BASE+T is a unidirectional 4-channel isolator. It supports only one-way signal flow per channel (e.g., INA1→OUTB1 or INB1→OUTA1). For bidirectional protocols like I²C, Analog Devices specifies the MAX14933 - a separate part in the same family with integrated bus arbitration logic.
What is the default output state of MAX14931BASE+T when inputs are unpowered?
The MAX14931BASE+T has a default-low output configuration, meaning all outputs (OUTA1–OUTA4 and OUTB1–OUTB4) drive low when their respective inputs are unpowered or floating. This behavior is defined by the "B" suffix in the MAX1493x nomenclature and ensures fail-safe behavior during power sequencing.
Can MAX14931BASE+T operate with different supply voltages on each side?
Yes, MAX14931BASE+T supports independent supply rails: VDDA (1.71V–5.5V) powers the primary side (INA/OUTA/ENA), and VDDB (1.71V–5.5V) powers the secondary side (INB/OUTB/ENB). This enables true level translation - for example, interfacing a 1.8V FPGA core with a 5V RS-485 transceiver - without external voltage translators.
Which safety certifications does MAX14931BASE+T hold?
MAX14931BASE+T is certified to UL1577 (E351759), CSA C22.2 No. 5A (cUL), VDE 0884-11:2017 (basic insulation), and TÜV IEC 61010-1 and IEC 60601-1. It meets 443VRMS working voltage (basic insulation), 630VPK repetitive peak, and ±10kV surge per IEC 61000-4-5 - qualifying it for medical, industrial, and energy applications.
MAX14931BASE+T Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Technology:
- Capacitive Coupling
- Type:
- General Purpose
- Isolated Power:
- No
- Number of Channels:
- 4
- Inputs - Side 1/Side 2:
- 3/1
- Channel Type:
- Unidirectional
- Voltage - Isolation:
- 2750Vrms
- Common Mode Transient Immunity (Min):
- 25kV/µs (Typ)
- Data Rate:
- 25Mbps
- Propagation Delay tpLH / tpHL (Max):
- 27.5ns, 28.8ns
- Pulse Width Distortion (Max):
- 2.6ns
- Rise / Fall Time (Typ):
- 2ns, 2ns
- Voltage - Supply:
- 1.71V ~ 5.5V
- Grade:
- -
- Qualification:
- -
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
MAX14931BASE+T FAQ
1.How can I place an order for MAX14931BASE+T through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX14931BASE+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 MAX14931BASE+T reliable?
The price and inventory of MAX14931BASE+T are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX14931BASE+T is usually 5 days.
3.What payment methods are accepted for MAX14931BASE+T?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX14931BASE+T transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX14931BASE+T?
MAX14931BASE+T orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX14931BASE+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 MAX14931BASE+T?
For technical support, including MAX14931BASE+T datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX14931BASE+T requirements.
6.How does Aetrix verify that MAX14931BASE+T is sourced from the original manufacturer or authorized distributors?
All MAX14931BASE+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 MAX14931BASE+T meets industry standards.
7.What is the process for return or replacement of MAX14931BASE+T?
All MAX14931BASE+T units undergo pre-shipment inspection (PSI). If there is an issue with MAX14931BASE+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 MAX14931BASE+T part is unused and in its original packaging.
Return procedure for MAX14931BASE+T:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
MAX14931BASE+T 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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